Articles | Volume 7, issue 12
https://doi.org/10.5194/amt-7-4237-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/amt-7-4237-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
08 Dec 2014
Research article |
| 08 Dec 2014
Prerequisites for application of hyperbolic relaxed eddy accumulation on managed grasslands and alternative net ecosystem exchange flux partitioning
M. Riederer
CORRESPONDING AUTHOR
now at: Regensburg Center of Energy and Resources, Regensburg University of Applied Sciences, 93049 Regensburg, Germany
Department of Micrometeorology, University of Bayreuth, 95440 Bayreuth, Germany
J. Hübner
Department of Micrometeorology, University of Bayreuth, 95440 Bayreuth, Germany
J. Ruppert
Department of Micrometeorology, University of Bayreuth, 95440 Bayreuth, Germany
now at: Research Institute of the Cement Industry, 40410 Düsseldorf, Germany
W. A. Brand
Max Planck Institute for Biogeochemistry, 07745 Jena, Germany
Member of Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440 Bayreuth, Germany
Department of Micrometeorology, University of Bayreuth, 95440 Bayreuth, Germany
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Using eddy-covariance systems deployed in three cities, we aimed to elucidate the sources of discrepancies in flux estimations from different software packages. One crucial finding is the impact of low-frequency spectral loss corrections on tall-tower flux estimations. Our findings emphasize the significance of a standardized measurement setup and consistent postprocessing configurations in minimizing the systematic flux uncertainty resulting from the usage of different software packages.
Yunsong Liu, Jean-Daniel Paris, Gregoire Broquet, Violeta Bescós Roy, Tania Meixus Fernandez, Rasmus Andersen, Andrés Russu Berlanga, Emil Christensen, Yann Courtois, Sebastian Dominok, Corentin Dussenne, Travis Eckert, Andrew Finlayson, Aurora Fernández de la Fuente, Catlin Gunn, Ram Hashmonay, Juliano Grigoleto Hayashi, Jonathan Helmore, Soeren Honsel, Fabrizio Innocenti, Matti Irjala, Torgrim Log, Cristina Lopez, Francisco Cortés Martínez, Jonathan Martinez, Adrien Massardier, Helle Gottschalk Nygaard, Paula Agregan Reboredo, Elodie Rousset, Axel Scherello, Matthias Ulbricht, Damien Weidmann, Oliver Williams, Nigel Yarrow, Murès Zarea, Robert Ziegler, Jean Sciare, Mihalis Vrekoussis, and Philippe Bousquet
Atmos. Meas. Tech., 17, 1633–1649, https://doi.org/10.5194/amt-17-1633-2024, https://doi.org/10.5194/amt-17-1633-2024, 2024
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We investigated the performance of 10 methane emission quantification techniques in a blind controlled-release experiment at an inerted natural gas compressor station. We reported their respective strengths, weaknesses, and potential complementarity depending on the emission rates and atmospheric conditions. Additionally, we assess the dependence of emission quantification performance on key parameters such as wind speed, deployment constraints, and measurement duration.
Jörg Beecken, Andreas Weigelt, Simone Griesel, Johan Mellqvist, Alexander V. Conde Jacobo, Daniëlle van Dinther, Jan Duyzer, Jon Knudsen, Bettina Knudsen, and Leonidas Ntziachristos
Atmos. Meas. Tech., 16, 5883–5895, https://doi.org/10.5194/amt-16-5883-2023, https://doi.org/10.5194/amt-16-5883-2023, 2023
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Air pollution from shipping is a debated topic in science and politics. We compare different monitoring systems currently used in different European countries for the enforcement of emission limits regarding air pollution from ships according to regulation. The system performances were individually assessed in the field by comparison with true values. Non-compliant vessels with actual fuel sulfur contents > 0.15–0.19 % Sm/m can be detected by the compared systems with 95 % confidence.
Hossein Maazallahi, Antonio Delre, Charlotte Scheutz, Anders M. Fredenslund, Stefan Schwietzke, Hugo Denier van der Gon, and Thomas Röckmann
Atmos. Meas. Tech., 16, 5051–5073, https://doi.org/10.5194/amt-16-5051-2023, https://doi.org/10.5194/amt-16-5051-2023, 2023
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Measurement methods are increasingly deployed to verify reported methane emissions of gas leaks. This study describes unique advantages and limitations of three methods. Two methods are rapidly deployed, but uncertainties and biases exist for some leak locations. In contrast, the suction method could accurately determine leak rates in principle. However, this method, which provides data for the German emission inventory, creates an overall low bias in our study due to non-random site selection.
Max Müller, Stefan Weigl, Jennifer Müller-Williams, Matthias Lindauer, Thomas Rück, Simon Jobst, Rudolf Bierl, and Frank-Michael Matysik
Atmos. Meas. Tech., 16, 4263–4270, https://doi.org/10.5194/amt-16-4263-2023, https://doi.org/10.5194/amt-16-4263-2023, 2023
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Over a period of 5 d, a photoacoustic methane sensor was compared with a Picarro cavity ring-down (G2301) spectrometer. Both devices measured the ambient methane concentration at the meteorological observatory Hohenpeißenberg. Cross-sensitivities on the photoacoustic signal, due to fluctuating ambient humidity, were compensated by applying the CoNRad algorithm. The results show that photoacoustic sensors have the potential for accurate and precise greenhouse gas monitoring.
Antje Hoheisel, Cedric Couret, Bryan Hellack, and Martina Schmidt
Atmos. Meas. Tech., 16, 2399–2413, https://doi.org/10.5194/amt-16-2399-2023, https://doi.org/10.5194/amt-16-2399-2023, 2023
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High-precision CO2, CH4 and CO measurements have been carried out at Zugspitze for decades. New technologies make it possible to analyse these gases with high temporal resolution. This allows the detection of local pollution. To this end, measurements have been performed on the mountain ridge (ZGR) and are compared to routine measurements at the Schneefernerhaus (ZSF). Careful manual flagging of pollution events in the ZSF data leads to consistency with the little influenced ZGR time series.
Róisín Commane, Andrew Hallward-Driemeier, and Lee T. Murray
Atmos. Meas. Tech., 16, 1431–1441, https://doi.org/10.5194/amt-16-1431-2023, https://doi.org/10.5194/amt-16-1431-2023, 2023
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Methane / ethane ratios can be used to identify and partition the different sources of methane, especially in areas with natural gas mixed with biogenic methane emissions, such as cities. We tested three commercially available laser-based analyzers for sensitivity, precision, size, power requirement, ease of use on mobile platforms, and expertise needed to operate the instrument, and we make recommendations for use in various situations.
Yarong Peng, Hongli Wang, Yaqin Gao, Shengao Jing, Shuhui Zhu, Dandan Huang, Peizhi Hao, Shengrong Lou, Tiantao Cheng, Cheng Huang, and Xuan Zhang
Atmos. Meas. Tech., 16, 15–28, https://doi.org/10.5194/amt-16-15-2023, https://doi.org/10.5194/amt-16-15-2023, 2023
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This work examined the phase partitioning behaviors of organic compounds at hourly resolution in ambient conditions with the use of the CHemical Analysis of aeRosols ONline (CHARON) inlet coupled to a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS). Properly accounting for the neutral losses of small moieties during the molecular feature extraction from PTR mass spectra could significantly reduce uncertainties associated with the gas–particle partitioning measurements.
Stuart N. Riddick, Riley Ancona, Mercy Mbua, Clay S. Bell, Aidan Duggan, Timothy L. Vaughn, Kristine Bennett, and Daniel J. Zimmerle
Atmos. Meas. Tech., 15, 6285–6296, https://doi.org/10.5194/amt-15-6285-2022, https://doi.org/10.5194/amt-15-6285-2022, 2022
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This describes controlled release experiments at the METEC facility in Fort Collins, USA, that investigates the accuracy and precision of five methods commonly used to measure methane emissions. Methods include static/dynamic chambers, hi flow sampling, a backward Lagrangian stochastic method, and a Gaussian plume method. This is the first time that methods for measuring CH4 emissions from point sources less than 200 g CH4 h−1 have been quantitively assessed against references and each other.
Broghan M. Erland, Cristen Adams, Andrea Darlington, Mackenzie L. Smith, Andrew K. Thorpe, Gregory R. Wentworth, Steve Conley, John Liggio, Shao-Meng Li, Charles E. Miller, and John A. Gamon
Atmos. Meas. Tech., 15, 5841–5859, https://doi.org/10.5194/amt-15-5841-2022, https://doi.org/10.5194/amt-15-5841-2022, 2022
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Accurately estimating greenhouse gas (GHG) emissions is essential to reaching net-zero goals to combat the climate crisis. Airborne box-flights are ideal for assessing regional GHG emissions, as they can attain small error. We compare two box-flight algorithms and found they produce similar results, but daily variability must be considered when deriving emissions inventories. Increasing the consistency and agreement between airborne methods moves us closer to achieving more accurate estimates.
Daniel Furuta, Tofigh Sayahi, Jinsheng Li, Bruce Wilson, Albert A. Presto, and Jiayu Li
Atmos. Meas. Tech., 15, 5117–5128, https://doi.org/10.5194/amt-15-5117-2022, https://doi.org/10.5194/amt-15-5117-2022, 2022
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Methane is a major greenhouse gas and contributor to climate change with various human-caused and natural sources. Currently, atmospheric methane is expensive to sense. We investigate repurposing cheap methane safety sensors for atmospheric sensing, finding several promising sensors and identifying some of the challenges in this approach. This work will help in developing inexpensive sensor networks for methane monitoring, which will aid in reducing methane leaks and emissions.
Clare E. Singer, Benjamin W. Clouser, Sergey M. Khaykin, Martina Krämer, Francesco Cairo, Thomas Peter, Alexey Lykov, Christian Rolf, Nicole Spelten, Armin Afchine, Simone Brunamonti, and Elisabeth J. Moyer
Atmos. Meas. Tech., 15, 4767–4783, https://doi.org/10.5194/amt-15-4767-2022, https://doi.org/10.5194/amt-15-4767-2022, 2022
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In situ measurements of water vapor in the upper troposphere are necessary to study cloud formation and hydration of the stratosphere but challenging due to cold–dry conditions. We compare measurements from three water vapor instruments from the StratoClim campaign in 2017. In clear sky (clouds), point-by-point differences were <1.5±8 % (<1±8 %). This excellent agreement allows detection of fine-scale structures required to understand the impact of convection on stratospheric water vapor.
Sebastian Diez, Stuart E. Lacy, Thomas J. Bannan, Michael Flynn, Tom Gardiner, David Harrison, Nicholas Marsden, Nicholas A. Martin, Katie Read, and Pete M. Edwards
Atmos. Meas. Tech., 15, 4091–4105, https://doi.org/10.5194/amt-15-4091-2022, https://doi.org/10.5194/amt-15-4091-2022, 2022
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Regardless of the cost of the measuring instrument, there are no perfect measurements. For this reason, we compare the quality of the information provided by cheap devices when they are used to measure air pollutants and we try to emphasise that before judging the potential usefulness of the devices, the user must specify his own needs. Since commonly used performance indices/metrics can be misleading in qualifying this, we propose complementary visual analysis to the more commonly used metrics.
Ashley S. Bittner, Eben S. Cross, David H. Hagan, Carl Malings, Eric Lipsky, and Andrew P. Grieshop
Atmos. Meas. Tech., 15, 3353–3376, https://doi.org/10.5194/amt-15-3353-2022, https://doi.org/10.5194/amt-15-3353-2022, 2022
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We present findings from a 1-year pilot deployment of low-cost integrated air quality sensor packages in rural Malawi using calibration models developed during collocation with US regulatory monitors. We compare the results with data from remote sensing products and previous field studies. We conclude that while the remote calibration approach can help extract useful data, great care is needed when assessing low-cost sensor data collected in regions without reference instrumentation.
Noah Bernays, Daniel A. Jaffe, Irina Petropavlovskikh, and Peter Effertz
Atmos. Meas. Tech., 15, 3189–3192, https://doi.org/10.5194/amt-15-3189-2022, https://doi.org/10.5194/amt-15-3189-2022, 2022
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Ozone is an important pollutant that impacts millions of people worldwide. It is therefore important to ensure accurate measurements. A recent surge in wildfire activity in the USA has resulted in significant enhancements in ozone concentration. However given the nature of wildfire smoke, there are questions about our ability to accurately measure ozone. In this comment, we discuss possible biases in the UV measurements of ozone in the presence of smoke.
Gérard Ancellet, Sophie Godin-Beekmann, Herman G. J. Smit, Ryan M. Stauffer, Roeland Van Malderen, Renaud Bodichon, and Andrea Pazmiño
Atmos. Meas. Tech., 15, 3105–3120, https://doi.org/10.5194/amt-15-3105-2022, https://doi.org/10.5194/amt-15-3105-2022, 2022
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The 1991–2021 Observatoire de Haute Provence electrochemical concentration cell (ECC) ozonesonde data have been homogenized according to the recommendations of the Ozonesonde Data Quality Assessment panel. Comparisons with ground-based instruments also measuring ozone at the same station (lidar, surface measurements) and with colocated satellite observations show the benefits of this homogenization. Remaining differences between ECC and other observations in the stratosphere are also discussed.
Horim Kim, Michael Müller, Stephan Henne, and Christoph Hüglin
Atmos. Meas. Tech., 15, 2979–2992, https://doi.org/10.5194/amt-15-2979-2022, https://doi.org/10.5194/amt-15-2979-2022, 2022
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In this study, the performance of electrochemical sensors for NO and NO2 for measuring air quality was determined over a longer operating period. The performance of NO sensors remained reliable for more than 18 months. However, the NO2 sensors showed decreasing performance over time. During deployment, we found that the NO2 sensors can distinguish general pollution levels, but they proved unsuitable for accurate measurements due to significant biases.
Randulph Morales, Jonas Ravelid, Katarina Vinkovic, Piotr Korbeń, Béla Tuzson, Lukas Emmenegger, Huilin Chen, Martina Schmidt, Sebastian Humbel, and Dominik Brunner
Atmos. Meas. Tech., 15, 2177–2198, https://doi.org/10.5194/amt-15-2177-2022, https://doi.org/10.5194/amt-15-2177-2022, 2022
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Mapping trace gas emission plumes using in situ measurements from unmanned aerial vehicles (UAVs) is an emerging and attractive possibility to quantify emissions from localized sources. We performed an extensive controlled-release experiment to develop an optimal quantification method and to determine the related uncertainties under various environmental and sampling conditions. Our approach was successful in quantifying local methane sources from drone-based measurements.
Junlei Zhan, Yongchun Liu, Wei Ma, Xin Zhang, Xuezhong Wang, Fang Bi, Yujie Zhang, Zhenhai Wu, and Hong Li
Atmos. Meas. Tech., 15, 1511–1520, https://doi.org/10.5194/amt-15-1511-2022, https://doi.org/10.5194/amt-15-1511-2022, 2022
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Our study investigated the O3 formation sensitivity in Beijing using a random forest model coupled with the reactivity of volatile organic
compound (VOC) species. Results found that random forest accurately predicted O3 concentration when initial VOCs were considered, and relative importance correlated well with O3 formation potential. The O3 isopleth curves calculated by the random forest model were generally comparable with those calculated by the box model.
Daniel R. Peters, Olalekan A. M. Popoola, Roderic L. Jones, Nicholas A. Martin, Jim Mills, Elizabeth R. Fonseca, Amy Stidworthy, Ella Forsyth, David Carruthers, Megan Dupuy-Todd, Felicia Douglas, Katie Moore, Rishabh U. Shah, Lauren E. Padilla, and Ramón A. Alvarez
Atmos. Meas. Tech., 15, 321–334, https://doi.org/10.5194/amt-15-321-2022, https://doi.org/10.5194/amt-15-321-2022, 2022
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We present more than 2 years of NO2 pollution measurements from a sensor network in Greater London and compare results to an extensive network of expensive reference-grade monitors. We show the ability of our lower-cost network to generate robust insights about local air pollution. We also show how irregularities in sensor performance lead to some uncertainty in results and demonstrate ways that future users can characterize and mitigate uncertainties to get the most value from sensor data.
Timothy G. Pernini, T. Scott Zaccheo, Jeremy Dobler, and Nathan Blume
Atmos. Meas. Tech., 15, 225–240, https://doi.org/10.5194/amt-15-225-2022, https://doi.org/10.5194/amt-15-225-2022, 2022
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We demonstrate a novel approach to estimating emissions from oil sands operations that utilizes the GreenLITE™ gas concentration measurement system and an atmospheric model. While deployed at a facility in the Athabasca region of Alberta, Canada, CH4 emissions from a tailings pond were estimated to be 7.2 t/d for July–October 2019, and 5.1 t/d for March–July 2020. CH4 emissions from an open-pit mine were estimated to be 24.6 t/d for September–October 2019.
Wengang Zhang, Ling Wang, Yang Yu, Guirong Xu, Xiuqing Hu, Zhikang Fu, and Chunguang Cui
Atmos. Meas. Tech., 14, 7821–7834, https://doi.org/10.5194/amt-14-7821-2021, https://doi.org/10.5194/amt-14-7821-2021, 2021
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Global precipitable water vapor (PWV) derived from MERSI-II (Medium Resolution Spectral Imager) is compared with PWV from the Integrated Global Radiosonde Archive (IGRA). Our results show a good agreement between PWV from MERSI-II and IGRA and that MERSI-II PWV is slightly underestimated on the whole, especially in summer. The bias between MERSI-II and IGRA grows with a larger spatial distance between the footprint of the satellite and the IGRA station, as well as increasing PWV.
Trevor W. Coates, Monzurul Alam, Thomas K. Flesch, and Guillermo Hernandez-Ramirez
Atmos. Meas. Tech., 14, 7147–7152, https://doi.org/10.5194/amt-14-7147-2021, https://doi.org/10.5194/amt-14-7147-2021, 2021
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A field study tested two footprint models for calculating surface emissions from downwind flux measurements. Emission rates from a 10 × 10 m synthetic source were estimated with the simple Kormann–Meixner model and a sophisticated Lagrangian stochastic model. Both models underestimated emissions by approximately 30 %, and no statistical differences were observed between the models. Footprint models are critically important for interpreting eddy covariance measurements.
Teles C. Furlani, Patrick R. Veres, Kathryn E. R. Dawe, J. Andrew Neuman, Steven S. Brown, Trevor C. VandenBoer, and Cora J. Young
Atmos. Meas. Tech., 14, 5859–5871, https://doi.org/10.5194/amt-14-5859-2021, https://doi.org/10.5194/amt-14-5859-2021, 2021
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This study characterized and validated a commercial spectroscopic instrument for the measurement of hydrogen chloride (HCl) in the atmosphere. Near the Earth’s surface, HCl acts as the dominant reservoir for other chlorine-containing reactive chemicals that play an important role in atmospheric chemistry. The properties of HCl make it challenging to measure. This instrument can overcome many of these challenges, enabling reliable HCl measurements.
Marvin Glowania, Franz Rohrer, Hans-Peter Dorn, Andreas Hofzumahaus, Frank Holland, Astrid Kiendler-Scharr, Andreas Wahner, and Hendrik Fuchs
Atmos. Meas. Tech., 14, 4239–4253, https://doi.org/10.5194/amt-14-4239-2021, https://doi.org/10.5194/amt-14-4239-2021, 2021
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Three instruments that use different techniques to measure gaseous formaldehyde concentrations were compared in experiments in the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich. The results demonstrated the need to correct the baseline in measurements by instruments that use the Hantzsch reaction or make use of cavity ring-down spectroscopy. After applying corrections, all three methods gave accurate and precise measurements within their specifications.
Attilio Naccarato, Antonella Tassone, Maria Martino, Sacha Moretti, Antonella Macagnano, Emiliano Zampetti, Paolo Papa, Joshua Avossa, Nicola Pirrone, Michelle Nerentorp, John Munthe, Ingvar Wängberg, Geoff W. Stupple, Carl P. J. Mitchell, Adam R. Martin, Alexandra Steffen, Diana Babi, Eric M. Prestbo, Francesca Sprovieri, and Frank Wania
Atmos. Meas. Tech., 14, 3657–3672, https://doi.org/10.5194/amt-14-3657-2021, https://doi.org/10.5194/amt-14-3657-2021, 2021
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Mercury monitoring in support of the Minamata Convention requires effective and reliable analytical tools. Passive sampling is a promising approach for creating a sustainable long-term network for atmospheric mercury with improved spatial resolution and global coverage. In this study the analytical performance of three passive air samplers (CNR-PAS, IVL-PAS, and MerPAS) was assessed over extended deployment periods and the accuracy of concentrations was judged by comparison with active sampling.
Mei Bai, José I. Velazco, Trevor W. Coates, Frances A. Phillips, Thomas K. Flesch, Julian Hill, David G. Mayer, Nigel W. Tomkins, Roger S. Hegarty, and Deli Chen
Atmos. Meas. Tech., 14, 3469–3479, https://doi.org/10.5194/amt-14-3469-2021, https://doi.org/10.5194/amt-14-3469-2021, 2021
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The development and validation of management practices to mitigate methane (CH4) emissions from livestock require accurate emission measurements. We compared the inverse dispersion modelling (IDM) and tracer-ratio techniques to measure CH4 emissions from cattle. Both measurements agreed well but were higher than IPCC estimates. We suggest that the IDM approach can provide an accurate method of estimating cattle emissions, and IPCC estimates may have larger uncertainties.
Yuan You, Ralf M. Staebler, Samar G. Moussa, James Beck, and Richard L. Mittermeier
Atmos. Meas. Tech., 14, 1879–1892, https://doi.org/10.5194/amt-14-1879-2021, https://doi.org/10.5194/amt-14-1879-2021, 2021
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Tailings ponds in the Alberta oil sands can be significant sources of methane, an important greenhouse gas. This paper describes a 1-month study conducted in 2017 to measure methane emissions from a pond using a variety of micrometeorological flux methods and demonstrates some advantages of these methods over flux chambers.
Christoph Häni, Marcel Bühler, Albrecht Neftel, Christof Ammann, and Thomas Kupper
Atmos. Meas. Tech., 14, 1733–1741, https://doi.org/10.5194/amt-14-1733-2021, https://doi.org/10.5194/amt-14-1733-2021, 2021
Seth Kutikoff, Xiaomao Lin, Steven R. Evett, Prasanna Gowda, David Brauer, Jerry Moorhead, Gary Marek, Paul Colaizzi, Robert Aiken, Liukang Xu, and Clenton Owensby
Atmos. Meas. Tech., 14, 1253–1266, https://doi.org/10.5194/amt-14-1253-2021, https://doi.org/10.5194/amt-14-1253-2021, 2021
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Fast-response infrared gas sensors have been used over 3 decades for long-term monitoring of water vapor fluxes. As optically improved infrared gas sensors are newly employed, we evaluated the performance of water vapor density and water vapor flux from three generations of infrared gas sensors in Bushland, Texas, USA. From our experiments, fluxes from the old sensors were best representative of evapotranspiration based on a world-class lysimeter reference measurement.
Yuan You, Samar G. Moussa, Lucas Zhang, Long Fu, James Beck, and Ralf M. Staebler
Atmos. Meas. Tech., 14, 945–959, https://doi.org/10.5194/amt-14-945-2021, https://doi.org/10.5194/amt-14-945-2021, 2021
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Tailings ponds in the Alberta oil sands represent an insufficiently characterized source of fugitive emissions of pollutants to the atmosphere. In this study, a novel approach of using a Fourier transform infrared spectrometer along with measurements of atmospheric turbulence is shown to present a practical, non-intrusive method of quantifying emission rates for ammonia, alkanes, and methane. Results from a 1-month field study are presented and discussed.
Ravi Sahu, Ayush Nagal, Kuldeep Kumar Dixit, Harshavardhan Unnibhavi, Srikanth Mantravadi, Srijith Nair, Yogesh Simmhan, Brijesh Mishra, Rajesh Zele, Ronak Sutaria, Vidyanand Motiram Motghare, Purushottam Kar, and Sachchida Nand Tripathi
Atmos. Meas. Tech., 14, 37–52, https://doi.org/10.5194/amt-14-37-2021, https://doi.org/10.5194/amt-14-37-2021, 2021
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A unique feature of our low-cost sensor deployment is a swap-out experiment wherein four of the six sensors were relocated to different sites in the two phases. The swap-out experiment is crucial in investigating the efficacy of calibration models when applied to weather and air quality conditions vastly different from those present during calibration. We developed a novel local calibration algorithm based on metric learning that offers stable and accurate calibration performance.
Michal Vojtisek-Lom, Alessandro A. Zardini, Martin Pechout, Lubos Dittrich, Fausto Forni, François Montigny, Massimo Carriero, Barouch Giechaskiel, and Giorgio Martini
Atmos. Meas. Tech., 13, 5827–5843, https://doi.org/10.5194/amt-13-5827-2020, https://doi.org/10.5194/amt-13-5827-2020, 2020
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The feasibility of monitoring on-road emissions from small motorcycles with two highly compact portable emissions monitoring systems was evaluated on three motorcycles, with positive results. Mass emissions measured on the road were consistent among repeated runs, with differences between laboratory and on-road tests much larger than those between portable and laboratory systems, which were, on the average, within units of percent over standard test cycles.
Xiaoyu Sun, Minzheng Duan, Yang Gao, Rui Han, Denghui Ji, Wenxing Zhang, Nong Chen, Xiangao Xia, Hailei Liu, and Yanfeng Huo
Atmos. Meas. Tech., 13, 3595–3607, https://doi.org/10.5194/amt-13-3595-2020, https://doi.org/10.5194/amt-13-3595-2020, 2020
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The accurate measurement of greenhouse gases and their vertical distribution in the atmosphere is significant to the study of climate change and satellite remote sensing. Carbon dioxide and methane between 0.6 and 7 km were measured by the aircraft King Air 350ER in Jiansanjiang, northeast China, on 7–11 August 2018. The profiles show strong variation with the altitude and time, so the vertical structure of gases should be taken into account in the current satellite retrieval algorithm.
Paul A. Solomon, Dena Vallano, Melissa Lunden, Brian LaFranchi, Charles L. Blanchard, and Stephanie L. Shaw
Atmos. Meas. Tech., 13, 3277–3301, https://doi.org/10.5194/amt-13-3277-2020, https://doi.org/10.5194/amt-13-3277-2020, 2020
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Analyzing street-level air pollutants (2016–2017), this assessment indicates that mobile measurement is precise and accurate (5 % to 25 % bias) relative to regulatory sites, with higher spatial resolution. Collocated sensor measurements in California showed differences less than 20 %, suggesting that greater differences represent spatial variability. Mobile data confirm regulatory-site spatial representation and that pollutant levels can also be 6 to 8 times higher just blocks apart.
Christian Juncher Jørgensen, Jacob Mønster, Karsten Fuglsang, and Jesper Riis Christiansen
Atmos. Meas. Tech., 13, 3319–3328, https://doi.org/10.5194/amt-13-3319-2020, https://doi.org/10.5194/amt-13-3319-2020, 2020
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Recent discoveries have shown large emissions of methane (CH4) to the atmosphere from meltwater at the Greenland ice sheet (GrIS). Low-cost and low-power gas sensor technology offers great potential to supplement CH4 measurements using very expensive reference analyzers under harsh and remote conditions. In this paper we evaluate the in situ performance at the GrIS of a low-cost CH4 sensor to a state-of-the-art analyzer and find very excellent agreement between the two methods.
Lilian Joly, Olivier Coopmann, Vincent Guidard, Thomas Decarpenterie, Nicolas Dumelié, Julien Cousin, Jérémie Burgalat, Nicolas Chauvin, Grégory Albora, Rabih Maamary, Zineb Miftah El Khair, Diane Tzanos, Joël Barrié, Éric Moulin, Patrick Aressy, and Anne Belleudy
Atmos. Meas. Tech., 13, 3099–3118, https://doi.org/10.5194/amt-13-3099-2020, https://doi.org/10.5194/amt-13-3099-2020, 2020
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This article presents an instrument weighing less than 3 kg for accurate and rapid measurement of greenhouse gases between 0 and 30 km altitude using a meteorological balloon. This article shows the interest of these measurements for the validation of simulations of infrared satellite observations.
Jonathan Elsey, Marc D. Coleman, Tom D. Gardiner, Kaah P. Menang, and Keith P. Shine
Atmos. Meas. Tech., 13, 2335–2361, https://doi.org/10.5194/amt-13-2335-2020, https://doi.org/10.5194/amt-13-2335-2020, 2020
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Water vapour is an important component in trying to understand the flows of energy between the Sun and Earth, since it is opaque to radiation emitted by both the surface and the Sun. In this paper, we study how it absorbs sunlight by way of its
continuum, a property which is poorly understood and with few measurements. Our results indicate that this continuum absorption may be more significant than previously thought, potentially impacting satellite observations and climate studies.
Claudia Grossi, Scott D. Chambers, Olivier Llido, Felix R. Vogel, Victor Kazan, Alessandro Capuana, Sylvester Werczynski, Roger Curcoll, Marc Delmotte, Arturo Vargas, Josep-Anton Morguí, Ingeborg Levin, and Michel Ramonet
Atmos. Meas. Tech., 13, 2241–2255, https://doi.org/10.5194/amt-13-2241-2020, https://doi.org/10.5194/amt-13-2241-2020, 2020
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The sustainable support of radon metrology at the environmental level offers new scientific possibilities for the quantification of greenhouse gas (GHG) emissions and the determination of their source terms as well as for the identification of radioactive sources for the assessment of radiation exposure. This study helps to harmonize the techniques commonly used for atmospheric radon and radon progeny activity concentration measurements.
Cheng-Hsien Lin, Richard H. Grant, Albert J. Heber, and Cliff T. Johnston
Atmos. Meas. Tech., 13, 2001–2013, https://doi.org/10.5194/amt-13-2001-2020, https://doi.org/10.5194/amt-13-2001-2020, 2020
Short summary
Short summary
Gas quantification using the open-path Fourier transform infrared spectrometer (OP-FTIR) is subject to interferences of environmental variables, leading to errors in gas concentration calculations. This study investigated the effects of ambient water vapour content, temperature, path lengths, and wind speed on the quantification of N2O and CO2 concentrations, which can help the OP-FTIR users to avoid these errors and improve the precision and accuracy of the atmospheric gas quantification.
Cited articles
Ammann, C. and Meixner, F. X.: Stability dependence of the relaxed eddy accumulation coefficient for various scalar quantities, J. Geophys. Res., 107, ACL7.1–ACL7.9, https://doi.org/10.1029/2001JD000649, 2002.
Ammann, C., Flechard, C. R., Leifeld, J., Neftel, A., and Fuhrer, J.: The carbon budget of newly established temperate grassland depends on management intensity: The Greenhouse Gas Balance of Grasslands in Europe, Agr. Ecosyst. Environ., 121, 5–20, https://doi.org/10.1016/j.agee.2006.12.002, 2007.
Andreas, E. L., Hill, P. W., Gosz, J. R., Moore, D., Otto, W., and Sarma, A.: Statistics of Surface Layer Turbulence over Terrain with Meter-Scale Heterogeneity, Bound.-Lay. Meteorol., 86, 379–409, 1998a.
Andreas, E. L., Hill, R. J., Gosz, J. R., Moore, D. I., Otto, W. D., and Sarma, A. D.: Stability Dependence of the Eddy-Accumulation Coefficients for Momentum and Scalars, Bound.-Lay. Meteorol., 86, 409–420, 1998b.
Aubinet, M., Grelle, A., Ibrom, A., Rannik, Ü., Moncrieff, J., Foken, T., Kowalski, A. S., Martin, P. H., Berbigier, P., Bernhofer, C., Clement, R., Elbers, J. A., Granier, A., Grünwald, T., Morgenstern, K., Pilegaard, K., Rebmann, C., Snijders, W., Valentini, R., and Vesala, T.: Estimates of the Annual Net Carbon and Water Exchange of Forests: The EUROFLUX Methodology, Adv. Ecol. Res., 30, 113–175, 2000.
Aubinet, M., Vesala, T., and Papale, D.: Eddy Covariance, Springer, Dordrecht, Heidelberg, London, New York, 2012.
Baker, J. M., Norman, J. M., and Bland, W. L.: Field-scale application of the flux measurement by conditional sampling, Agr. Forest Meteorol., 62, 31–52, 1992.
Baldocchi, D. D.: Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future, Glob. Change Biol., 9, 479–492, https://doi.org/10.1046/j.1365-2486.2003.00629.x, 2003.
Baldocchi, D. D., Falge, E., Gu, L. H, Olson, R., Hollinger, D. Y., Running, S., Anthoni, P., Bernhofer, C., Davis, K., Evans, R., Fuentes, J., Goldstein, A. H., Katul, G. G., Law, B. E., Lee, X. H., Malhi, Y., Meyers, T. P., Munger, J. W., Oechel, Paw, K. T., Pilegaard, K., Schmid, H. P., Valentini, R., Verma, S., Vesala, T., Wilson, K., and Wofsy, S.: FLUXNET: A new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor, and energy flux densities, B. Am. Meteorol. Soc., 82, 2415–2434, 2001.
Bash, J. O. and Miller, D. R.: A Relaxed Eddy Accumulation System for Measuring Surface Fluxes of Total Gaseous Mercury, J. Atmos. Ocean. Tech., 25, 244–257, https://doi.org/10.1175/2007JTECHA908.1, 2008.
Baum, K. and Ham, J.: Adaptation of a speciation sampling cartridge for measuring ammonia flux from cattle feedlots using relaxed eddy accumulation, Atmos. Environ., 43, 1753–1759, https://doi.org/10.1016/j.atmosenv.2008.12.021, 2009.
Beverland, I. J., Milne, R., Boissard, C., Ónéill, D. H., Moncrieff, J., and Hewitt, C. N.: Measurement of carbon dioxide and hydrocarbon fluxes from a sitka spruce forest using micrometeorological techniques, J. Geophys. Res., 101, 22807–22815, https://doi.org/10.1029/96JD01933, 1996.
Bowling, D. R., Turnipseed, A. A., Delany, A. C., Baldocchi, D. D., Greenberg, J. P., and Monson, R. K.: The use of relaxed eddy accumulation to measure biosphere-atmosphere exchange of isoprene and other biological trace gases, Oecologia, 116, 306–315, 1998
Bowling, D. R., Baldocchi, D. D., and Monson, R. K.: Dynamics of isotopic exchange of carbon dioxide in a Tennessee deciduous forest, Global Biogeochem. Cy., 13, 903–922, 1999a.
Bowling, D. R., Delany, A. C., Turnipseed, A. A., Baldocchi, D. D., and Monson, R. K.: Modification of the relaxed eddy accumulation technique to maximize measured scalar mixing ratio differences in updrafts and downdrafts, J. Geophys. Res.-Atmos., 104, 9121–9133, 1999b.
Bowling, D. R., Tans, P. P., and Monson, R. K.: Partitioning net ecosystem carbon exchange with isotopic fluxes of CO2, Glob. Change Biol., 7, 127–145, https://doi.org/10.1046/j.1365-2486.2001.00400.x, 2001.
Bowling, D. R., Pataki, D. E., and Ehleringer, J. R.: Critical evaluation of micrometeorological methods for measuring ecosystem-atmosphere isotopic exchange of CO2, Agr. Forest Meteorol., 116, 159–179, 2003a.
Bowling, D. R., Sargent, S. D., Tanner, B. D., and Ehleringer, J. R.: Tunable diode laser absorption spectroscopy for stable isotope studies of ecosystem–atmosphere CO2 exchange, Agr. Forest Meteorol., 118, 1–19, https://doi.org/10.1016/S0168-1923(03)00074-1, 2003b.
Brand, W. A.: O2/N2 Storage Aspects and Open Split Mass Spectrometric Determination, in: Proceedings of the 12th WMO/IAEA Meeting of Expert on Carbon Dioxide Concentration and Related Tracers Measurements Techniques, Toronto, Canada, September 2003, edited by: Worthy, D. and Huang, L., WMO-GAW Report 161, 146–151, 2005.
Brand, W. A., Huang, L., Mukai, H., Chivulescu, A., Richter, J. M., and Rothe, M.: How well do we know VPDB? Variability of δ13C and δ18O in CO2 generated from NBS19-calcite, Rapid Commun. Mass Sp., 23, 915–926, https://doi.org/10.1002/rcm.3940, 2009.
Buchmann, N., Kao, W. Y., and Ehleringer, J. R.: Influence of stand structure on 13C of vegetation, soils, and canopy air within deciduous and evergreen forests in Utah, United States, Oecologia, 110, 109–119, 1997.
Buchmann, N., Brooks, J. R., Flanagan, L. B., and Ehleringer, J. R.: Carbon Isotope discrimination of terrestrial ecosystems – How well do observed and modeled results match?, in: Stable Isotopes and the Integration of Biological, edited by: Griffiths, H., Ecological and Geochemical Processes, BIOS Scientific Publishers Ltd., Oxford., 203–221, 1998.
Businger, J. A. and Oncley, S. P.: Flux measurements with conditional sampling, J. Atmos. Ocean. Tech., 7, 349–352, 1990.
Ciais, P., Soussana, J. F., Vuichard, N., Luyssaert, S., Don, A., Janssens, I. A., Piao, S. L., Dechow, R., Lathière, J., Maignan, F., Wattenbach, M., Smith, P., Ammann, C., Freibauer, A., Schulze, E. D., and the CARBOEUROPE Synthesis Team: The greenhouse gas balance of European grasslands, Biogeosciences Discuss., 7, 5997–6050, https://doi.org/10.5194/bgd-7-5997-2010, 2010.
Davidson, E. A., Savage, K., Verchot, L. V., and Navarro, R.: Minimizing artefacts and biases in chamber-based measurements of soil respiration: FLUXNET 2000 Synthesis, Agr. Forest Meteorol., 113, 21–37, https://doi.org/10.1016/S0168-1923(02)00100-4, 2002.
Delany, A. C., Oncley, S. P., Businger, J. A., and Sievering, E.: Adapting the conditional sampling for a range of different chemical species, Seventh symposium on meteorological observations and instruments, Am. Meteorol. Soc., 22–25, 1991.
Desai, A. R., Richardson, A. D., Moffat, A. M., Kattge, J., Hollinger, D. Y., Barr, A., Falge, E., Noormets, A., Papale, D., Reichstein, M., and Stauch, V. J.: Cross-site evaluation of eddy covariance GPP and RE decomposition techniques, Agr. Forest Meteorol., 148, 821–838, https://doi.org/10.1016/j.agrformet.2007.11.012, 2008.
Desjardins, R. L.: Description and evaluation of a sensible heat flux detector, Bound.-Lay. Meteorol., 11, 147–154, https://doi.org/10.1007/BF02166801, 1977.
Dore, S., Hymus, G. J., Johnson, D. P., Hinkle, C. R., Valentini, R., and Drake, B. G.: Cross validation of open-top chamber and eddy covariance measurements of ecosystem CO2 exchange in a Florida scrub-oak ecosystem, Glob. Change Biol., 9, 84–95, https://doi.org/10.1046/j.1365-2486.2003.00561.x, 2003.
Eigenmann, R., Metzger, S., and Foken, T.: Generation of free convection due to changes of the local circulation system, Atmos. Chem. Phys., 9, 8587–8600, https://doi.org/10.5194/acp-9-8587-2009, 2009.
Falge, E., Baldocchi, D. D., Olson, R., Anthoni, P., Aubinet, M., Bernhofer, C., Burba, G., Ceulemans, R., Clement, R., Dolman, H., Granier, A., Gross, P., Grünwald, T., Hollinger, D. Y., Jensen, N.-O., Katul, G. G., Keronen, P., Kowalski, A. S., Lai, C. T., Law, B. E., Meyers, T. P., Moncrieff, J., Moors, E., Munger, J. W., Pilegaard, K., Rannik, Ü., Rebmann, C., Suyker, A., Tenhunen, J. D., Tu, K. P., Verma, S., Vesala, T., Wilson, K., and Wofsy, S.: Gap filling strategies for defensible annual sums of net ecosystem exchange, Agr. Forest Meteorol., 107, 43–69, https://doi.org/10.1016/S0168-1923(00)00225-2, 2001.
Farquhar, G. D., Ehleringer, J. R., and, and Hubick, K. T.: Carbon Isotope Discrimination and Photosynthesis, Annu. Rev. Plant Phys., 40, 503–537, 1989.
Flanagan, L. B., Brooks, J. R., Varney, G. T., Berry, S. C., and Ehleringer, J. R.: Carbon isotope discrimination during photosynthesis and the isotope ratio of respired CO2 in boreal forest ecosystems, Glob. Biogeochem. Cy., 10, 629–640, https://doi.org/10.1029/96GB02345, 1996.
Flechard, C. R., Neftel, A., Jocher, M., Ammann, C., and Fuhrer, J.: Bi-directional soil/atmosphere N2O exchange over two mown grassland systems with contrasting management practices, Glob. Change Biol., 11, 2114–2127, https://doi.org/10.1111/j.1365-2486.2005.01056.x, 2005.
Foken, T.: Micrometeorology, Springer, Berlin, 2008.
Foken, T., Dlugi, R., and Kramm, G.: On the Determination of Dry Deposition and Emission of Gaseous Compounds at the Biosphere–Atmosphere Interface, Meteorol. Z., 4, 91–118, 1995.
Foken, T., Aubinet, M., and Leuning, R.: The eddy-covariance method, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, Dordrecht, Heidelberg, London, New York, 1–19, 2012a.
Foken, T., Leuning, R., Oncley, S. P., Mauder, M., and Aubinet, M.: Corrections and data quality, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, Dordrecht, Heidelberg, London, New York, 85–131, 2012b.
Fotiadi, A., Lohou, F., Druilhet, A., Serça, D., Brunet, Y., and Delmas, R.: Methodological Development of the Conditional Sampling Method. Part I: Sensitivity to Statistical and Technical Characteristics, Bound.-Lay. Meteorol., 114, 615–640, 2005.
Gaman, A., Rannik, Ü., Aalto, P., Pohja, T., Siivola, E., Kulmala, M., and Vesala, T.: Relaxed Eddy Accumulation System for Size-Resolved Aerosol Particle Flux Measurements, J. Atmos. Ocean. Tech., 21, 933–943, 2004.
Gao, W.: The vertical change of coefficient-b, used in the relaxed eddy accumulation method for flux measurement above an within a forest canopy, Atmos. Environ., 29, 2339–2347, 1995.
Ghosh, P., Patecki, M., Rothe, M., and Brand, W. A.: Calcite-CO2 mixed into CO2-free air: a new CO2-in-air stable isotope reference material for the VPDB scale, Rapid Commun. Mass Sp., 19, 1097–1119, https://doi.org/10.1002/rcm.1886, 2005.
Göckede, M., Rebmann, C., and Foken, T.: A combination of quality assessment tools for eddy covariance measurements with footprint modelling for the characterisation of complex sites: Flux and concentration footprints, Agr. Forest Meteorol., 127, 175–188, https://doi.org/10.1016/j.agrformet.2004.07.012, 2004.
Göckede, M., Markkanen, T., Hasager, C. B., and Foken, T.: Update of a footprint-based approach for the characterization of complex measurement sites, Bound.-Lay. Meteorol., 118, 635–655, https://doi.org/10.1007/s10546-005-6435-3, 2006.
Goulden, M. L., Munger, J. W., Fan, S.-M., Daube, B. C., and Wofsy, S.: Measurements of carbon sequestration by long-term eddy covariance: methods and a critical evaluation of accuracy, Glob. Change Biol., 2, 169–182, https://doi.org/10.1111/j.1365-2486.1996.tb00070.x, 1996.
Graus, M., Hansel, A., Wisthaler, A., Lindinger, C., Forkel, R., Hauff, K., Klauer, M., Pfichner, A., Rappenglück, B., and Steigner, D.: A relaxed-eddy-accumulation method for the measurement of isoprenoid canopy-fluxes using an online gas-chromatographic technique and PTR-MS simultaneously, Atmos. Environ., 40, 43–54, https://doi.org/10.1016/j.atmosenv.2005.09.094, 2006.
Griffis, T., Baker, J., Sargent, S., Tanner, B., and Zhang, J.: Measuring field-scale isotopic CO2 fluxes with tunable diode laser absorption spectroscopy and micrometeorological techniques, Agr. Forest Meteorol., 124, 15–29, https://doi.org/10.1016/j.agrformet.2004.01.009, 2004.
Griffis, T. J., Sargent, S. D., Baker, J. M., Lee, X., Tanner, B. D., Greene, J., Swiatek, E., and Billmark, K.: Direct measurement of biosphere-atmosphere isotopic CO2 exchange using the eddy covariance technique, J. Geophys. Res., 113, D08304, https://doi.org/10.1029/2007JD009297, 2008.
Grönholm, T., Aalto, P., Hiltunen, V., Rannik, Ü., Rinne, J., Laakso, L., Hyvönen, S., Vesala, T., and Kulmala, M.: Measurements of aerosol particle dry deposition velocity using the relaxed eddy accumulation technique, Tellus B, 59, 381–386, https://doi.org/10.1111/j.1600-0889.2007.00268.x, 2007.
Haapanala, S., Rinne, J., Pystynen, K.-H., Hellén, H., Hakola, H., and Riutta, T.: Measurements of hydrocarbon emissions from a boreal fen using the REA technique, Biogeosciences, 3, 103–112, https://doi.org/10.5194/bg-3-103-2006, 2006.
Held, A., Patton, E., Rizzo, L., Smith, J., Turnipseed, A. A., and Guenther, A.: Relaxed Eddy Accumulation Simulations of Aerosol Number Fluxes and Potential Proxy Scalars, Bound.-Lay. Meteorol., 129, 451–468, https://doi.org/10.1007/s10546-008-9327-5, 2008.
Hensen, A., Nemitz, E., Flynn, M. J., Blatter, A., Jones, S. K., Sørensen, L. L., Hensen, B., Pryor, S. C., Jensen, B., Otjes, R. P., Cobussen, J., Loubet, B., Erisman, J. W., Gallagher, M. W., Neftel, A., and Sutton, M. A.: Inter-comparison of ammonia fluxes obtained using the Relaxed Eddy Accumulation technique, Biogeosciences, 6, 2575–2588, https://doi.org/10.5194/bg-6-2575-2009, 2009.
Kaimal, J. C., Wyngaard, J. C., Izumi, Y., and Cotè, O.: Spectral characteristics of surface-layer turbulence, Q. J. Roy. Meteorol. Soc., 98, 563–589, 1972.
Katul, G. G., Finkelstein, P. L., Clarke, J. F., and Ellestad, T. G.: An investigation of the conditional sampling method used to estimate fluxes of active, reactive, and passive scalars, J. Appl Meteorol., 35, 1835–1845, 1996.
Katul, G. G. and Hsieh, C.-I.: A note on the flux-variance similarity relationships for heat and water vapour in the unstable atmospheric surface layer, Bound.-Lay. Meteorol., 90, 327–338, 1999.
Katul, G. G., Hsieh, C.-I., Bowling, D. R., Clark, K., Shurpali, N., Turnipseed, A. A., Albertson, J., Tu, K. P., Hollinger, D. Y., Evans, B., Offerle, B., Anderson, D., Ellsworth, D., Vogel, C., and Oren, R.: Spatial variability of turbulent fluxes in the roughness sublayer of an even-aged pine forest Bound.-Lay. Meteorol., 93, 1–28, https://doi.org/10.1023/A:1002079602069, 1999.
Keeling, C.: The concentrations and isotopic abundances of atmospheric carbon dioxide in rural areas, Geochim. Cosmochim. Ac., 13, 322–334, 1958.
Kimball, B. and Lemon, E. R.: Air Turbulence Effects upon Soil Gas Exchange, Soil Sci. Soc. Am. J., 35, 16–21, 1971.
Kirita, H.: Re-examination of the absorption method of measuring soil respira tion under field conditions III. Combined effect of the covered ground area and the surface area of KOH solution on CO2-absorption rates, Jap. J. Ecol., 21, 37–42, 1971.
Knohl, A. and Buchmann, N.: Partitioning the net CO2 flux of a deciduous forest into respiration and assimilation using stable carbon isotopes, Global Biogeochem. Cy., 19, GB4008, https://doi.org/10.1029/2004GB002301, 2005.
Kuzyakov, Y. and Gavrichkova, O.: Time lag between photosynthesis and carbon dioxide efflux from soil: a review of mechanisms and controls, Glob. Change Biol., 16, 3386–3406, https://doi.org/10.1111/j.1365-2486.2010.02179.x, 2010.
Lasslop, G., Reichstein, M., Papale, D., Richardson, A. D., Arneth, A., Barr, A., Stoy, P. C., and Wohlfahrt, G.: Separation of net ecosystem exchange into assimilation and respiration using a light response curve approach: critical issues and global evaluation, Glob. Change Biol., 16, 187–208, https://doi.org/10.1111/j.1365-2486.2009.02041.x, 2010.
Lee, A., Schade, G. W., Holzinger, R., and Goldstein, A. H.: A comparison of new measurements of total monoterpene flux with improved measurements of speciated monoterpene flux, Atmos. Chem. Phys., 5, 505–513, https://doi.org/10.5194/acp-5-505-2005, 2005.
Lloyd, J. and Taylor, J.: On the temperature dependence of soil respiration, Funct. Ecol., 8, 315–323, 1994.
Lloyd, J., Kruijt, B., Hollinger, D. Y., Grace, J., Francey, R. J., Wong, S. C., Kelliher, F. M., Miranda, A. C., Farquhar, G. D., Gash, J. H., Vygodskaya, N. N., Wright, I. R., Miranda, H. S., and Schulze, E. D.: Vegetation effects on the isotopic composition of atmospheric CO2 at local and regional scales: Theoretical aspects and a comparison between rain forest in Amazonia and a boreal forest in Siberia, Aust. J. Plant Physiol., 23, 371–399, https://doi.org/10.1071/PP9960371, 1996.
Lundegardh, H.: Ecological studies in the assimilation of certain forest plants and shore plants, Svensk Botaniska Tidskrift, 46–94, 1921.
Mauder, M. and Foken, T.: Documentation and instruction manual of the eddy covariance software package TK2, Univ. Bayreuth, Dep. of Mikrometeorol., ISSN: 1614-89166, 26, 42 pp., 2004.
Mauder, M. and Foken, T.: Documentation and instruction manual of the eddy covariance software package TK3, Univ. Bayreuth, Dep. of Mikrometeorol., ISSN: 1614-89166, 46, 58 pp., 2011.
Mauder, M., Liebethal, C., Göckede, M., Leps, J.-P., Beyrich, F., and Foken, T.: Processing and quality control of flux data during LITFASS-2003, Bound.-Lay. Meteorol., 121, 67–88, https://doi.org/10.1007/s10546-006-9094-0, 2006.
Mauder, M., Oncley, S. P., Vogt, R., Weidinger, T., Ribeiro, L., Bernhofer, C., Foken, T., Kohsiek, W., Bruin, H. A. R., and Liu, H.: The energy balance experiment EBEX-2000. Part II: Intercomparison of eddy-covariance sensors and post-field data processing methods, Bound.-Lay. Meteorol., 123, 29–54, https://doi.org/10.1007/s10546-006-9139-4, 2007.
Mauder, M., Foken, T., Clement, R., Elbers, J. A., Eugster, W., Grünwald, T., Heusinkveld, B., and Kolle, O.: Quality control of CarboEurope flux data – Part 2: Inter-comparison of eddy-covariance software, Biogeosciences, 5, 451–462, https://doi.org/10.5194/bg-5-451-2008, 2008.
Meyers, T. P., Luke, W., and Meisinger, J.: Fluxes of ammonia and sulfate over maize using relaxed eddy accumulation, Agr. Forest Meteorol., 136, 203–213, https://doi.org/10.1016/j.agrformet.2004.10.005, 2006.
Michaelis, L. and Menten, M. L.: Die Kinetik der Invertinwirkung, Kinetics of the invertin reaction, Biochem. Z., 49, 333–369, 1913.
Moncrieff, J., Valentini, R., Greco, S., Seufert, G., and Ciccioli, P.: Trace gas exchange over terrestrial ecosystems: Methods and perspectives in micrometeorology, J. Exp. Bot., 48, 1133–1142, 1997.
Moncrieff, J., Beverland, I. J., O'Neill, D. H., and Cropley, F. D.: Controls on trace gas exchange observed by a conditional sampling method, Atmos. Environ., 32, 3265–3274, 1998.
Myles, L., Meyers, T. P., and Robinson, L.: Relaxed eddy accumulation measurements of ammonia, nitric acid, sulfur dioxide and particulate sulfate dry deposition near Tampa, FL, USA, Environ. Res. Lett., 2, 34004, https://doi.org/10.1088/1748-9326/2/3/034004, 2007.
Nemitz, E., Flynn, M. J., Williams, P. I., Milford, C., Theobald, M. R., Blatter, A., Gallagher, M. W., and Sutton, M. A.: A Relaxed Eddy Accumulation System for the Automated Measurement of Atmospheric Ammonia Fluxes, Water Air Soil Poll., 1, 189–202, https://doi.org/10.1023/A:1013103122226, 2001.
Oberdorfer, E.: Pflanzensoziologische Exkursionsflora für Deutschland und angrenzende Gebiete, 8th Edn., Ulmer, Stuttgart (Hohenheim), 1051 S, 2001.
Ogée, J., Peylin, P., Ciais, P., Bariac, T., Brunet, Y., Berbigier, P., Roche, C., Richard, P., Bardoux, G., and Bonnefond, J.: Partitioning net ecosystem carbon exchange into net assimilation and respiration using 13CO2 measurements: A cost-effective sampling strategy, Global Biogeochem. Cy., 17, 1070, https://doi.org/10.1029/2002GB001995, 2003.
Ogée, J., Peylin, P., Cuntz, M., Bariac, T., Brunet, Y., Berbigier, P., Richard, P., and Ciais, P.: Partitioning net ecosystem carbon exchange into net assimilation and respiration with canopy-scale isotopic measurements: An error propagation analysis with 13CO2 and CO18O data, Global Biogeochem. Cy., 18, GB2019, https://doi.org/10.1029/2003GB002166, 2004.
Oncley, S. P., Delany, A. C., Horst, T. W., and Tans, P. P.: Verification of flux measurement using relaxed eddy accumulation, Athmos. Environ. A-Gen., 27, 2417–2426, 1993.
Papale, D.: Data gap filling, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, Dordrecht, Heidelberg, London, New York, 159–172, 2012.
Pataki, D. E.: The application and interpretation of Keeling plots in terrestrial carbon cycle research, Global Biogeochem. Cy., 17, 1022, https://doi.org/10.1029/2001GB001850, 2003.
Pattey, E., Desjardins, R. L., and Rochette, P.: Accuracy of the relaxed eddy-accumulation technique, evaluated using CO2 flux measurements, Bound.-Lay. Meteorol., 66, 341–355, https://doi.org/10.1007/BF00712728, 1993.
Pearson, R. J., Oncley, S. P., and Delany, A. C.: A scalar similarity study based on surface layer ozone measurements over cotton during the California Ozone Deposition Experiment, J. Geophys. Res., 103, 18919–18926, https://doi.org/10.1029/98JD01479, 1998.
Pumpanen, J., Kolari, P., Ilvesniemi, H., Minkkinen, K., Vesala, T., Niinistö, S., Lohila, A., Larmola, T., Morero, M., Pihlatie, M., Janssens, I., Yuste, J. C., Grünzweig, J. M., Reth, S., Subke, J.-A., Savage, K., Kutsch, W., Østreng, G., Ziegler, W., Anthoni, P., Lindroth, A., and Hari, P.: Comparison of different chamber techniques for measuring soil CO2 efflux, Agr. Forest Meteorol., 123, 159–176, https://doi.org/10.1016/j.agrformet.2003.12.001, 2004.
Rannik, Ü., Sogachev, A., Foken, T., Göckede, M., Kljun, N., Leclerc, M. Y., and Vesala, T.: Footprint Analysis, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer Netherlands, Dordrecht, 211–261, 2012.
Rebmann, C., Kolle, O., Heinesch, B., Queck, R., Ibrom, A., and Aubinet, M.: Data Acquisition and Flux Calculations, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, Data Acquisition and Flux Calculations, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, Dordrecht, Heidelberg, London, New York, 263–289, 2012.
Reichstein, M., Falge, E., Baldocchi, D., Papale, D., Aubinet, M., Berbigier, P., Bernhofer, C., Buchmann, N., Gilmanov, T., Granier, A., Grunwald, T., Havrankova, K., Ilvesniemi, H., Janous, D., Knohl, A., Laurila, T., Lohila, A., Loustau, D., Matteucci, G., Meyers, T., Miglietta, F., Ourcival, J.-M., Pumpanen, J., Rambal, S., Rotenberg, E., Sanz, M., Tenhunen, J., Seufert, G., Vaccari, F., Vesala, T., Yakir, D., and Valentini, R.: On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm, Glob. Change Biol., 11, 1424–1439, https://doi.org/10.1111/j.1365-2486.2005.001002.x, 2005.
Reichstein, M., Stoy, P. C., Desai, A. R., Lasslop, G., and Richardson, A. D.: Partitioning of net fluxes, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, Partitioning of net fluxes, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, Dordrecht, Heidelberg, London, New York, 263–289, 2012.
Ren, X., Sanders, J. E., Rajendran, A., Weber, R. J., Goldstein, A. H., Pusede, S. E., Browne, E. C., Min, K.-E., and Cohen, R. C.: A relaxed eddy accumulation system for measuring vertical fluxes of nitrous acid, Atmos. Meas. Tech., 4, 2093–2103, https://doi.org/10.5194/amt-4-2093-2011, 2011.
Riederer, M., Serafimovich, A., and Foken, T.: Net ecosystem CO2 exchange measurements by the closed chamber method and the eddy covariance technique and their dependence on atmospheric conditions, Atmos. Meas. Tech., 7, 1057–1064, https://doi.org/10.5194/amt-7-1057-2014, 2014.
Rochette, P. and Hutchinson, G. L.: Measurement of Soil Respiration in situ: Chamber Techniques, in: Micrometeorology in agricultural systems, edited by: Hatfield, J. L. and Baker, J. M., American Society of Agronomy; Crop Science Society of America; Soil Science Society of America, Madison, Wisconsin, 247–287, 2005.
Rothe, M., Jordan, A., and Brand, W. A.: Trace gases, 13C and 18O of CO2-in-air samples: Storage in glass flasks using PCTFE seals and other effects, in: Proceedings of the 12th WMO/IAEA Meeting of Expert on Carbon Dioxide Concentration and Related Tracers Measurements Techniques, Toronto, Canada, September 2003, edited by: Worthy, D. and Huang, L., WMO-GAW Report 161, 64–70, 2005.
Ruppert, J.: ATEM software for atmospheric turbulent exchange measurements using eddy covariance and relaxed eddy accumulation systems: Bayreuth whole-air REA system setup, Universität Bayreuth, Abt. Mikrometeorologie, Print, ISSN 1614-8916, Arbeitsergebnisse 28, 29 S, 2005.
Ruppert, J.: CO2 and isotope flux measurements above a spruce forest: PhD-Thesis, University of Bayreuth, online publication: urn:nbn:de:bvb:703-opus-5419, 166 pp., 2008.
Ruppert, J., Mauder, M., Thomas, C., and Lüers, J.: Innovative gap-filling strategy for annual sums of CO2 net ecosystem exchange, Agr. Forest Meteorol., 138, 5–18, https://doi.org/10.1016/j.agrformet.2006.03.003, 2006a.
Ruppert, J., Thomas, C., and Foken, T.: Scalar Similarity for Relaxed Eddy Accumulation Methods, Bound.-Lay. Meteorol., 120, 39–63, https://doi.org/10.1007/s10546-005-9043-3, 2006b.
Ruppert, J., Riederer, M., Brand, W. A., and Foken, T.: Whole-air relaxed eddy accumulation for the measurement of isotope and trace-gas fluxes, Univ. Bayreuth, Dep. of Micrometeorol., ISSN 1614-8916, 51, 2012.
Singh, J. and Gupta, S. R.: Plant decomposition and soil respiration in terrestrial eco-systems, Bot. Rev., 450–511, 1977.
Soussana, J. F. and Lüscher, A.: Temperate grasslands and global atmospheric change: a review, Grass Forage Sci., 62, 127–134, https://doi.org/10.1111/j.1365-2494.2007.00577.x, 2007.
Stoy, P. C., Katul, G. G., Siqueira, M. B., Juang, J.-Y., Novick, K. A., Uebelherr, J. M., and Oren, R.: An evaluation of models for partitioning eddy covariance-measured net ecosystem exchange into photosynthesis and respiration, Agr. Forest Meteorol., 141, 2–18, https://doi.org/10.1016/j.agrformet.2006.09.001, 2006.
Sturm, P., Leuenberger, M., Sirignano, C., Neubert, R. E., Meijer, H. A., Langenfelds, R., Brand, W. A., and Tohjima, Y.: Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling, J. Geophys. Res. Atmos., 109, https://doi.org/10.1029/2003JD004073, 2004.
Sturm, P., Eugster, W., and Knohl, A.: Eddy covariance measurements of CO2 iso-topologues with a quantum cascade laser absorption spectrometer, Agr. Forest Meteorol., 152, 73–82, 2012.
Subke, J.-A. and Tenhunen, J. D.: Direct measurements of CO2 flux below a spruce forest canopy, Agr. Forest Meteorol., 126, 157–168, https://doi.org/10.1016/j.agrformet.2004.06.007, 2004.
Thomas, C. and Foken, T.: Flux contribution of coherent structures and its implications for the exchange of energy and matter in a tall spruce canopy, Bound.-Lay. Meteorol., 123, 317–337, https://doi.org/10.1007/s10546-006-9144-7, 2007.
Wehr, R., Munger, J., Nelson, D. D., McManus, J. B., Zahniser, M. S., Wofsy, S. C., and Saleska, S. R.: Long-term eddy covariance measurements of the isotopic composition of the ecosystem–atmosphere exchange of CO2 in a temperate forest, Agr. Forest Meteorol., 181, 69–84, 2013.
Wendeberg, M., Richter, J. M., Rothe, M., and Brand, W. A.: δ 18O anchoring to VPDB: calcite digestion with 18O-adjusted ortho-phosphoric acid, Rapid Commun. Mass Sp., 25, 851–860, https://doi.org/10.1002/rcm.4933, 2011.
Werner, R. A., Rothe, M., and Brand, W. A.: Extraction of CO2 from air samples for isotopic analysis and limits to ultra high precision 18O determination in CO2 gas, Rapid Commun. Mass Sp., 15, 2152–2167, 2001.
Wichura, B.: Untersuchungen zum Kohlendioxid-Austausch über einem Fichtenwaldbestand auf der Grundlage von Hyperbolic-Relaxed-Eddy-Accumulation Messungen für das stabile Kohlenstoffisotop 13C und von Waveletanalysen. Dissertation, Bayreuther Forum Ökologie, Band 114, 324 pp., 2009.
Wichura, B., Ruppert, J., Delany, A. C., Buchmann, N., and Foken, T.: Structure of carbon dioxide exchange processes above a spruce forest, in: Biogeochemistry of forested catchments in a changing environment, a German case study, Ecological Studies, edited by: Matzner, E., Springer, Berlin, Heidelberg, 161–176., 2004.
Wilczak, J. M., Oncley, S. P., and Stage, S. A.: Sonic anemometer tilt correction algorithms, Bound.-Lay. Meteorol., 99, 127–150, 2001.
Williams, C. A., Scanlon, T. M., and Albertson, J. D.: Influence of surface heterogeneity on scalar dissimilarity in the roughness sublayer, Bound.-Lay. Meteorol., 122, 149–165, https://doi.org/10.1007/s10546-006-9097-x, 2007.
Wyngaard, J. C. and Moeng, C. H.: Parameterizing turbulent-diffusion through the joint probability densitiy, Bound.-Lay. Meteorol., 60, 1–13, 1992.
Yakir, D. and Wang, X.-F.: Fluxes of CO2 and water between terrestrial vegetation and the atmosphere estimated from isotope measurements, Nature, 380, 515–517, https://doi.org/10.1038/380515a0, 1996.
Zobitz, J., Keener J. P., Schnyder, H., and Bowling, D. R: Sensitivity analysis and quantification of uncertainty for isotopic mixing relationships in carbon cycle research, Agr. Forest Meteorol., 136, 56–75, 2006.
Short summary
The REA technique cannot be applied on grassland shortly after management without the risk of REA-flux errors due to large uncertainties of b-factors and lacking scalar similarity.
The NEE flux partitioning model based on REA measurement results is complex but can enhance results of common partitioning by considering ecosystem discrimination of 13C and wind velocity.
The REA technique cannot be applied on grassland shortly after management without the risk of...
