Articles | Volume 14, issue 5
https://doi.org/10.5194/amt-14-3597-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-14-3597-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 May 2021
Research article |
| 19 May 2021
| 19 May 2021
In situ observations of stratospheric HCl using three-mirror integrated cavity output spectroscopy
Jordan Wilkerson
CORRESPONDING AUTHOR
Department of Chemistry and Chemical Biology, Harvard University,
Cambridge, MA 02138, USA
David S. Sayres
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Jessica B. Smith
Department of Earth and Planetary Sciences, Harvard University, 12
Oxford Street, Cambridge, MA 02138, USA
Norton Allen
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Marco Rivero
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Mike Greenberg
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Terry Martin
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
James G. Anderson
Department of Chemistry and Chemical Biology, Harvard University,
Cambridge, MA 02138, USA
Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Department of Earth and Planetary Sciences, Harvard University, 12
Oxford Street, Cambridge, MA 02138, USA
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As frozen soil, called permafrost, increasingly thaws over the years, scientists have put much effort into understanding how this may increase carbon emissions, which would exacerbate climate change. Our work supports the emerging view that these efforts should also include nitrous oxide (N2O), a more potent greenhouse gas. Using a low-flying aircraft to study thousands of acres of Alaskan permafrost, we observed average N2O emissions higher than typically assumed for regions such as this.
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Water molecules comes in several varieties, of which H216O is the most common. These varieties behave differently enough under freezing to create strong changes in the ratio of heavy to light water molecules. Here we compare observations of these ratios from satellites and high-altitude airborne instruments. These observations provide information about how air reaches the upper parts of the atmosphere, so it is important to reconcile difference between different modes of observations.
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In situ airborne observations of ongoing tropopause-overshooting convection and an above-anvil cirrus plume from the 31 May 2022 flight of the Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) field campaign are examined. Upper troposphere and lower stratosphere composition changes are evaluated along with possible contributing dynamical and physical processes. Measurements reveal multiple changes in air mass composition and stratospheric hydration throughout the flight.
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Convection in the Asian monsoon provides an important pathway for the transport of boundary layer and tropospheric air, and potentially pollution and chemically active species, into the stratosphere. We analyzed the distribution of the fastest and deepest convection with geostationary satellite detections for the months of May through October of 2017. We find significant differences in the geographic and monthly distributions of cross-tropopause convection across the Asian monsoon region.
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Atmos. Chem. Phys., 19, 4257–4268, https://doi.org/10.5194/acp-19-4257-2019, https://doi.org/10.5194/acp-19-4257-2019, 2019
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As frozen soil, called permafrost, increasingly thaws over the years, scientists have put much effort into understanding how this may increase carbon emissions, which would exacerbate climate change. Our work supports the emerging view that these efforts should also include nitrous oxide (N2O), a more potent greenhouse gas. Using a low-flying aircraft to study thousands of acres of Alaskan permafrost, we observed average N2O emissions higher than typically assumed for regions such as this.
David S. Sayres, Ronald Dobosy, Claire Healy, Edward Dumas, John Kochendorfer, Jason Munster, Jordan Wilkerson, Bruce Baker, and James G. Anderson
Atmos. Chem. Phys., 17, 8619–8633, https://doi.org/10.5194/acp-17-8619-2017, https://doi.org/10.5194/acp-17-8619-2017, 2017
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Arctic temperatures have risen faster than the global average, causing the depth of melting of the frozen ground to increase. Previously frozen organic carbon, once exposed to air, water, and microbes, is turned into carbon dioxide and methane, both of which are important greenhouse gases. Due to the large and varied surface area of the Arctic and the difficulty of making measurements there we use a low flying aircraft (<25 m) to measure the amount of methane released from different regions.
Related subject area
Subject: Gases | Technique: In Situ Measurement | Topic: Instruments and Platforms
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Takuji Sugidachi, Masatomo Fujiwara, Kensaku Shimizu, Shin-Ya Ogino, Junko Suzuki, and Ruud J. Dirksen
Atmos. Meas. Tech., 18, 509–531, https://doi.org/10.5194/amt-18-509-2025, https://doi.org/10.5194/amt-18-509-2025, 2025
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A Peltier-based chilled-mirror hygrometer, SKYDEW, has been developed to measure tropospheric and stratospheric water vapor. Continuous accurate measurements of water vapor are essential for climate monitoring. More than 40 soundings with SKYDEW have been conducted since 2011 to evaluate the performance. The result of soundings at tropical and midlatitudes demonstrated that SKYDEW is able to measure up to an altitude of 20–25 km for daytime soundings and above 25 km for nighttime soundings.
Johannes C. Laube, Tanja J. Schuck, Huilin Chen, Markus Geldenhuys, Steven van Heuven, Timo Keber, Maria Elena Popa, Elinor Tuffnell, Bärbel Vogel, Thomas Wagenhäuser, Alessandro Zanchetta, and Andreas Engel
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A large balloon was launched in summer 2021 in the Arctic to carry instruments for trace gas measurements up to 32 km, above the reach of aircraft. The main aims were to evaluate different techniques and atmospheric processes. We focus on halogenated greenhouse gases and ozone-depleting substances. For this, air was collected with the AirCore technique and a cryogenic air sampler and measured after the flight. A companion paper reports observations of major greenhouse gases.
Cort L. Zang and Megan D. Willis
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Emily D. Wein, Lars E. Kalnajs, and Darin W. Toohey
Atmos. Meas. Tech., 17, 7097–7107, https://doi.org/10.5194/amt-17-7097-2024, https://doi.org/10.5194/amt-17-7097-2024, 2024
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We describe a low-cost and small research-grade spectrometer for measurements of water vapor in the boundary layer. The instrument uses small Arduino microcontrollers and inexpensive laser diodes to reduce cost while maintaining high performance comparable to more expensive instruments. Performance was assessed with intercomparisons between commercially available instruments outdoors. The design's simplicity, performance, and price point allow it to be accessible to a variety of users.
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Atmos. Meas. Tech., 17, 6625–6645, https://doi.org/10.5194/amt-17-6625-2024, https://doi.org/10.5194/amt-17-6625-2024, 2024
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This study presents direct flux measurements in tall towers using existing slow-response analysers and adding 3D sonic anemometers. This way, we can significantly improve greenhouse gas monitoring with little extra instrumental effort. Slow-response analysers may be used here as the relevant frequency ranges depend on measuring height. Tall towers offer a large footprint, amplifying spatial coverage. The presented concept is a valuable bridge between atmospheric and ecosystem communities.
Kristen Okorn and Laura T. Iraci
Atmos. Meas. Tech., 17, 6425–6457, https://doi.org/10.5194/amt-17-6425-2024, https://doi.org/10.5194/amt-17-6425-2024, 2024
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We reviewed 60 sensor networks and 17 related efforts (sensor review papers and data accessibility projects) to better understand the landscape of stationary low-cost gas-phase sensor networks deployed in outdoor environments worldwide. Gaps in monitoring efforts include the availability of gas-phase measurements compared to particulate matter (PM) and geographic coverage gaps (the Global South, rural areas). We conclude with a summary of cross-network unification and quality control efforts.
Henning Finkenzeller, Jyri Mikkilä, Cecilia Righi, Paxton Juuti, Mikko Sipilä, Matti Rissanen, Douglas Worsnop, Aleksei Shcherbinin, Nina Sarnela, and Juha Kangasluoma
Atmos. Meas. Tech., 17, 5989–6001, https://doi.org/10.5194/amt-17-5989-2024, https://doi.org/10.5194/amt-17-5989-2024, 2024
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Chemical ionisation mass spectrometry is used in the atmospheric sciences to measure trace gas concentrations. Neutral gases require charging in inlets before the mass-to-charge ratio of the resulting ions can be analysed. This study uses multiphysics modelling to investigate how the MION2 and Eisele type inlets work and shows the effect of tuning parameters and their current limitations. The findings are helpful for inlet users and are expected to aid in developing improved inlets.
Guillem Montalban-Faet, Eric Meneses-Albala, Santiago Felici-Castell, Juan J. Perez-Solano, and Jaume Segura-Garcia
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2024-127, https://doi.org/10.5194/amt-2024-127, 2024
Revised manuscript accepted for AMT
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WHO warns of ground-level ozone problems in urban areas, recommending increased monitoring for which low-cost sensors coupled with artificial intelligence are an excellent alternative.
Mohit L. Dubey, Andre Santos, Andrew B. Moyes, Ken Reichl, James E. Lee, Manvendra K. Dubey, Corentin LeYhuelic, Evan Variano, Emily Follansbee, Fotini K. Chow, and Sébastien C. Biraud
EGUsphere, https://doi.org/10.5194/egusphere-2024-3040, https://doi.org/10.5194/egusphere-2024-3040, 2024
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Orphaned wells, meaning wells lacking responsible owners, pose a significant and poorly understood environmental challenge. We propose, develop, and test a novel method for estimating emissions from orphaned wells using a Forced Advection Sampling Technique (FAST) that can overcome many of the limitations in current methods (cost, accuracy, safety). Our results suggest that the FAST method can provide a low-cost alternative to existing methods over a range of leak rates.
Steven A. Bailey, Reem A. Hannun, Andrew K. Swanson, and Thomas F. Hanisco
Atmos. Meas. Tech., 17, 5903–5910, https://doi.org/10.5194/amt-17-5903-2024, https://doi.org/10.5194/amt-17-5903-2024, 2024
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We have developed a portable, optically based instrument that measures NO2. It consumes less than 6 W of power, so it can easily run off a small battery. This instrument has made both balloon and UAV flights. NO2 measurement results compare favorably with other known NO2 instruments. We find this instrument to be stable with repeatable results compared with calibration sources. Material cost to build a single instrument is around USD 4000. This could be lowered with economies of scale.
Jinghui Lian, Olivier Laurent, Mali Chariot, Luc Lienhardt, Michel Ramonet, Hervé Utard, Thomas Lauvaux, François-Marie Bréon, Grégoire Broquet, Karina Cucchi, Laurent Millair, and Philippe Ciais
Atmos. Meas. Tech., 17, 5821–5839, https://doi.org/10.5194/amt-17-5821-2024, https://doi.org/10.5194/amt-17-5821-2024, 2024
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We have designed and deployed a mid-cost medium-precision CO2 sensor monitoring network in Paris since July 2020. The data are automatically calibrated by a newly implemented data processing system. The accuracies of the mid-cost instruments vary from 1.0 to 2.4 ppm for hourly afternoon measurements. Our model–data analyses highlight prospects for integrating mid-cost instrument data with high-precision measurements to improve fine-scale CO2 emission quantification in urban areas.
Abdullah Bolek, Martin Heimann, and Mathias Göckede
Atmos. Meas. Tech., 17, 5619–5636, https://doi.org/10.5194/amt-17-5619-2024, https://doi.org/10.5194/amt-17-5619-2024, 2024
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This study describes the development of a new UAV platform to measure atmospheric greenhouse gas (GHG) mole fractions, 2D wind speed, air temperature, humidity, and pressure. Understanding GHG flux processes and controls across various ecosystems is essential for estimating the current and future state of climate change. It was shown that using the UAV platform for such measurements is beneficial for improving our understanding of GHG processes over complex landscapes.
Jonathan F. Dooley, Kenneth Minschwaner, Manvendra K. Dubey, Sahar H. El Abbadi, Evan D. Sherwin, Aaron G. Meyer, Emily Follansbee, and James E. Lee
Atmos. Meas. Tech., 17, 5091–5111, https://doi.org/10.5194/amt-17-5091-2024, https://doi.org/10.5194/amt-17-5091-2024, 2024
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Methane is a powerful greenhouse gas originating from both natural and human activities. We describe a new uncrewed aerial system (UAS) designed to measure methane emission rates over a wide range of scales. This system has been used for direct quantification of point sources and distributed emitters over scales of up to 1 km. The system uses simultaneous measurements of methane and ethane to distinguish between different kinds of natural and human-related emission sources.
John Ericksen, Tobias P. Fischer, G. Matthew Fricke, Scott Nowicki, Nemesio M. Pérez, Pedro Hernández Pérez, Eleazar Padrón González, and Melanie E. Moses
Atmos. Meas. Tech., 17, 4725–4736, https://doi.org/10.5194/amt-17-4725-2024, https://doi.org/10.5194/amt-17-4725-2024, 2024
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Volcanic eruptions emit significant quantities of carbon dioxide (CO2) to the atmosphere. We present a new method for directly determining the CO2 emission from a volcanic eruption on the island of La Palma, Spain, using an unpiloted aerial vehicle (UAV). We also collected samples of the emitted CO2 and analyzed their isotopic composition. Together with the emission rate the isotopic data provide valuable information on the state of volcanic activity and the potential evolution of the eruption.
László Haszpra
Atmos. Meas. Tech., 17, 4629–4647, https://doi.org/10.5194/amt-17-4629-2024, https://doi.org/10.5194/amt-17-4629-2024, 2024
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The paper evaluates a 30-year-long atmospheric CO2 data series from a mid-continental central European site, Hegyhátsál (HUN). It presents the site-specific features observed in the long-term evolution of the atmospheric CO2 concentration. Since the measurement data are widely used in atmospheric inverse models and budget calculations all around the world, the paper provides potentially valuable information for model tuning and interpretation of the model results.
Mathieu Casado, Amaelle Landais, Tim Stoltmann, Justin Chaillot, Mathieu Daëron, Fréderic Prié, Baptiste Bordet, and Samir Kassi
Atmos. Meas. Tech., 17, 4599–4612, https://doi.org/10.5194/amt-17-4599-2024, https://doi.org/10.5194/amt-17-4599-2024, 2024
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Measuring water isotopic composition in Antarctica is difficult because of the extremely cold temperature in winter. Here, we designed a new infrared spectrometer able to measure the vapour isotopic composition during more than 95 % of the year in the coldest locations of Antarctica, whereas current commercial instruments are only able to measure during the warm summer months in the interior.
Jean-Louis Bonne, Ludovic Donnat, Grégory Albora, Jérémie Burgalat, Nicolas Chauvin, Delphine Combaz, Julien Cousin, Thomas Decarpenterie, Olivier Duclaux, Nicolas Dumelié, Nicolas Galas, Catherine Juery, Florian Parent, Florent Pineau, Abel Maunoury, Olivier Ventre, Marie-France Bénassy, and Lilian Joly
Atmos. Meas. Tech., 17, 4471–4491, https://doi.org/10.5194/amt-17-4471-2024, https://doi.org/10.5194/amt-17-4471-2024, 2024
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We present a top-down approach to quantify CO2 and CH4 emissions at the scale of an industrial site, based on a mass balance model relying on atmospheric concentrations measurements from a new sensor embarked on board uncrewed aircraft vehicles (UAVs). We present a laboratory characterization of our sensor and a field validation of our quantification method, together with field application to the monitoring of two real-world offshore oil and gas platforms.
Rodrigo Rivera-Martinez, Pramod Kumar, Olivier Laurent, Gregoire Broquet, Christopher Caldow, Ford Cropley, Diego Santaren, Adil Shah, Cécile Mallet, Michel Ramonet, Leonard Rivier, Catherine Juery, Olivier Duclaux, Caroline Bouchet, Elisa Allegrini, Hervé Utard, and Philippe Ciais
Atmos. Meas. Tech., 17, 4257–4290, https://doi.org/10.5194/amt-17-4257-2024, https://doi.org/10.5194/amt-17-4257-2024, 2024
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We explore the use of metal oxide semiconductors (MOSs) as a low-cost alternative for detecting and measuring CH4 emissions from industrial facilities. MOSs were exposed to several controlled releases to test their accuracy in detecting and quantifying emissions. Two reconstruction models were compared, and emission estimates were computed using a Gaussian dispersion model. Findings show that MOSs can provide accurate emission estimates with a 25 % emission rate error and a 9.5 m location error.
Zihan Zhu, Javier González-Rocha, Yifan Ding, Isis Frausto-Vicencio, Sajjan Heerah, Akula Venkatram, Manvendra Dubey, Don Collins, and Francesca M. Hopkins
Atmos. Meas. Tech., 17, 3883–3895, https://doi.org/10.5194/amt-17-3883-2024, https://doi.org/10.5194/amt-17-3883-2024, 2024
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Increases in agriculture, oil and gas, and waste management activities have contributed to the increase in atmospheric methane levels and resultant climate warming. In this paper, we explore the use of small uncrewed aircraft systems (sUASs) and AirCore technology to detect and quantify methane emissions. Results from field experiments demonstrate that sUASs and AirCore technology can be effective for detecting and quantifying methane emissions in near real time.
Sebastian Diez, Stuart Lacy, Hugh Coe, Josefina Urquiza, Max Priestman, Michael Flynn, Nicholas Marsden, Nicholas A. Martin, Stefan Gillott, Thomas Bannan, and Pete M. Edwards
Atmos. Meas. Tech., 17, 3809–3827, https://doi.org/10.5194/amt-17-3809-2024, https://doi.org/10.5194/amt-17-3809-2024, 2024
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In this paper we present an overview of the QUANT project, which to our knowledge is one of the largest evaluations of commercial sensors to date. The objective was to evaluate the performance of a range of commercial products and also to nourish the different applications in which these technologies can offer relevant information.
Linda Ort, Lenard Lukas Röder, Uwe Parchatka, Rainer Königstedt, Daniel Crowley, Frank Kunz, Ralf Wittkowski, Jos Lelieveld, and Horst Fischer
Atmos. Meas. Tech., 17, 3553–3565, https://doi.org/10.5194/amt-17-3553-2024, https://doi.org/10.5194/amt-17-3553-2024, 2024
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Airborne in situ measurements are of great importance to collect valuable data to improve our knowledge of the atmosphere but also present challenges which demand specific designs. This study presents an IR spectrometer for airborne trace-gas measurements with high data efficiency and a simple, compact design. Its in-flight performance is characterized with the help of a test flight and a comparison with another spectrometer. Moreover, results from its first campaign highlight its benefits.
Roger Curcoll, Claudia Grossi, Stefan Röttger, and Arturo Vargas
Atmos. Meas. Tech., 17, 3047–3065, https://doi.org/10.5194/amt-17-3047-2024, https://doi.org/10.5194/amt-17-3047-2024, 2024
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This paper presents a new user-friendly version of the Atmospheric Radon MONitor (ARMON). The efficiency of the instrument is of 0.0057 s-1, obtained using different techniques at Spanish and German chambers. The total calculated uncertainty of the ARMON for hourly radon concentrations above 5 Bq m-3 is lower than 10 % (k = 1). Results confirm that the ARMON is suitable to measure low-level radon activity concentrations and to be used as a transfer standard to calibrate in situ radon monitors.
Josie K. Radtke, Benjamin N. Kies, Whitney A. Mottishaw, Sydney M. Zeuli, Aidan T. H. Voon, Kelly L. Koerber, Grant W. Petty, Michael P. Vermeuel, Timothy H. Bertram, Ankur R. Desai, Joseph P. Hupy, R. Bradley Pierce, Timothy J. Wagner, and Patricia A. Cleary
Atmos. Meas. Tech., 17, 2833–2847, https://doi.org/10.5194/amt-17-2833-2024, https://doi.org/10.5194/amt-17-2833-2024, 2024
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The use of uncrewed aircraft systems (UASs) to conduct a vertical profiling of ozone and meteorological variables was evaluated using comparisons between tower or ground observations and UAS-based measurements. Changes to the UAS profiler showed an improvement in performance. The profiler was used to see the impact of Chicago pollution plumes on a shoreline area near Lake Michigan.
Chen-Wei Liang and Chang-Hung Shen
Atmos. Meas. Tech., 17, 2671–2686, https://doi.org/10.5194/amt-17-2671-2024, https://doi.org/10.5194/amt-17-2671-2024, 2024
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In the present study, a UAV platform with sensing and sampling systems was developed for 3D air pollutant concentration measurements. The sensing system of this platform contains multiple microsensors and IoT technologies for obtaining the real-time 3D distributions of critical air pollutants. The sampling system contains gas sampling sets and a 1 L Tedlar bag instead of a canister for the 3D measurement of VOC concentrations in accordance with the TO-15 method of the US EPA.
Daniel Furuta, Bruce Wilson, Albert A. Presto, and Jiayu Li
Atmos. Meas. Tech., 17, 2103–2121, https://doi.org/10.5194/amt-17-2103-2024, https://doi.org/10.5194/amt-17-2103-2024, 2024
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Methane is an important driver of climate change and is challenging to inexpensively sense in low atmospheric concentrations. We developed a low-cost sensor to monitor methane and tested it in indoor and outdoor settings. Our device shows promise for monitoring low levels of methane. We characterize its limitations and suggest future research directions for further development.
Audrey J. Dang, Nathan M. Kreisberg, Tyler L. Cargill, Jhao-Hong Chen, Sydney Hornitschek, Remy Hutheesing, Jay R. Turner, and Brent J. Williams
Atmos. Meas. Tech., 17, 2067–2087, https://doi.org/10.5194/amt-17-2067-2024, https://doi.org/10.5194/amt-17-2067-2024, 2024
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The Multichannel Organics In situ enviRonmental Analyzer (MOIRA) is a new instrument for measuring speciated volatile organic compounds (VOCs) in the air and has been developed for mapping concentrations from a hybrid car. MOIRA is characterized in the lab and pilot field studies of indoor air in a single-family residence and outdoor air during a mobile deployment. Future applications include indoor, outdoor, and lab measurements to grasp the impact of VOCs on air quality, health, and climate.
Asher P. Mouat, Zelda A. Siegel, and Jennifer Kaiser
Atmos. Meas. Tech., 17, 1979–1994, https://doi.org/10.5194/amt-17-1979-2024, https://doi.org/10.5194/amt-17-1979-2024, 2024
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Three fast-measurement formaldehyde monitors were deployed at two field sites in Atlanta, GA, over 1 year. Four different zeroing methods were tested to develop an optimal field setup as well as procedures for instrument calibration. Observations agreed well after calibration but were much higher compared to the TO-11A monitoring method, which is the golden standard. Historical HCHO concentrations were compared with measurements in this work, showing a 22 % reduction in midday HCHO since 1999.
Da Yang, Margarita Reza, Roy Mauldin, Rainer Volkamer, and Suresh Dhaniyala
Atmos. Meas. Tech., 17, 1463–1474, https://doi.org/10.5194/amt-17-1463-2024, https://doi.org/10.5194/amt-17-1463-2024, 2024
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This paper evaluates the performance of an aircraft gas inlet. Here, we use computational fluid dynamics (CFD) and experiments to demonstrate the role of turbulence in determining sampling performance of a gas inlet and identify ideal conditions for inlet operation to minimize gas loss. Experiments conducted in a high-speed wind tunnel under near-aircraft speeds validated numerical results. We believe that the results obtained from this work will greatly inform future gas inlet studies.
Reena Macagga, Michael Asante, Geoffroy Sossa, Danica Antonijević, Maren Dubbert, and Mathias Hoffmann
Atmos. Meas. Tech., 17, 1317–1332, https://doi.org/10.5194/amt-17-1317-2024, https://doi.org/10.5194/amt-17-1317-2024, 2024
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Using only low-cost microcontrollers and sensors, we constructed a measurement device to accurately and precisely obtain atmospheric carbon dioxide and water fluxes. The device was tested against known concentration increases and high-cost, commercial sensors during a laboratory and field experiment. We additionally tested the device over a longer period in a field study in Ghana during which the net ecosystem carbon balance and water use efficiency of maize cultivation were studied.
Matthew M. Coggon, Chelsea E. Stockwell, Megan S. Claflin, Eva Y. Pfannerstill, Lu Xu, Jessica B. Gilman, Julia Marcantonio, Cong Cao, Kelvin Bates, Georgios I. Gkatzelis, Aaron Lamplugh, Erin F. Katz, Caleb Arata, Eric C. Apel, Rebecca S. Hornbrook, Felix Piel, Francesca Majluf, Donald R. Blake, Armin Wisthaler, Manjula Canagaratna, Brian M. Lerner, Allen H. Goldstein, John E. Mak, and Carsten Warneke
Atmos. Meas. Tech., 17, 801–825, https://doi.org/10.5194/amt-17-801-2024, https://doi.org/10.5194/amt-17-801-2024, 2024
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Mass spectrometry is a tool commonly used to measure air pollutants. This study evaluates measurement artifacts produced in the proton-transfer-reaction mass spectrometer. We provide methods to correct these biases and better measure compounds that degrade air quality.
Tianran Han, Conghui Xie, Yayong Liu, Yanrong Yang, Yuheng Zhang, Yufei Huang, Xiangyu Gao, Xiaohua Zhang, Fangmin Bao, and Shao-Meng Li
Atmos. Meas. Tech., 17, 677–691, https://doi.org/10.5194/amt-17-677-2024, https://doi.org/10.5194/amt-17-677-2024, 2024
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This study reported an integrated UAV measurement platform for GHG monitoring and its application for emission quantification from a coking plant. The key element of this system is a newly designed air sampler, consisting of a 150 m long tube with remote-controlled time stamping. When comparing the top-down results to those derived from the bottom-up inventory method, the present findings indicate that the use of IPCC emission factors for emission calculations can lead to overestimation.
Yuening Li, Faqiang Zhan, Yushan Su, Ying Duan Lei, Chubashini Shunthirasingham, Zilin Zhou, Jonathan P. D. Abbatt, Hayley Hung, and Frank Wania
Atmos. Meas. Tech., 17, 715–729, https://doi.org/10.5194/amt-17-715-2024, https://doi.org/10.5194/amt-17-715-2024, 2024
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A simple device for sampling gases from the atmosphere without the help of pumps was calibrated for an important group of hazardous air pollutants called polycyclic aromatic compounds (PACs). While the sampler appeared to perform well when used for relatively short periods of up to several months, some PACs were lost from the sampler during longer deployments. Sampling rates that can be used to quantitatively interpret the quantities of PACs taken up in the device have been derived.
Jiaxin Li, Kunpeng Zang, Yi Lin, Yuanyuan Chen, Shuo Liu, Shanshan Qiu, Kai Jiang, Xuemei Qing, Haoyu Xiong, Haixiang Hong, Shuangxi Fang, Honghui Xu, and Yujun Jiang
Atmos. Meas. Tech., 16, 4757–4768, https://doi.org/10.5194/amt-16-4757-2023, https://doi.org/10.5194/amt-16-4757-2023, 2023
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Based on observed data of CO2 and CH4 and meteorological parameters over the Yellow Sea in November 2012 and June 2013, a data process and quality control method was optimized and established to filter the data influenced by multiple factors. Spatial and seasonal variations in CO2 and CH4 mixing ratios were mainly controlled by the East Asian Monsoon, while the influence of air–sea exchange was slight.
Zaneta Hamryszczak, Antonia Hartmann, Dirk Dienhart, Sascha Hafermann, Bettina Brendel, Rainer Königstedt, Uwe Parchatka, Jos Lelieveld, and Horst Fischer
Atmos. Meas. Tech., 16, 4741–4756, https://doi.org/10.5194/amt-16-4741-2023, https://doi.org/10.5194/amt-16-4741-2023, 2023
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Hydroperoxide measurements improve the understanding of atmospheric oxidation processes. We introduce an instrumental setup for airborne measurements. The aim of the work is the characterization of the measurement method with emphasis on interferences impacting instrumental uncertainty. Technical and physical challenges do not critically impact the instrumental performance. The instrument resolves dynamic processes, such as convective transport, as shown based on the CAFE-Brazil campaign.
James F. Hurley, Alejandra Caceres, Deborah F. McGlynn, Mary E. Tovillo, Suzanne Pinar, Roger Schürch, Ksenia Onufrieva, and Gabriel Isaacman-VanWertz
Atmos. Meas. Tech., 16, 4681–4692, https://doi.org/10.5194/amt-16-4681-2023, https://doi.org/10.5194/amt-16-4681-2023, 2023
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Volatile organic compounds (VOCs) have a wide range of sources and impacts on environments and human health that make them spatially, temporally, and chemically varied. Current methods lack the ability to collect samples in ways that provide spatial and chemical resolution without complex, costly instrumentation. We describe and validate a low-cost, portable VOC sampler and demonstrate its utility in collecting distributed coordinated samples.
Simone Brunamonti, Manuel Graf, Tobias Bühlmann, Céline Pascale, Ivan Ilak, Lukas Emmenegger, and Béla Tuzson
Atmos. Meas. Tech., 16, 4391–4407, https://doi.org/10.5194/amt-16-4391-2023, https://doi.org/10.5194/amt-16-4391-2023, 2023
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The abundance of water vapor (H2O) in the upper atmosphere has a significant impact on the rate of global warming. We developed a new lightweight spectrometer (ALBATROSS) for H2O measurements aboard meteorological balloons. Here, we assess the accuracy and precision of ALBATROSS using metrology-grade reference gases. The results demonstrate the exceptional potential of mid-infrared laser absorption spectroscopy as a new reference method for in situ measurements of H2O in the upper atmosphere.
Roubina Papaconstantinou, Marios Demosthenous, Spyros Bezantakos, Neoclis Hadjigeorgiou, Marinos Costi, Melina Stylianou, Elli Symeou, Chrysanthos Savvides, and George Biskos
Atmos. Meas. Tech., 16, 3313–3329, https://doi.org/10.5194/amt-16-3313-2023, https://doi.org/10.5194/amt-16-3313-2023, 2023
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In this paper, we investigate the performance of low-cost electrochemical gas sensors. We carried out yearlong measurements at a traffic air quality monitoring station, where the low-cost sensors were collocated with reference instruments and exposed to highly variable environmental conditions with extremely high temperatures and low relative humidity (RH). Sensors provide measurements that exhibit increasing errors and decreasing correlations as temperature increases and RH decreases.
Jianghanyang Li, Bianca C. Baier, Fred Moore, Tim Newberger, Sonja Wolter, Jack Higgs, Geoff Dutton, Eric Hintsa, Bradley Hall, and Colm Sweeney
Atmos. Meas. Tech., 16, 2851–2863, https://doi.org/10.5194/amt-16-2851-2023, https://doi.org/10.5194/amt-16-2851-2023, 2023
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Monitoring a suite of trace gases in the stratosphere will help us better understand the stratospheric circulation and its impact on the earth's radiation balance. However, such measurements are rare and usually expensive. We developed an instrument that can measure stratospheric trace gases using a low-cost sampling platform (AirCore). The results showed expected agreement with aircraft measurements, demonstrating this technique provides a low-cost and robust way to observe the stratosphere.
Tara I. Yacovitch, Christoph Dyroff, Joseph R. Roscioli, Conner Daube, J. Barry McManus, and Scott C. Herndon
Atmos. Meas. Tech., 16, 1915–1921, https://doi.org/10.5194/amt-16-1915-2023, https://doi.org/10.5194/amt-16-1915-2023, 2023
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Ethylene oxide is a toxic, carcinogenic compound used in the medical and bulk sterilization industry. Here we describe a precise and fast laser-based ethylene oxide monitor. We report months-long concentrations at a Massachusetts site, and we show how they suggest a potential emission source 35 km away. This source, and another, is confirmed by driving the instrument downwind of the sites, where concentrations were tens to tens of thousands of times greater than background levels.
Tatsumi Nakano and Takashi Morofuji
Atmos. Meas. Tech., 16, 1583–1595, https://doi.org/10.5194/amt-16-1583-2023, https://doi.org/10.5194/amt-16-1583-2023, 2023
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We have developed a system that can automatically measure the pump efficiency of the ECC-type ozonesonde. Operational measurement for 13 years by this system revealed that the efficiency fluctuates in each and slightly increases over time. Those can affect the estimation of total ozone amount by up to 4 %. This result indicates that it is necessary to understand the tendency of the pump correction factor of each ozonesonde in order to detect the actual atmospheric change with high accuracy.
Cited articles
Ackerman, M., Frimout, D., Girard, A., Gottignies, M., and Muller, C.:
Stratospheric HCl from infrared spectra, Geophys. Res. Lett., 3, 81–83,
https://doi.org/10.1029/GL003i002p00081, 1976.
Allen, N.: nthallen/icosfit: icosfit V4.2.5 (Version V4.2.5), Zenodo,
https://doi.org/10.5281/zenodo.3903723, 2020.
Anderson, J. G., Wilmouth, D. M., Smith, J. B., and Sayres, D. S.: UV Dosage
levels in summer: Increased risk of ozone loss from convectively injected
water vapor, Science, 337, 835–839, https://doi.org/10.1126/science.1222978, 2012.
Anderson, J. G., Weisenstein, D. K., Bowman, K. P., Homeyer, C. R., Smith, J. B.,
Wilmouth, D. M., Sayres, D. S., Klobas, J. E., Leroy, S. E., Dykema, J. A., and
Wofsy, S. C.: Stratospheric ozone over the United States in summer linked to
observations of convection and temperature via chlorine and bromine
catalysis, P. Natl. Acad. Sci. USA, 114, E4905–E4913, https://doi.org/10.1073/pnas.1619318114,
2017.
Bonne, G. P., Stimpfle, R. M., Cohen, R. C., Voss, P. B., Perkins, K. K.,
Anderson, J. G., Salawitch, R. J., Elkins, J. W., Dutton, G. S., Jucks, K. W.,
and Toon, G. C.: An examination of the inorganic chlorine budget in the lower
stratosphere, J. Geophys. Res.-Atmos., 105, 1957–1971,
https://doi.org/10.1029/1999JD900996, 2000.
Borgentun, C., Frez, C., Briggs, R. M., Fradet, M., and Forouhar, S.:
Single-mode high-power interband cascade lasers for mid-infrared absorption
spectroscopy, Opt. Express, 23, 2446–2450,
https://doi.org/10.1364/OE.23.002446, 2015.
Christensen, L. E., Webster, C. R., and Yang, R. Q.: Aircraft and balloon in
situ measurements of methane and hydrochloric acid using interband cascade
lasers, Appl. Optics, 46, 1132–1138, https://doi.org/10.1364/ao.46.001132,
2007.
Clapp, C. E., Smith, J. B., Bedka, K. M., and Anderson, J. G.: Identifying Source
Regions and the Distribution of Cross-Tropopause Convective Outflow Over
North America During the Warm Season, JGR Atmospheres, 127, 13750–13762,
https://doi.org/10.1029/2019JD031382, 2019.
Diffenbaugh, N. S., Scherer, M., and Trapp, R. J.: Robust increases in severe
thunderstorm environments in response to greenhouse forcing, P. Natl. Acad. Sci. USA, 110,
163661–16366, https://doi.org/10.1073/pnas.1307758110, 2013.
Dyroff, C., Zahn, A., Sanati, S., Christner, E., Rauthe-Schöch, A., and Schuck, T. J.: Tunable diode laser in-situ CH4 measurements aboard the CARIBIC passenger aircraft: instrument performance assessment, Atmos. Meas. Tech., 7, 743–755, https://doi.org/10.5194/amt-7-743-2014, 2014.
European Centre for Medium-Range Weather Forecast (ECMWF): The ERA-Interim
reanalysis dataset, available at:
https://www.ecmwf.int/en/forecasts/datasets/archive-datasets/reanalysis-datasets/era-interim,
(last access: 15 June 2020), Copernicus Climate Change Service (C3S), 2011.
Farmer, C. B., Raper, O. F., and Norton, R. H.: Spectroscopic detection and
vertical distribution of HCl in the troposphere and stratosphere, Geophys.
Res. Lett., 3, 13–16, https://doi.org/10.1029/GL003i001p00013, 1976.
Froidevaux, L., Jiang, Y. B., Lambert, A., Livesey, N. J., Read, W. G., Waters,
J. W., Fuller, R. A., Marcy, T. P., Popp, R. S., Gao, R. S., Fahey, D. W., Jucks,
K. W., Stachnik, R. A., Toon, G. C., Christensen, L. E., Webster, C. R., Bernath,
P. F., Boone, C. D., Walker, K. A., Pumphrey, H. C., Harwood, R. S., Manney,
G. L., Schwartz, M. J., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy,
D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Snyder, W. V., Stek, P. C.,
Thurstans, R. P., and Wagner, P. A.: Validation of Aura Microwave Limb Sounder
HCl measurements, J. Geophys. Res., 113, D15S25,
https://doi.org/10.1029/2007JD009025, 2008.
Gordon, I. E., Rothman, L. S., Hill, C., Kochanov, R. V., Tan, Y., Bernath, P. F., Birk, M., Boudon, V., Campargue, A., Chance, K. V., Drouin, B. J., Flaud, J.-M., Gamache, R. R., Hodges, J. T., Jacquemart, D., Perevalov, V. I., Perrin, A., Shine, K. P., Smith, M.-A.H., Tennyson, J., Toon, G. C., Tran, H., Tyuterev, V. G., Barbe, A., Császár, A. G., Devi, V. M., Furtenbacher, T., Harrison, J. J., Hartmann, J.-M., Jolly, A., Johnson, T. J., Karman, T., Kleiner, I., Kyuberis, A. A., Loos, J., Lyulin, O. M., Massie, S. T., Mikhailenko, S. N., Moazzen-Ahmadi, N., Müller, H. S. P., Naumenko, O. V., Nikitin, A. V., Polyansky, O. L., Rey, M., Rotger, M., Sharpe, S. W., Sung, K., Starikova, E., Tashkun, S. A., Vander Auwera, J., Wagner, G., Wilzewski, J., Wcisło, P., Yu, S., and Zak, E. J.: The HITRAN2016 molecular spectroscopic database, J.
Quant. Spectrosc. Ra., 203, 3–69, https://doi.org/10.1016/j.jqsrt.2017.06.038,
2017.
Hagen, C. L., Lee, B. C., Franka, I. S., Rath, J. L., VandenBoer, T. C., Roberts, J. M., Brown, S. S., and Yalin, A. P.: Cavity ring-down spectroscopy sensor for detection of hydrogen chloride, Atmos. Meas. Tech., 7, 345–357, https://doi.org/10.5194/amt-7-345-2014, 2014.
Hamamatsu: Characteristics and use of infrared detectors, available at: https://mmrc.caltech.edu/FTIR/Literature/General/Hamamatus IR dectors.pdf (last access: 20 May 2020), 2011.
Hanisco, T. F., Moyer, E. J., Weinstock, E. M., St. Clair, J. M., Sayres, D. S.,
Smith, J. B., Lockwood, R., Anderson, J. G., Dessler, A. E., Keutsch, F. N.,
Spackman, J. R., Read, W. G., and Bui, T. P.: Observations of deep convective
influence on stratospheric water vapor and its isotopic composition,
Geophys. Res. Lett., 34, L04814, https://doi.org/10.1029/2006GL027899, 2007.
Keith, D.W.: Geoengineering the Climate: History and Prospect, Annu. Rev.
Energ. Environ., 25, 245–284, https://doi.org/10.1146/annurev.energy.25.1.245,
2000.
Kräuchi, A., Philipona, R., Romanens, G., Hurst, D. F., Hall, E. G., and Jordan, A. F.: Controlled weather balloon ascents and descents for atmospheric research and climate monitoring, Atmos. Meas. Tech., 9, 929–938, https://doi.org/10.5194/amt-9-929-2016, 2016.
Leen, J. B. and O'Keefe, A.: Optical re-injection in cavity-enhanced absorption
spectroscopy, Rev. Sci. Instrum., 85, 093101,
https://doi.org/10.1063/1.4893972, 2014.
Li, G., Gordon, I. E., Bernath, P. F., and Rothman, L. S.: Direct fit of
experimental ro-vibrational intensities to the dipole moment function:
Application to HCl, J. Quant. Spectrosc. Ra., 112, 1543–1550,
https://doi.org/10.1016/j.jqsrt.2011.03.014, 2011.
Livesey, N. J., Read, W. G., Wagner, P. A., Froidevaux, L., Lambert, A.,
Manney, G. L., Millán Valle, L. F., Pumphrey, H. C., Santee, M. L.,
Schwartz, M. J., Wang, S., Fuller, R. A., Jarnot, R. F., Knosp, B. W., Martinez,
E., and Lay, R. R.: Earth Observing System (EOS) Aura Microwave Limb Sounder
(MLS) Version 4.2x Level 2 and 3 data quality and description document, Jet
Propulsion Laboratory, available at: https://mls.jpl.nasa.gov/data/v4-2_data_quality_document.pdf, last access: 20 November 2020.
Los Gatos Research (LGR): Homepage, available at: https://www.lgrinc.com, last access: 27 May, 2020.
Mahieu, E., Chipperfield, M.P., Noholt, J., Reddmann, T., Anderson, J.,
Bernath, P. F., Blumenstock, T., Coffey, M. T., Dhomse, S. S., Feng, W.,
Franco, B., Froidevaux, L., Griffith, D. W. T., Hannigan, J. W., Hase, F.,
Hossaini, R., Jones, N. B., Morino, I., Murata, I., Nakajima, H., Palm, M.,
Paton-Walsh, C., Russell III, J. M., Schneider, M., Servais, C., Smale, D.,
and Walker, K.: Recent Northern Hemisphere stratospheric HCl increase due to
atmospheric circulation changes, Nature, 515, 104–107,
https://doi.org/10.1038/nature13857, 2014.
Marcy, T. P., Fahey, D. W., Gao, R. S., Popp, P. J., Richard, E. C., Thompson,
T. L., Rosenlof, K. H., Ray, E. A., Salawitch, R. J., Atherton, C. S., Bergmann,
D. J., Ridley, B. A., Weinheimer, A. J., Loewenstein, M., Weinstock, E. M., and
Mahoney, M. J.: Quantifying Stratospheric Ozone in the Upper Troposphere with
in Situ Measurements of HCl, Science, 34, 261–265,
https://doi.org/10.1126/science.1093418, 2004.
Marcy, T. P., Gao, R. S., Northway, M. J., Popp, P. J., Stark, H., and Fahey,
D. W.: Using chemical ionization mass spectrometry for detection of HNO, HCl,
and ClONO2 in the atmosphere, Int. J. Mass Spectrom., 243, 63–70,
https://doi.org/10.1016/j.ijms.2004.11.012, 2005.
Molina, M. J. and Rowland, F. S.: Stratospheric sink for chlorofluoromethanes:
chlorine atom-catalysed destruction of ozone, Nature, 249, 810–824,
https://doi.org/10.1038/249810a0, 1974.
Montzka, S., Dutton, G. S., Yu, P., Ray, E., Portmann, R. W., Daniel, J. S.,
Kuijpers, L., Hall, B. D., Mondeel, D., Siso, C., Nance, J. D., Rigby, M.,
Manning, A. J., Hu, L., Moore, F., Miller, B. R., and Elkinds J. W.: An
unexpected and persistent increase in global emissions of ozone-depleting
CFC-11, Nature, 557, 413–417, https://doi.org/10.1038/s41586-018-0106-2, 2018.
NASA: AVE 2005 WB-57 files, available at:
https://espo.nasa.gov/crystalface/archive/browse/ave_0506/WB57 (last access: 6 March 2020), 2005.
NOAA: Ozonesonde Boulder, Colorado 100 Meter Average Files, available at: https://www.esrl.noaa.gov/gmd/aftp/data/ozwv/Ozonesonde/Boulder, Colorado/100 Meter Average Files/,
(last access: 15 December 2020), 2018.
Ouyang, B. and Jones. R. L.: Understanding the sensitivity of cavity-enhanced
absorption spectroscopy: pathlength enhancement versus noise suppression,
Appl. Phys. B, 109, 581–591, https://doi.org/10.1007/s00340-012-5178-3,
2012.
Roberts, J. M., Veres, P., Warneke, C., Neuman, J. A., Washenfelder, R. A., Brown, S. S., Baasandorj, M., Burkholder, J. B., Burling, I. R., Johnson, T. J., Yokelson, R. J., and de Gouw, J.: Measurement of HONO, HNCO, and other inorganic acids by negative-ion proton-transfer chemical-ionization mass spectrometry (NI-PT-CIMS): application to biomass burning emissions, Atmos. Meas. Tech., 3, 981–990, https://doi.org/10.5194/amt-3-981-2010, 2010.
Sayres, D. S., Moyer, E. J., Hanisco, T. F., St. Clair, J. M., Keutsch, F. N.,
O'Brien, A., Allen, N. T., Lapson, L., Demusz, J. N., Rivero, M., Martin, T.,
Greenberg, M., Tuozzolo, C., Engel, G. S., Kroll, J. H., Paul, J. B., and
Anderson J. G.: A new cavity based absorption instrument for detection of
water isotopologues in the upper troposphere and lower stratosphere, Rev.
Sci. Instrum., 80, 044102, https://doi.org/10.1063/1.3117349, 2009.
Scott, D. C., Herman, R. L., Webster, C. R., May, R. D., Flesch, G. J., and
Moyer, E. J.: Airborne Laser Infrared Absorption Spectrometer (ALIAS-II) for
in situ atmospheric measurements of N2O, CH4, CO, HCl, and NO2 from balloon
or remotely piloted aircraft platforms, Appl. Opt., 38, 4609–4622,
https://doi.org/10.1364/AO.38.004609, 1999.
SilcoTek: Chemical Compatibility with SilcoTek Coatings, available at:
https://www.silcotek.com/coating-compatibility, last access: 28 May 2020.
Smith, J. B., Wilmouth, D., Bedka, K. M., Bowman, K. B., Homeyer, C. R., Dykema,
J. A., Sargent, M. R., Clapp, C. E., Leroy, S. S., Sayres, D. S., Dean-Day, J. M.,
Bui, T. P., and Anderson, J. G.: A case study of convectively sourced water
vapor observed in the overworld stratosphere over the United States, J.
Geophys. Res.-Atmos., 122, 9529–9554, https://doi.org/10.1002/2017JD026831,
2017.
Solomon, S.: Stratospheric Ozone Depletion: A review of concepts and
history, Rev. Geophys., 37, 275–316,
https://doi.org/10.1029/1999RG900008, 1999.
Tiger Optics: Homepage, available at: https://www.tigeroptics.com, last access: 27 May 2020.
Tilmes, S., Garcia, R. R., Kinnison, D. E., Gettelman, A., and Rasch, P. J.:
Impact of geoengineered aerosols on the troposphere and stratosphere, J.
Geophys. Res., 114, D12305, https://doi.org/10.1029/2008JD011420, 2009.
Vurgaftmen, I., Weih, R., Kamp, M., Meyer, J. R., Canedy, C. L., Kim, C. S.,
Kim, M., Bewley, W. W., Merritt, C. D., Abell, J., and Höfling, S.:
Interband cascade lasers, J. Phys. D: Appl. Phys., 48, 123001,
https://doi.org/10.1088/0022-3727/48/12/123001, 2015.
Waters, J. W., Froidevaux, L., Harwood, R. S., Jarnot, R. F., Pickett, H. M., Read, W. G., Siegel, P. H., Cofield, R. E., Filipiak, M. J., Flower, D. A., Holden, J. R., Lau, G. K., Livesey, N. J., Manney, G. L., Pumphrey, H. C., Santee, M. L., Wu, D. L., Cuddy, D. T., Lay, R. R., Loo, M. S., Perun, V. S., Schwartz, M. J., Stek, P. C., Thurstans, R. P., Boyles, M. A., Chandra, K. M., Chavez, M. C., Chen, G.-S., Chudasama, B. V., Dodge, R., Fuller, R. A., Girard, M. A., Jiang, J. H., Jiang, Y., Knosp, B. W., LaBelle, R. C., Lam, J. C., Lee, K. A., Miller, D., Oswald, J. E., Patel, N. C., Pukala, D. M., Quintero, O., Scaff, D. M., Van Snyder, W., Tope, M. C., Wagner, P. A., and Walch, M. J.: The Earth Observing System Microwave Limb Sounder (EOS
MLS) on the aura satellite, IEEE Trans. Geosci. Remote Sens., 44, 1075–1092,
https://doi.org/10.1109/TGRS.2006.873771, 2006.
Webster, C. R. May, R. D., Trimble, C. A., Chave, R. G., and Kendall, J.:
Aircraft (ER-2) Laser Infrared Absorption Spectrometer (ALIAS) for In-situ
Stratospheric Measurements of HCl, N2O, CH4, NO2, and
HNO3, Appl. Optics, 33, 454–472,
https://doi.org/10.1364/AO.33.000454, 1994.
Weinstock, E. M., Pittman, J. V., Sayres, D. S., Smith, J. B., Anderson, J. G.,
Wofsy, S. C., Xueref, I., Gerbig, C., Daube, B. C., Pfister, L., Richard,
E. C., Ridley, B. A., Weinheimer, A. J., Jost, H.-J., Lopez, J. P., Loewenstein,
M., and Thompson, L.: Quantifying the impact of the North American monsoon
and deep midlatitude convection on the subtropical lowermost stratosphere
using in situ measurements, J. Geophys. Res., 112, D18310,
https://doi.org/10.1029/2007JD008554, 2007.
Wilkerson, J.: Harvard University Stratospheric Chemistry
Experiment data set, Harvard Dataverse, V1 [data set], https://doi.org/10.7910/DVN/PMLPRR, 2021.
Wilkerson, J., Dobosy, R., Sayres, D. S., Healy, C., Dumas, E., Baker, B., and Anderson, J. G.: Permafrost nitrous oxide emissions observed on a landscape scale using the airborne eddy-covariance method, Atmos. Chem. Phys., 19, 4257–4268, https://doi.org/10.5194/acp-19-4257-2019, 2019.
Williams, W. J., Kosters, J. J., Goldman, A., and Murcray, D. G.:
Measurement of the Stratospheric Mixing Ratio of HCl Using Infrared
Absorption Technique, Geophys. Res. Lett., 3, 383–385, 1976.
Witinski, M. F., Sayres, D. S., and Anderson, J. G.: High precision methane
isotopologue ratio measurements at ambient mixing ratios using integrated
cavity output spectroscopy, Applied Physics B, 102, 375–380,
https://doi.org/10.1007/s00340-010-3957-2, 2010.
WMO (World Meteorological Organization): Scientific Assessment of Ozone
Depletion: 2018, Global Ozone Research and Monitoring Project – Report No.
58, Geneva, Switzerland, 588 pp., 2018.
Short summary
The ozone layer in the stratosphere protects life from harmful UV light, but chlorine-based pollution threatens to damage it. We developed an instrument that couples a laser with highly reflective mirrors and advanced electronics to measure an important residue of this pollution: hydrogen chloride. Our instrument has an improved, more modern layout that we successfully tested in flight. This paves the way for future, advanced techniques that seek to evaluate the health of Earth’s ozone layer.
The ozone layer in the stratosphere protects life from harmful UV light, but chlorine-based...
