Articles | Volume 14, issue 10
https://doi.org/10.5194/amt-14-6821-2021
© 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-14-6821-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Oct 2021
Research article |
| 22 Oct 2021
| 22 Oct 2021
Gravity wave instability structures and turbulence from more than 1.5 years of OH* airglow imager observations in Slovenia
René Sedlak
CORRESPONDING AUTHOR
Institute of Physics, University of Augsburg, Augsburg, Germany
Patrick Hannawald
Institute of Physics, University of Augsburg, Augsburg, Germany
German Remote Sensing Data Center, German Aerospace Center,
Oberpfaffenhofen, Germany
Carsten Schmidt
German Remote Sensing Data Center, German Aerospace Center,
Oberpfaffenhofen, Germany
Sabine Wüst
German Remote Sensing Data Center, German Aerospace Center,
Oberpfaffenhofen, Germany
Michael Bittner
Institute of Physics, University of Augsburg, Augsburg, Germany
German Remote Sensing Data Center, German Aerospace Center,
Oberpfaffenhofen, Germany
Samo Stanič
Center for Astrophysics and Cosmology, University of Nova Gorica,
Ajdovščina, Slovenia
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We show that machine learning can help in classifying images of the OH* airglow, a thin layer in the middle atmosphere (ca. 86 km height) emitting infrared radiation, in an efficient way. By doing this,
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Gravity wave (GW) activity in the UMLT in the period range 6-480 min is calculated by applying a wavelet analysis to nocturnal temperature time series derived from OH* airglow spectrometers. We analyse measurements from eight different locations at different latitudes.
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We use a near-infrared camera for the investigation of gravity waves. The camera observes the airglow layer, which is modulated by the gravity waves. The image processing, including the removal of the stars is explained. We describe the analysis with a 2D fast Fourier transform and automatic derivation of the wave parameters. The results show a clear seasonal and intra-diurnal variability, which is characterised in order to improve our understanding of gravity waves in the middle atmosphere.
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In this paper a SWIR airglow imager is presented. It is especially designed for the observation of small-scale gravity waves and turbulence features in the OH airglow layer with a high spatio-temporal resolution of up to 17 m (at mesopause heights) and 2.5 to 2.8 s. Two case studies show small-scale wave structures with horizontal wavelengths of approximately 550 m as well as vortex formation and decomposition of wave fronts, both indicating the onset of turbulence.
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The Earth's nighttime radiation in the range from the near-UV to the near-IR mainly originates between 75 and 105 km and consists of lines of different species, which are important indicators of the chemistry and dynamics at these altitudes. Based on astronomical spectra, we have characterised the structure and variability of a pseudo-continuum of a high number of faint lines and discovered a new emission process in the near-IR. By means of simulations, we identified HO2 as the likely emitter.
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Two identical instruments in a parallel setup were used to observe the mesospheric OH airglow for more than 10 years (2009–2020) at 47.42°N, 10.98°E. This allows unique analyses of data quality aspects and their impact on the obtained results. During solar cycle 24 the influence of the sun was strong (∼6 K per 100 sfu). A quasi-2-year oscillation (QBO) of ±1 K is observed mainly during the maximum of the solar cycle. Unlike the stratospheric QBO the variation has a period of or below 24 months.
René Sedlak, Andreas Welscher, Patrick Hannawald, Sabine Wüst, Rainer Lienhart, and Michael Bittner
Atmos. Meas. Tech., 16, 3141–3153, https://doi.org/10.5194/amt-16-3141-2023, https://doi.org/10.5194/amt-16-3141-2023, 2023
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We show that machine learning can help in classifying images of the OH* airglow, a thin layer in the middle atmosphere (ca. 86 km height) emitting infrared radiation, in an efficient way. By doing this,
dynamicepisodes of strong movement in the OH* airglow caused predominantly by waves can be extracted automatically from large data sets. Within these dynamic episodes, turbulent wave breaking can also be found. We use these observations of turbulence to derive the energy released by waves.
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Ground-based OH* airglow measurements have been carried out for almost 100 years. Advanced detector technology has greatly simplified the automatic operation of OH* airglow observing instruments and significantly improved the temporal and/or spatial resolution. Studies based on long-term measurements or including a network of instruments are reviewed, especially in the context of deriving gravity wave properties. Scientific and technical challenges for the next few years are described.
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With airglow spectrometers, the temperature in the upper mesosphere/lower thermosphere can be derived each night. The data allow to estimate the amount of energy which is transported by small-scale atmospheric waves, known as gravity waves. In order to do this, information about the Brunt–Väisälä frequency and its evolution during the year is necessary. This is provided here for low and midlatitudes based on 18 years of satellite data.
René Sedlak, Alexandra Zuhr, Carsten Schmidt, Sabine Wüst, Michael Bittner, Goderdzi G. Didebulidze, and Colin Price
Atmos. Meas. Tech., 13, 5117–5128, https://doi.org/10.5194/amt-13-5117-2020, https://doi.org/10.5194/amt-13-5117-2020, 2020
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Gravity wave (GW) activity in the UMLT in the period range 6-480 min is calculated by applying a wavelet analysis to nocturnal temperature time series derived from OH* airglow spectrometers. We analyse measurements from eight different locations at different latitudes.
GW activity shows strong period dependence. We find hardly any seasonal variability for periods below 60 min and a semi-annual cycle for periods longer than 60 min that evolves into an annual cycle around a period of 200 min.
Sabine Wüst, Carsten Schmidt, Patrick Hannawald, Michael Bittner, Martin G. Mlynczak, and James M. Russell III
Atmos. Chem. Phys., 19, 6401–6418, https://doi.org/10.5194/acp-19-6401-2019, https://doi.org/10.5194/acp-19-6401-2019, 2019
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Patrick Hannawald, Carsten Schmidt, René Sedlak, Sabine Wüst, and Michael Bittner
Atmos. Meas. Tech., 12, 457–469, https://doi.org/10.5194/amt-12-457-2019, https://doi.org/10.5194/amt-12-457-2019, 2019
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We use a near-infrared camera for the investigation of gravity waves. The camera observes the airglow layer, which is modulated by the gravity waves. The image processing, including the removal of the stars is explained. We describe the analysis with a 2D fast Fourier transform and automatic derivation of the wave parameters. The results show a clear seasonal and intra-diurnal variability, which is characterised in order to improve our understanding of gravity waves in the middle atmosphere.
Sabine Wüst, Thomas Offenwanger, Carsten Schmidt, Michael Bittner, Christoph Jacobi, Gunter Stober, Jeng-Hwa Yee, Martin G. Mlynczak, and James M. Russell III
Atmos. Meas. Tech., 11, 2937–2947, https://doi.org/10.5194/amt-11-2937-2018, https://doi.org/10.5194/amt-11-2937-2018, 2018
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OH*-spectrometer measurements allow the analysis of gravity wave ground-based periods, but spatial information cannot necessarily be deduced. We combine the approach of Wachter at al. (2015) in order to derive horizontal wavelengths (but based on only one OH* spectrometer) with additional information about wind and temperature and compute vertical wavelengths. Knowledge of these parameters is a precondition for the calculation of further information such as the wave group velocity.
Sabine Wüst, Michael Bittner, Jeng-Hwa Yee, Martin G. Mlynczak, and James M. Russell III
Atmos. Meas. Tech., 10, 4895–4903, https://doi.org/10.5194/amt-10-4895-2017, https://doi.org/10.5194/amt-10-4895-2017, 2017
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In the Alpine region, the most dense subnetwork of identical NDMC (Network for the Detection of Mesospheric Change) instruments can be found. With these instruments the mesopause temperature is derived each night. The data can be used for the investigation of the amount of energy which is transported by small-scale atmospheric waves, known as gravity waves, provided that the so-called Brunt–Väisälä frequency is known. Information about the variability of this parameter is provided here.
Sabine Wüst, Verena Wendt, Ricarda Linz, and Michael Bittner
Atmos. Meas. Tech., 10, 3453–3462, https://doi.org/10.5194/amt-10-3453-2017, https://doi.org/10.5194/amt-10-3453-2017, 2017
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Cubic splines with equidistant spline sampling points are a common method in atmospheric science for the approximation of background conditions by means of filtering superimposed fluctuations from a data series. However, splines can generate considerable artificial oscillations in the background and the residuals. We introduce a repeating spline approach which is able to significantly reduce this phenomenon and to apply it to TIMED-SABER vertical temperature profiles from 2010 to 2014.
René Sedlak, Patrick Hannawald, Carsten Schmidt, Sabine Wüst, and Michael Bittner
Atmos. Meas. Tech., 9, 5955–5963, https://doi.org/10.5194/amt-9-5955-2016, https://doi.org/10.5194/amt-9-5955-2016, 2016
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In this paper a SWIR airglow imager is presented. It is especially designed for the observation of small-scale gravity waves and turbulence features in the OH airglow layer with a high spatio-temporal resolution of up to 17 m (at mesopause heights) and 2.5 to 2.8 s. Two case studies show small-scale wave structures with horizontal wavelengths of approximately 550 m as well as vortex formation and decomposition of wave fronts, both indicating the onset of turbulence.
Patrick Hannawald, Carsten Schmidt, Sabine Wüst, and Michael Bittner
Atmos. Meas. Tech., 9, 1461–1472, https://doi.org/10.5194/amt-9-1461-2016, https://doi.org/10.5194/amt-9-1461-2016, 2016
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This paper presents a ground-based, short-wave infrared camera system for measurements of the OH airglow originating in the middle atmosphere. The camera has a high temporal and spatial resolution of 0.5 s and 200 m (at 90 km height), which allows for detailed observations of atmospheric waves and other transient phenomena. Details regarding the instrument, calibration and preprocessing are discussed exemplarily for an event of two superposing gravity waves with associated instability structures.
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A novel infrared imaging instrument (OH imager) was put into operation in November 2022 at the Swedish Institute of Space Physics in Kiruna (Sweden). The OH imager is dedicated to the study of nightglow emissions coming from the hydroxyl (OH) and molecular oxygen (O2) layers in the mesopause (80–100 km). Based on a brightness ratio of two OH emission lines, the neutral temperature is estimated at around 87 km. The average daily winter temperature for the period January–April 2023 is 203±10 K.
Thomas Wagner and Jānis Puķīte
Atmos. Meas. Tech., 17, 277–297, https://doi.org/10.5194/amt-17-277-2024, https://doi.org/10.5194/amt-17-277-2024, 2024
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We present a radiance calibration method based on the comparison of measurements and radiative transfer simulations of the zenith-scattered sun radiance during twilight. Cloud-free conditions are required. The method can be applied to measurements in the filed, and no laboratory measurements are required. The accuracy is estimated to range from about 4 % at 340 nm to about 10 % at 700 nm.
Tobias Böck, Bernhard Pospichal, and Ulrich Löhnert
Atmos. Meas. Tech., 17, 219–233, https://doi.org/10.5194/amt-17-219-2024, https://doi.org/10.5194/amt-17-219-2024, 2024
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In this study, measurement uncertainties from microwave radiometers and their impact on temperature profiling are analyzed. These measurement uncertainties include horizontal inhomogeneities of the atmosphere, pointing errors or tilts of the instrument, physical obstacles which are in the line of sight of the radiometer, and radio frequency interferences. Impacts on temperature profiles from these uncertainties are usually small in real-life scenarios and when obstacles are far enough away.
Philipp Gasch, James Kasic, Oliver Maas, and Zhien Wang
Atmos. Meas. Tech., 16, 5495–5523, https://doi.org/10.5194/amt-16-5495-2023, https://doi.org/10.5194/amt-16-5495-2023, 2023
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This paper rethinks airborne wind measurements and investigates a new design for airborne Doppler lidar systems. Recent advances in lidar technology allow the use of multiple lidar systems with fixed viewing directions instead of a single lidar attached to a scanner. Our simulation results show that the proposed new design offers great potential for both higher accuracy and higher-resolution airborne wind measurements.
Christiane Duscha, Juraj Pálenik, Thomas Spengler, and Joachim Reuder
Atmos. Meas. Tech., 16, 5103–5123, https://doi.org/10.5194/amt-16-5103-2023, https://doi.org/10.5194/amt-16-5103-2023, 2023
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We combine observations from two scanning Doppler lidars to obtain new and unique insights into the dynamic processes inherent to atmospheric convection. The approach complements and enhances conventional methods to probe convection and has the potential to substantially deepen our understanding of this complex process, which is crucial to improving our weather and climate models.
Anna Špačková, Martin Fencl, and Vojtěch Bareš
Atmos. Meas. Tech., 16, 3865–3879, https://doi.org/10.5194/amt-16-3865-2023, https://doi.org/10.5194/amt-16-3865-2023, 2023
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Commercial microwave links as rainfall sensors have been investigated and evaluated in numerous studies with gauge-adjusted radar used for reference for rainfall observations. We evaluate collocated commercial microwave links, which are thus exposed to identical atmospheric conditions. This set-up enables the exploration of inconsistencies in observations of independent sensors using data from a real telecommunication network. The sensors are in agreement and are homogeneous in their behaviour.
Alessandro Battaglia, Filippo Emilio Scarsi, Kamil Mroz, and Anthony Illingworth
Atmos. Meas. Tech., 16, 3283–3297, https://doi.org/10.5194/amt-16-3283-2023, https://doi.org/10.5194/amt-16-3283-2023, 2023
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Some of the new generation of cloud and precipitation spaceborne radars will adopt conical scanning. This will make some of the standard calibration techniques impractical. This work presents a methodology to cross-calibrate radars in orbits by matching the reflectivity probability density function of ice clouds observed by the to-be-calibrated and by the reference radar in quasi-coincident locations. Results show that cross-calibration within 1 dB (26 %) is feasible.
Claudio Belotti, Flavio Barbara, Marco Barucci, Giovanni Bianchini, Francesco D'Amato, Samuele Del Bianco, Gianluca Di Natale, Marco Gai, Alessio Montori, Filippo Pratesi, Markus Rettinger, Christian Rolf, Ralf Sussmann, Thomas Trickl, Silvia Viciani, Hannes Vogelmann, and Luca Palchetti
Atmos. Meas. Tech., 16, 2511–2529, https://doi.org/10.5194/amt-16-2511-2023, https://doi.org/10.5194/amt-16-2511-2023, 2023
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FIRMOS (Far-Infrared Radiation Mobile Observation System) is a spectroradiometer measuring in the far-infrared, developed to support the preparation of the FORUM (Far-infrared Outgoing Radiation Understanding and Monitoring) satellite mission. In this paper, we describe the instrument, its data products, and the results of the comparison with a suite of observations made from a high-altitude site during a field campaign, in winter 2018–2019.
Christopher R. Williams, Joshua Barrio, Paul E. Johnston, Paytsar Muradyan, and Scott E. Giangrande
Atmos. Meas. Tech., 16, 2381–2398, https://doi.org/10.5194/amt-16-2381-2023, https://doi.org/10.5194/amt-16-2381-2023, 2023
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This study uses surface disdrometer observations to calibrate 8 years of 915 MHz radar wind profiler deployed in the central United States in northern Oklahoma. This study had two key findings. First, the radar wind profiler sensitivity decreased approximately 3 to 4 dB/year as the hardware aged. Second, this drift was slow enough that calibration can be performed using 3-month intervals. Calibrated radar wind profiler observations and Python processing code are available on public repositories.
Xin Fang, Feng Li, Lei-lei Sun, and Tao Li
Atmos. Meas. Tech., 16, 2263–2272, https://doi.org/10.5194/amt-16-2263-2023, https://doi.org/10.5194/amt-16-2263-2023, 2023
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We successfully developed the first pseudorandom modulation continuous-wave narrowband sodium lidar (PMCW-NSL) system for simultaneous measurements of the mesopause region's temperature and wind. Based on the innovative decoded technique and algorithm for CW lidar, both the main and residual lights modulated by M-code are used and directed to the atmosphere in the vertical and eastward directions, tilted 20° from the zenith. The PMCW-NSL system can applied to airborne and space-borne purposes.
Dana L. McGuffin, Philip J. Cameron-Smith, Matthew A. Horsley, Brian J. Bauman, Wim De Vries, Denis Healy, Alex Pertica, Chris Shaffer, and Lance M. Simms
Atmos. Meas. Tech., 16, 2129–2144, https://doi.org/10.5194/amt-16-2129-2023, https://doi.org/10.5194/amt-16-2129-2023, 2023
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This work demonstrates the viability of a remote sensing technique using nanosatellites to measure stratospheric temperature. This measurement technique can probe the stratosphere and mesosphere at a fine vertical scale around the globe unlike other high-altitude measurement techniques, which would provide an opportunity to observe atmospheric gravity waves and turbulence. We analyze observations from two satellite platforms to provide a proof of concept and characterize measurement uncertainty.
Benjamin Witschas, Sonja Gisinger, Stephan Rahm, Andreas Dörnbrack, David C. Fritts, and Markus Rapp
Atmos. Meas. Tech., 16, 1087–1101, https://doi.org/10.5194/amt-16-1087-2023, https://doi.org/10.5194/amt-16-1087-2023, 2023
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In this paper, a novel scan technique is applied to an airborne coherent Doppler wind lidar, enabling us to measure the vertical wind speed and the horizontal wind speed along flight direction simultaneously with a horizontal resolution of about 800 m and a vertical resolution of 100 m. The performed observations are valuable for gravity wave characterization as they allow us to calculate the leg-averaged momentum flux profile and, with that, the propagation direction of excited gravity waves.
Kevin J. Nelson, Feiqin Xie, Bryan C. Chan, Ashish Goel, Jonathan Kosh, Tyler G. R. Reid, Corey R. Snyder, and Paul M. Tarantino
Atmos. Meas. Tech., 16, 941–954, https://doi.org/10.5194/amt-16-941-2023, https://doi.org/10.5194/amt-16-941-2023, 2023
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Global Navigation Satellite System (GNSS) radio occultation (RO) remote sensing is effective for atmospheric profiling. The capability of a low-cost and scalable commercial off-the-shelf (COTS) GNSS receiver on board high-altitude balloons is tested in two campaigns. Preliminary results demonstrate high-quality refractivity observations from the COTS RO receiver, which is worth further improvement for dense atmospheric observations over a targeted region.
Jenna Ritvanen, Ewan O'Connor, Dmitri Moisseev, Raisa Lehtinen, Jani Tyynelä, and Ludovic Thobois
Atmos. Meas. Tech., 15, 6507–6519, https://doi.org/10.5194/amt-15-6507-2022, https://doi.org/10.5194/amt-15-6507-2022, 2022
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Doppler lidars and weather radars provide accurate wind measurements, with Doppler lidar usually performing better in dry weather conditions and weather radar performing better when there is precipitation. Operating both instruments together should therefore improve the overall performance. We investigate how well a co-located Doppler lidar and X-band radar perform with respect to various weather conditions, including changes in horizontal visibility, cloud altitude, and precipitation.
Bhupal Shrestha, Jerald A. Brotzge, and Junhong Wang
Atmos. Meas. Tech., 15, 6011–6033, https://doi.org/10.5194/amt-15-6011-2022, https://doi.org/10.5194/amt-15-6011-2022, 2022
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The NYS Mesonet Profiler Network is comprised of 17 profiler sites, each equipped with a Doppler lidar, microwave radiometer, and sun photometer. This study presents a multi-year, multi-station evaluation based on well-defined reference measurements. Results demonstrate robust technologies that can aid real-time weather operations and a network test bed that can be used for further expansion, evaluation, and integration of such technologies at a large scale.
Felix Kelberlau and Jakob Mann
Atmos. Meas. Tech., 15, 5323–5341, https://doi.org/10.5194/amt-15-5323-2022, https://doi.org/10.5194/amt-15-5323-2022, 2022
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Floating lidar systems are used for measuring wind speeds offshore, and their motion influences the measurements. This study describes the motion-induced bias on mean wind speed estimates by simulating the lidar sampling pattern of a moving lidar. An analytic model is used to validate the simulations. The bias is low and depends on amplitude and frequency of motion as well as on wind shear. It has been estimated for the example of the Fugro SEAWATCH wind lidar buoy carrying a ZX 300M lidar.
Alessandro Battaglia, Paolo Martire, Eric Caubet, Laurent Phalippou, Fabrizio Stesina, Pavlos Kollias, and Anthony Illingworth
Atmos. Meas. Tech., 15, 3011–3030, https://doi.org/10.5194/amt-15-3011-2022, https://doi.org/10.5194/amt-15-3011-2022, 2022
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We present an instrument simulator for a new sensor, WIVERN (WInd VElocity Radar Nephoscope), a conically scanning radar payload with Doppler capabilities, recently down-selected as one of the four candidates for the European Space Agency Earth Explorer 11 program. The mission aims at measuring horizontal winds in cloudy areas. The simulator is instrumental in the definition and consolidation of the mission requirements and the evaluation of mission performances.
James B. Duncan Jr., Laura Bianco, Bianca Adler, Tyler Bell, Irina V. Djalalova, Laura Riihimaki, Joseph Sedlar, Elizabeth N. Smith, David D. Turner, Timothy J. Wagner, and James M. Wilczak
Atmos. Meas. Tech., 15, 2479–2502, https://doi.org/10.5194/amt-15-2479-2022, https://doi.org/10.5194/amt-15-2479-2022, 2022
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In this study, several ground-based remote sensing instruments are used to estimate the height of the convective planetary boundary layer, and their performance is compared against independent boundary layer depth estimates obtained from radiosondes launched as part of the CHEESEHEAD19 field campaign. The impact of clouds (particularly boundary layer clouds) on the estimation of the boundary layer depth is also investigated.
Vicki Kelsey, Spencer Riley, and Kenneth Minschwaner
Atmos. Meas. Tech., 15, 1563–1576, https://doi.org/10.5194/amt-15-1563-2022, https://doi.org/10.5194/amt-15-1563-2022, 2022
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In the interior western USA there are distances of hundreds of kilometers between weather balloon launch sites for weather forecasting. Satellite coverage can also be sparse or with poor resolution. Using infrared thermometers, clear-sky temperatures were collected and compared with data from weather balloons. A correlation between clear-sky temperatures and precipitable water measurements from weather balloons was found. This means that citizen scientists can collect data.
Benjamin Witschas, Christian Lemmerz, Oliver Lux, Uwe Marksteiner, Oliver Reitebuch, Fabian Weiler, Frederic Fabre, Alain Dabas, Thomas Flament, Dorit Huber, and Michael Vaughan
Atmos. Meas. Tech., 15, 1465–1489, https://doi.org/10.5194/amt-15-1465-2022, https://doi.org/10.5194/amt-15-1465-2022, 2022
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In August 2018, the ESA launched the first Doppler wind lidar into space. In order to calibrate the instrument and to monitor the overall instrument conditions, instrument spectral registration measurements have been performed with Aeolus on a weekly basis. Based on these measurements, the alignment drift of the Aeolus satellite instrument is estimated by applying tools and mathematical model functions to analyze the spectrometer transmission curves.
Joseph J. Michalsky and Peter W. Kiedron
Atmos. Meas. Tech., 15, 353–364, https://doi.org/10.5194/amt-15-353-2022, https://doi.org/10.5194/amt-15-353-2022, 2022
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This paper describes an instrument that measures spectrally from 360 nm (ultraviolet) to 1070 nm (near-infrared) at 1002 separate wavelengths. The measurements were made every minute from the late summer of 2009 to the winter of 2014 at a site in northern Oklahoma (USA; 36.605° N, 97.486° W). Methods are described that enable the normalized transmission across the spectrum to be measured and, subsequently, used to calculate the aerosol optical depth and spectra irradiance.
Julien Totems, Patrick Chazette, and Alexandre Baron
Atmos. Meas. Tech., 14, 7525–7544, https://doi.org/10.5194/amt-14-7525-2021, https://doi.org/10.5194/amt-14-7525-2021, 2021
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We describe in detail the design and calibration of the new Raman channels for the WALI system, going over the important sources of bias and uncertainty on retrieved temperature profiles. For the first time, their impact is investigated using horizontal shots in a homogenous atmosphere: the magnitude of the highlighted biases can be much larger than the targeted absolute accuracy of 1° C. Actual measurement errors are quantified using radiosoundings launched close to the lidar site.
Oliver Lux, Christian Lemmerz, Fabian Weiler, Thomas Kanitz, Denny Wernham, Gonçalo Rodrigues, Andrew Hyslop, Olivier Lecrenier, Phil McGoldrick, Frédéric Fabre, Paolo Bravetti, Tommaso Parrinello, and Oliver Reitebuch
Atmos. Meas. Tech., 14, 6305–6333, https://doi.org/10.5194/amt-14-6305-2021, https://doi.org/10.5194/amt-14-6305-2021, 2021
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The work assesses the frequency stability of the laser transmitters on board Aeolus and discusses its influence on the quality of the global wind data. Excellent frequency stability of the space lasers is evident, although enhanced frequency noise occurs at certain locations along the orbit due to micro-vibrations that are introduced by the satellite’s reaction wheels. The study elaborates on this finding and investigates the extent to which the enhanced frequency noise increases the wind error.
Tingyu Yan, Jeffery A. Langille, William E. Ward, William A. Gault, Alan Scott, Andrew Bell, Driss Touahiri, Sheng-Hai Zheng, and Chunmin Zhang
Atmos. Meas. Tech., 14, 6213–6232, https://doi.org/10.5194/amt-14-6213-2021, https://doi.org/10.5194/amt-14-6213-2021, 2021
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High-resolution interferometers are routinely used to measure upper atmospheric motions by measuring small Doppler shifts in spectrally isolated airglow emissions. The birefringent interferometer presented in this paper has similar capabilities as several existing state-of-the-art instruments but is smaller and less complex to construct and operate. This paper presents the measurement technique and characterization of a lab prototype and examines the performance of the instrument.
Etienne Cheynet, Martin Flügge, Joachim Reuder, Jasna B. Jakobsen, Yngve Heggelund, Benny Svardal, Pablo Saavedra Garfias, Charlotte Obhrai, Nicolò Daniotti, Jarle Berge, Christiane Duscha, Norman Wildmann, Ingrid H. Onarheim, and Marte Godvik
Atmos. Meas. Tech., 14, 6137–6157, https://doi.org/10.5194/amt-14-6137-2021, https://doi.org/10.5194/amt-14-6137-2021, 2021
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The COTUR campaign explored the structure of wind turbulence above the ocean to improve the design of future multi-megawatt offshore wind turbines. Deploying scientific instruments offshore is both a financial and technological challenge. Therefore, lidar technology was used to remotely measure the wind above the ocean from instruments located on the seaside. The experimental setup is tailored to the study of the spatial correlation of wind gusts, which governs the wind loading on structures.
Fabian Weiler, Thomas Kanitz, Denny Wernham, Michael Rennie, Dorit Huber, Marc Schillinger, Olivier Saint-Pe, Ray Bell, Tommaso Parrinello, and Oliver Reitebuch
Atmos. Meas. Tech., 14, 5153–5177, https://doi.org/10.5194/amt-14-5153-2021, https://doi.org/10.5194/amt-14-5153-2021, 2021
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This paper reports on dark current signal anomalies of the detectors used on board the ESA's Earth Explorer satellite Aeolus during the first 1.5 years in orbit. After introducing sophisticated algorithms to classify dark current anomalies according to their characteristics, the impact of the different kinds of anomalies on wind measurements is discussed. In addition, mitigation approaches for the wind retrieval are presented and potential root causes are discussed.
Chuanliang Zhang, Xuejin Sun, Wen Lu, Yingni Shi, Naiying Dou, and Shaohui Li
Atmos. Meas. Tech., 14, 4787–4803, https://doi.org/10.5194/amt-14-4787-2021, https://doi.org/10.5194/amt-14-4787-2021, 2021
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The first spaceborne doppler wind lidar (DWL) Aeolus operates on sun-synchronous dawn–dusk orbit to lower the impact of solar background radiation (SBR) on wind observation accuracy. Increased SBR leads to an increment of averaged wind observation uncertainties from 0.19 to 0.27 m s-1 comparing Aeolus and two added spaceborne DWLs operating on orbits with local ascending times of 15:00 and 12:00 LT. A quantitative design of laser pulse energy according to accuracy requirements is also proposed.
Didier Bruneau and Jacques Pelon
Atmos. Meas. Tech., 14, 4375–4402, https://doi.org/10.5194/amt-14-4375-2021, https://doi.org/10.5194/amt-14-4375-2021, 2021
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Taking advantage of Aeolus success and of our airborne lidar system expertise, we present a new spaceborne wind lidar design for operational Aeolus follow-on missions, keeping most of the initial lidar system but relying on a single Mach–Zehnder interferometer to relax operational constraints and reduce measurement bias. System parameters are optimized. Random and systematic errors are shown to be compliant with the initial mission requirements. In addition, the system allows unbiased retrieval.
Franz-Josef Lübken and Josef Höffner
Atmos. Meas. Tech., 14, 3815–3836, https://doi.org/10.5194/amt-14-3815-2021, https://doi.org/10.5194/amt-14-3815-2021, 2021
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We present a new concept for a cluster of lidars that allows us to measure time-resolved profiles of temperatures, winds, and aerosols in the entire middle atmosphere for the first time, also covering regional horizontal scales (
four-dimensional coverage). Measurements are performed during day and night. The essential component is a newly developed laser with unprecedented performance. We present the first measurements. New observational capabilities in atmospheric physics are established.
Bernd Kaifler and Natalie Kaifler
Atmos. Meas. Tech., 14, 1715–1732, https://doi.org/10.5194/amt-14-1715-2021, https://doi.org/10.5194/amt-14-1715-2021, 2021
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This paper describes the Compact Rayleigh Autonomous Lidar (CORAL), which is the first lidar instrument to make fully automatic high-resolution measurements of atmospheric density and temperature between 15 and 90 km altitude. CORAL achieves a much larger measurement cadence than conventional lidars and thus facilitates studies of rare atmospheric phenomena.
Mareike Heckl, Andreas Fix, Matthias Jirousek, Franz Schreier, Jian Xu, and Markus Rapp
Atmos. Meas. Tech., 14, 1689–1713, https://doi.org/10.5194/amt-14-1689-2021, https://doi.org/10.5194/amt-14-1689-2021, 2021
William Thielicke, Waldemar Hübert, Ulrich Müller, Michael Eggert, and Paul Wilhelm
Atmos. Meas. Tech., 14, 1303–1318, https://doi.org/10.5194/amt-14-1303-2021, https://doi.org/10.5194/amt-14-1303-2021, 2021
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We developed a wind-measuring drone with exceptional measuring accuracy and a very long flight time. Measurements are extensively validated at different levels. A comparison with a bistatic lidar reveals very small bias and RMSEs. We also present a demonstration measurement in the wake of a wind turbine. We think that our solution is a significant enhancement to existing designs, and other researchers can benefit from the details that we are giving in the paper.
Martin Fencl, Michal Dohnal, Pavel Valtr, Martin Grabner, and Vojtěch Bareš
Atmos. Meas. Tech., 13, 6559–6578, https://doi.org/10.5194/amt-13-6559-2020, https://doi.org/10.5194/amt-13-6559-2020, 2020
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Commercial microwave links operating at E-band frequencies are increasingly being updated and are frequently replacing older infrastructure. We show that E-band microwave links are able to observe even light rainfalls, a feat practically impossible to achieve by older 15–40 GHz devices. Furthermore, water vapor retrieval may be possible from long E-band microwave links, although the efficient separation of gaseous attenuation from other signal losses will be challenging in practice.
Yuan An, Jinji Ma, Yibo Gao, Wei Xiong, and Xianhua Wang
Atmos. Meas. Tech., 13, 6521–6542, https://doi.org/10.5194/amt-13-6521-2020, https://doi.org/10.5194/amt-13-6521-2020, 2020
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The hydroxyl radical (OH) plays a significant role in atmospheric chemical and physical reactions. The superiority and feasibility of a new satellite sensor, which consists of two spatial heterodyne spectrometers in the orthogonal layout to monitor OH in the middle and upper atmosphere, is proved by the forward model. An inversion algorithm to obtain OH concentrations based on the simulated observation data of sensors and the errors in results are also given.
Lei Qiao, Gang Chen, Shaodong Zhang, Qi Yao, Wanlin Gong, Mingkun Su, Feilong Chen, Erxiao Liu, Weifan Zhang, Huangyuan Zeng, Xuesi Cai, Huina Song, Huan Zhang, and Liangliang Zhang
Atmos. Meas. Tech., 13, 5697–5713, https://doi.org/10.5194/amt-13-5697-2020, https://doi.org/10.5194/amt-13-5697-2020, 2020
F. Joseph Turk, Svetla Hristova-Veleva, Stephen L. Durden, Simone Tanelli, Ousmane Sy, G. David Emmitt, Steve Greco, and Sara Q. Zhang
Atmos. Meas. Tech., 13, 4521–4537, https://doi.org/10.5194/amt-13-4521-2020, https://doi.org/10.5194/amt-13-4521-2020, 2020
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The mechanisms linking convection and air motion are major factors in much of the uncertainty in weather prediction, but complementary measurements of these quantities are rarely taken in close proximity. These quantities are shown from the 2017 Convective Processes Experiment (CPEX), wherein cloud and vertical air motion winds derived from the APR-2 airborne Doppler radar are combined with joint Doppler wind lidar (DAWN) measurements in the aerosol-rich regions surrounding the convection.
Alex T. Chartier, Juha Vierinen, and Geonhwa Jee
Atmos. Meas. Tech., 13, 3023–3031, https://doi.org/10.5194/amt-13-3023-2020, https://doi.org/10.5194/amt-13-3023-2020, 2020
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A novel oblique ionospheric radio sounder has been developed and demonstrated in Antarctica. The transmitter was located at McMurdo and the receiver at the South Pole (1356 km great-circle path). The system cycled through 12 frequencies each minute and recorded signal time of flight, intensity, and Doppler. This allowed for the estimation of peak ionospheric electron density, which validated well against independent data from the nearby Jang Bogo ionosonde and GPS TEC.
Cited articles
Adams, G. W., Peterson, A. W., Brosnahan, J. W., and Neuschaefer, J. W.:
Radar and optical observations of mesospheric wave activity during the lunar
eclipse of 6 July 1982, J. Atmos. Terr. Phys., 50, 11–20, 1988.
Andreassen, Ø., Wasberg, C. E., Fritts, D. C., and Isler, J. R.: Gravity
wave breaking in two and three dimensions 1. Model description and
comparison of two-dimensional evolutions, J. Geophys. Res., 99, 8095–8108,
1994.
Bacmeister, J. T. and Schoeberl, M. R.: Breakdown of vertically
propagating two-dimensional gravity waves forced by orography, J. Atmos.
Sci., 46, 2109–2134, 1989.
Baker, D. J. and Stair, A. T.: Rocket Measurements of the Altitude
Distributions of the Hydroxyl Airglow, Phys. Scripta, 37, 611–622,
https://doi.org/10.1088/0031-8949/37/4/021, 1988.
Baumgarten, G. and Fritts, D. C.: Quantifying Kelvin-Helmholtz instability
dynamics observed in noctilucent clouds: 1. Methods and observations, J.
Geophys. Res.-Atmos., 119, 9324–9337, https://doi.org/10.1002/2014JD021832, 2014.
Becker, E. and Vadas, S. L.: Secondary Gravity Waves in the Winter
Mesosphere: Results From a High-Resolution Global Circulation Model, J.
Geophys. Res.-Atmos., 123, 2605–2627,
https://doi.org/10.1002/2017JD027460, 2018.
Beldon, C. L. and Mitchell, N. J.: Gravity waves in the mesopause region
observed by meteor radar, 2: Climatologies of gravity waves in the Antarctic
and Arctic, J. Atmos. Sol.-Terr. Phy., 71, 875–884,
https://doi.org/10.1016/j.jastp.2009.03.009, 2009.
Bittner, M., Offermann, D., and Graef, H. H.: Mesopause temperature
variability above a midlatitude station in Europe, J. Geophys. Res.,
105, 2045–2058, 2000.
Bossert, K., Kruse, C. G., Heale, C. J., Fritts, D. C., Williams, B. P.,
Snively, J. B., Pautet, P.-D., and Taylor, M. J.: . Secondary gravity wave
generation over New Zealand during the DEEPWAVE campaign, J.
Geophys. Res.-Atmos., 122, 7834–7850,
https://doi.org/10.1002/2016JD026079, 2017.
Browning, K. A.: Structure of the atmosphere in the vicinity of
large-amplitude Kelvin–Helmholtz billows, Q. J. Roy. Meteor. Soc., 97,
283–299, 1971.
Chau, J. L., Urco, J. M., Avsarkisov, V., Vierinen, J. P., Latteck, R.,
Hall, C. M., and Tsutsumi, M.: Four-Dimensional Quantification of
Kelvin-Helmholtz Instabilities in the Polar Summer Mesosphere Using
Volumetric Radar Imaging, Geophys. Res. Let., 47, e2019GL086081,
https://doi.org/10.1029/2019GL086081, 2020.
de la Cámara, A., Lott, F., and Abalos, M.: Climatology of the middle
atmosphere in LMDz: Impact of source-related parameterizations of gravity
wave drag, J. Adv. Model. Earth Syst., 8, 1507–1525,
https://doi.org/10.1002/2016MS000753, 2016.
Espy, P. J. and Stegman, J.: Trends and variability of mesospheric
temperature at high-latitudes, Phys. Chem. Earth, 27, 543–553, 2002.
Espy, P. J., Hibbins, R. E., Jones, G. O. L., Riggin, D. M., and Fritts, D.
C.: Rapid, large-scale temperature changes in the polar mesosphere and their
relationship to meridional flows, Geophys. Res. Lett., 30,
1240, https://doi.org/10.1029/2002GL016452, 2003.
Franke, P. M. and Robinson, W. A.: Nonlinear behaviour in the propagation of
atmospheric gravity waves, J. Atmos. Sci., 56, 3010–3027, 1999.
French, W. J. R. and Burns, G. B.: The influence of large-scale
oscillations on long-term trend assessment in hydroxyl temperatures over
Davis, Antarctica, J. Atmos. Sol.-Terr. Phys., 66, 493–506,
https://doi.org/10.1016/j.jastp.2004.01.027, 2004.
Fritts, D. C. and Alexander, M. J.: Gravity wave dynamics and effects in the
middle atmosphere, Rev. Geophys., 41, 1003, https://doi.org/10.1029/2001RG000106,
2003.
Fritts, D. C., Garten, J. F., and Andreassen, Ø.: Wave breaking and
transition to turbulence in stratified shear flows, J. Atmos. Sci., 53,
1057–1085, 1996.
Fritts, D. C., Isler, J. R., Hecht, J. H., Walterscheid, R. L., and Andreassen, O.: Wave breaking signatures in sodium densities and OH nightglow.
2. Simulation of wave and instability structures, J. Geophys. Res., 102,
6669–6684, https://doi.org/10.1029/96JD01902, 1997.
Gardner, C. S., Zhao, Y., and Liu, A. Z.: Atmospheric stability and gravity
wave dissipation in the mesopause region, J. Atmos. Sol.-Terr. Phy., 64,
923–929, 2002.
Gargett, A. E.: Velcro Measurement of Turbulence Kinetic Energy Dissipation
Rate ϵ, J. Atmos. Ocean. Tech., 16, 1973–1993, 1999.
Hannawald, P., Schmidt, C., Wüst, S., and Bittner, M.: A fast SWIR imager for observations of transient features in OH airglow, Atmos. Meas. Tech., 9, 1461–1472, https://doi.org/10.5194/amt-9-1461-2016, 2016.
Hannawald, P., Schmidt, C., Sedlak, R., Wüst, S., and Bittner, M.: Seasonal and intra-diurnal variability of small-scale gravity waves in OH airglow at two Alpine stations, Atmos. Meas. Tech., 12, 457–469, https://doi.org/10.5194/amt-12-457-2019, 2019.
Hecht, J. H.: Instability layers and airglow imaging, Review of Geophysics, 42, RG1001, https://doi.org/10.1029/2003RG000131, 2004.
Hecht, J. H., Walterscheid, R. L., Fritts, D. C., Isler, J. R., Senft, D.
C., Gardner, C. S., and Franke, S. J.: Wave breaking signatures in OH
airglow and sodium densities and temperatures 1. Airglow imaging, Na lidar,
and MF radar observations, J. Geophys. Res., 102, 6655–6668, 1997.
Hecht, J. H., Fricke-Begemann, C., Walterscheid, R. L., and Höffner, J.:
Observations of the breakdown of an atmospheric gravity wave near the cold
summer mesopause at 54N, Geophys. Res. Lett., 27, 879–882,
https://doi.org/10.1029/1999GL010792, 2000.
Hecht, J. H., Wan, K., Gelinas, L. J., Fritts, D. C., Walterscheid, R. L.,
Rudy, R. J., Liu, A. Z., Franke, S. J., Vargas, F. A., Pautet, P. D.,
Taylor, M. J., and Swenson, G. R.: The life cycle of instability features
measured from the Andes Lidar Observatory over Cerro Pachon on 24 March
2012, J. Geophys. Res.-Atmos., 119, 8872–8898, 2014.
Hecht, J. H., Fritts, D. C., Gelinas, L. J., Rudy, R. J., Walterscheid, R.
L., and Liu, A. Z.: Kelvin-Helmholtz Billow Interactions and Instabilities
in the Mesosphere Over the Andes Lidar Observatory: 1. Observations, J. Geophys. Res.-Atmos., 126, e2020JD033414, https://doi.org/10.1029/2020JD033414, 2021.
Hines, C. O. and Tarasick, D. W.: On the detection and utilization of gravity
waves in airglow studies, Planet. Space Sci., 35, 851–866,
https://doi.org/10.1016/0032-0633(87)90063-8, 1987.
Hocking, W. K.: Measurement of turbulent energy dissipation rates in the
middle atmosphere by radar techniques: A review, Radio Sci., 20, 1403–1422,
1985.
Hocking, W. K.: The dynamical parameters of turbulence theory as they apply
to middle atmosphere studies, Earth Planets Space, 51, 525–541, 1999.
Hoffmann P., Becker, E., Singer, W., and Placke, M.: Seasonal variation of
mesospheric waves at northern middle and high latitudes, J. Atmos.
Sol.-Terr. Phy., 72, 1068–1079, 2010.
Holton, J. R.: The influence of gravity wave breaking on the general
circulation of the middle atmosphere, J. Atmos. Sci., 40, 2497–2507,
1983.
Holton, J. R. and Alexander, M. J.: Gravity waves in the mesosphere
generated by tropospheric convection, Tellus, 51A-B, 45–58, 1999.
Li, J., Li, T., Dou, X., Fang, X., Cao, B., She, C.-Y., Nakamura, T.,
Manson, A., Meek, C., and Thorsen, D.: Characteristics of ripple structures
revealed in OH airglow images, J. Geophys. Res.-Space, 122,
3748–3759, https://doi.org/10.1002/2016JA023538, 2017.
Li, Z., Liu, A. Z., Lu, X., Swenson, G. R., and Franke, S. J.: Gravity wave
characteristics from OH airglow imager over Maui, J. Geophys. Res., 116, D22115, https://doi.org/10.1029/2011JD015870, 2011.
Lindzen, R. S.: Turbulence and stress owing to gravity wave and tidal
breakdown, J. Geophys. Res.-Oceans, 86, 9707–9714, 1981.
Liu, G. and Shepherd, G. G.: An empirical model for the altitude of the OH
nightglow emission, Geophys. Res. Let., 33, L09805,
https://doi.org/10.1029/2005GL025297, 2006.
Lübken, F.-J.: Seasonal variation of turbulent energy dissipation rates
at high latitudes as determined by in situ measurements of neutral density
fluctuations, J. Geophys. Res., 102, 13441–13456, 1997.
Lübken, F.-J., von Zahn, U., Thrane, E. V., Blix, T., Kokin, G. A., and
Pachomov, S. V.: In situ measurements of turbulent energy dissipation rates
and eddy diffusion coefficients during MAP/WINE, J. Atmos. Terr. Phys.,
49, 763–775, 1987.
Lübken, F.-J., Rapp, M., and Hofmann, P.: Neutral air turbulence and
temperatures in the vicinity of polar mesospheric summer echoes, J. Geophys.
Res., 107, 4273, https://doi.org/10.1029/2001JD000915, 2002.
Marsh, D. R.: Chemical-Dynamical Coupling in the Mesosphere and Lower
Thermosphere, Aeronomy of the Earth's Atmosphere and Ionosphere, IAGA Special Sopron Book
Series 2, edited by: Abdu,
M. A. and Pancheva, D., Coed. Bhattacharyya, A., Springer
Science+Business Media B. V., Dordrecht, the Netherlands, https://doi.org/10.1007/978-94-007-0326-1_1, 2011.
Moreels, G., Clairemidi, J., Faivre, M., Mougin-Sisini, D., Kouahla, M. N.,
Meriwether, J. W., Lehmacher, G. A., Vidal, E., and Veliz, O.: Stereoscopic
imaging of the hydroxyl emissive layer at low latitudes, Planet. Space Sci.,
56, 1467–1479, 2008.
Mulligan, F. J., Horgan, D. F., Galligan, J. G., and Griffin, E. M.: Mesopause
temperatures and integrated band brightnesses calculated from airglow OH
emissions recorded at Maynooth (53.21N, 6.41W) during 1993, J.
Atmos. Terr. Phys. 57, 1623–1637, 1995.
Nakamura, T., Higashikawa, A., Tsuda, T., and Matsuhita, Y.: Seasonal
variations of gravity wave structures in OH airglow with a CCD imager at
Shigaraki, Earth Planets Space, 51, 897–906, 1999.
Offermann, D., Gusev, O.,
Donner, M., Forbes, J. M., Hagan, M., Mlynczak, M. G., Oberheide, J.,
Preusse, P., Schmidt, H., and Russell III, J. M.: Relative intensities of
middle atmosphere waves, J. Geophys. Res., 114, D06110,
https://doi.org/10.1029/2008JD010662, 2009.
Pautet, P. D., Taylor, M. J., Pendleton, W. R., Zhao, Y., Yuan, T., Esplin,
R., and McLain, D.: Advanced mesospheric temperature mapper for
high-latitude airglow studies, Appl. Opt., 53, 5934–5943, 2014.
Peterson, A. W.: Airglow events visible to the naked eye, Appl. Optics, 18,
3390–3393, https://doi.org/10.1364/AO.18.003390, 1979.
Peterson, A. W. and Kieffaber, L. M.: Infrared Photography of OH Airglow
Structures, Nature, 242, 321–322, 1973.
Reisin, E. R. and Scheer, J.: Vertical propagation of gravity waves
determined from zenith observations of airglow, Adv. Space Res., 27,
1743–1748, 2001.
Satomura, T. and Sato, K.: Secondary generation of gravity waves associated
with the breaking of mountain waves, J. Atmos. Sci., 56, 3847–3858,
1999.
Schmidt, C., Höppner, K., and Bittner, M.: A ground-based spectrometer
equipped with an InGaAs array for routine observations of OH(3-1) rotational
temperatures in the mesopause region, J. Atmos. Sol.-Terr. Phy., 102,
125–139, 2013.
Schmidt, C., Dunker, T., Lichtenstern, S., Scheer, J., Wüst, S., Hoppe,
U.-P., and Bittner, M.: Derivation of vertical wavelengths of gravity waves
in the MLT-region from multispectral airglow observations, J. Atmos.
Sol.-Terr. Phy., 173, 119–127, 2018.
Schmidt, C., Wüst, S., Stanic, S., and Bittner, M.: One minute mean values OH(3-1) airglow rotational temperatures from the mesopause region obtained with GRIPS 9 at Otlica, Slovenia, ndmc [data set], available at: https://ndmc.dlr.de/operational-data-products, last access: 16 October 2021.
Sedlak, R., Hannawald, P., Schmidt, C., Wüst, S., and Bittner, M.: High-resolution observations of small-scale gravity waves and turbulence features in the OH airglow layer, Atmos. Meas. Tech., 9, 5955–5963, https://doi.org/10.5194/amt-9-5955-2016, 2016.
Sedlak, R., Zuhr, A., Schmidt, C., Wüst, S., Bittner, M., Didebulidze, G. G., and Price, C.: Intra-annual variations of spectrally resolved gravity wave activity in the upper mesosphere/lower thermosphere (UMLT) region, Atmos. Meas. Tech., 13, 5117–5128, https://doi.org/10.5194/amt-13-5117-2020, 2020.
Silber, I., Price, C., Schmidt, C., Wüst, S., Bittner, M., and Pecora, E.: First ground-based observations of mesopause temperatures above the Eastern-Mediterranean Part I: Multi-day oscillations and tides, J. Atmos. Sol.-Terr. Phy., 155, 95–103, 2016.
Smith, S., Baumgardner, J., and Mendillo, M.: Evidence of mesospheric
gravity-waves generated by orographic forcing in the troposphere, Geophys.
Res. Lett., 36, L08807,
https://doi.org/10.1029/2008GL036936, 2009.
Taylor, M. J.: A review of advances in imaging techniques for measuring
short period gravity waves in the mesosphere and lower thermosphere, Adv.
Space Res., 19, 667–676, 1997.
Taylor, M. J. and Hapgood, M. A.: On the origin of ripple-type wave
structure in the OH nightglow emission, Planet. Space Sci., 38, 1421–1430,
1990.
Tuan, T. F., Hedinger, R., Silverman, S. M., and Okuda, M.: On gravity wave
induced Brunt-Vaisala oscillations, J. Geophys. Res.-Space, 84,
393–398, 1979.
Vadas, S. L. and Becker, E.: Numerical Modeling of the Excitation,
Propagation, and Dissipation of Primary and Secondary Gravity Waves during
Wintertime at McMurdo Station in the Antarctic, J. Geophys. Res.-Atmos., 123, 9326–9369, 2018.
Vadas, S. L. and Fritts, D. C.: Gravity wave radiation and mean responses to
local body forces in the atmosphere, J. Atmos. Sci., 58, 2249–2279, https://doi.org/10.1175/1520-0469(2001)058<2249:GWRAMR>2.0.CO;2, 2001.
Vadas, S. L., Zhao, J., Chu, X., and Becker, E.: The Excitation of secondary
gravity waves from local body forces: Theory and observation, J. Geophys.
Res.-Atmos., 123, 9296–9325,
https://doi.org/10.1029/2017JD027974, 2018.
Wachter, P., Schmidt, C., Wüst, S., and Bittner, M.: Spatial gravity
wave characteristics obtained from multiple OH(3-1) airglow temperature time
series, J. Atmos. Sol.-Terr. Phy., 135, 192–201, 2015.
The World Data Center for Remote Sensing of the Atmosphere: The World Data Center for Remote Sensing of the Atmosphere, https://wdc.dlr.de/, last access: 16 October 2021.
Wüst, S., Wendt, V., Schmidt, C., Lichtenstern, S., Bittner, M., Yee,
J.-H., Mlynczak, M. G., and Russell III, J. M.: Derivation of gravity wave
potential energy density from NDMC measurements, J. Atmos. Sol.-Terr. Phys.,
138, 32–46, https://doi.org/10.1016/j.jastp.2015.12.003, 2016.
Wüst, S., Schmidt, C., Bittner, M., Silber, I., Price, C., Yee, J.-H.,
Mlynczak, M. G., and Russel III, J. M.: First ground-based observations of
mesopause temperatures above the Eastern-Mediterranean Part II:
OH*-climatology and gravity wave activity, J. Atmos. Sol.-Terr. Phys., 155,
104–111, 2017a.
Wüst, S., Bittner, M., Yee, J.-H., Mlynczak, M. G., and Russell III, J. M.: Variability of the Brunt–Väisälä frequency at the OH* layer height, Atmos. Meas. Tech., 10, 4895–4903, https://doi.org/10.5194/amt-10-4895-2017, 2017b.
Wüst, S., Offenwanger, T., Schmidt, C., Bittner, M., Jacobi, C., Stober, G., Yee, J.-H., Mlynczak, M. G., and Russell III, J. M.: Derivation of gravity wave intrinsic parameters and vertical wavelength using a single scanning OH(3-1) airglow spectrometer, Atmos. Meas. Tech., 11, 2937–2947, https://doi.org/10.5194/amt-11-2937-2018, 2018.
Wüst, S., Schmidt, C., Hannawald, P., Bittner, M., Mlynczak, M. G., and Russell III, J. M.: Observations of OH airglow from ground, aircraft, and satellite: investigation of wave-like structures before a minor stratospheric warming, Atmos. Chem. Phys., 19, 6401–6418, https://doi.org/10.5194/acp-19-6401-2019, 2019.
Wüst, S., Bittner, M., Yee, J.-H., Mlynczak, M. G., and Russell III, J. M.: Variability of the Brunt–Väisälä frequency at the OH*-airglow layer height at low and midlatitudes, Atmos. Meas. Tech., 13, 6067–6093, https://doi.org/10.5194/amt-13-6067-2020, 2020.
Yuan, T., She, C.-Y., Krueger, D. A., Sassi, F., Garcia, R., Roble, R. G.,
Liu, H.-L., and Schmidt, H.: Climatology of mesopause region temperature,
zonal wind, and meridional wind over Fort Collins, Colorado (41∘ N, 105∘ W),
and comparison with model simulations, J. Geophys. Res., 113, D03105,
https://doi.org/10.1029/2007JD008697, 2008.
Short summary
High-resolution images of the OH* airglow layer (ca. 87 km height) acquired at Otlica Observatory, Slovenia, have been analysed. A statistical analysis of small-scale wave structures with horizontal wavelengths up to 4.5 km suggests strong presence of instability features in the upper mesosphere or lower thermosphere. The dissipated energy of breaking gravity waves is derived from observations of turbulent vortices. It is concluded that dynamical heating plays a vital role in the atmosphere.
High-resolution images of the OH* airglow layer (ca. 87 km height) acquired at Otlica...
