Articles | Volume 37, issue 5
https://doi.org/10.5194/angeo-37-943-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/angeo-37-943-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
10 Oct 2019
Regular paper |
| 10 Oct 2019
| 10 Oct 2019
Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation
Friederike Lilienthal
CORRESPONDING AUTHOR
Institute for Meteorology, Universität Leipzig, Stephanstr. 3, 04103 Leipzig, Germany
Christoph Jacobi
Institute for Meteorology, Universität Leipzig, Stephanstr. 3, 04103 Leipzig, Germany
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Christoph Jacobi, Friederike Lilienthal, Dmitry Korotyshkin, Evgeny Merzlyakov, and Gunter Stober
Adv. Radio Sci., 19, 185–193, https://doi.org/10.5194/ars-19-185-2021, https://doi.org/10.5194/ars-19-185-2021, 2021
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We compare winds and tidal amplitudes in the upper mesosphere/lower thermosphere region for cases with disturbed and undisturbed geomagnetic conditions. The zonal winds in both the mesosphere and lower thermosphere tend to be weaker during disturbed conditions. The summer equatorward meridional wind jet is weaker for disturbed geomagnetic conditions. The effect of geomagnetic variability on tidal amplitudes, except for the semidiurnal tide, is relatively small.
Ales Kuchar, Gunter Stober, Dimitry Pokhotelov, Huixin Liu, Han-Li Liu, Manfred Ern, Damian Murphy, Diego Janches, Tracy Moffat-Griffin, Nicholas Mitchell, and Christoph Jacobi
EGUsphere, https://doi.org/10.5194/egusphere-2025-2827, https://doi.org/10.5194/egusphere-2025-2827, 2025
This preprint is open for discussion and under review for Annales Geophysicae (ANGEO).
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We studied how the healing of the Antarctic ozone layer is affecting winds high above the South Pole. Using ground-based radar, satellite data, and computer models, we found that winds in the upper atmosphere have become stronger over the past two decades. These changes appear to be linked to shifts in the lower atmosphere caused by ozone recovery. Our results show that human efforts to repair the ozone layer are also influencing climate patterns far above Earth’s surface.
Arthur Gauthier, Claudia Borries, Alexander Kozlovsky, Diego Janches, Peter Brown, Denis Vida, Christoph Jacobi, Damian Murphy, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Johan Kero, Nicholas Mitchell, Tracy Moffat-Griffin, and Gunter Stober
Ann. Geophys., 43, 427–440, https://doi.org/10.5194/angeo-43-427-2025, https://doi.org/10.5194/angeo-43-427-2025, 2025
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This study focuses on a TIMED Doppler Interferometer (TIDI)–meteor radar (MR) comparison of zonal and meridional winds and their dependence on local time and latitude. The correlation calculation between TIDI wind measurements and MR winds shows good agreement. A TIDI–MR seasonal comparison and analysis of the altitude–latitude dependence for winds are performed. TIDI reproduces the mean circulation well when compared with MRs and may be a useful lower boundary for general circulation models.
Sina Mehrdad, Sajedeh Marjani, Dörthe Handorf, and Christoph Jacobi
EGUsphere, https://doi.org/10.5194/egusphere-2025-3005, https://doi.org/10.5194/egusphere-2025-3005, 2025
This preprint is open for discussion and under review for Weather and Climate Dynamics (WCD).
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Wind flowing over mountains creates wave-like patterns aloft that can influence the atmosphere higher up in the stratosphere and mesosphere. In this study, we intensified these waves over specific regions like the Himalayas and Rocky Mountains and examined the resulting climate effects. We found that this can shift global wind patterns and even impact extreme events near the poles, showing how small regional changes in stratospheric wind patterns can influence the broader climate system.
J. Federico Conte, Jorge L. Chau, Toralf Renkwitz, Ralph Latteck, Masaki Tsutsumi, Christoph Jacobi, Njål Gulbrandsen, and Satonori Nozawa
EGUsphere, https://doi.org/10.5194/egusphere-2025-1996, https://doi.org/10.5194/egusphere-2025-1996, 2025
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Analysis of 10 years of continuous measurements provided MMARIA/SIMONe Norway and MMARIA/SIMONe Germany reveals that the divergent and vortical motions in the mesosphere and lower thermosphere exchange the dominant role depending on the height and the time of the year. At summer mesopause altitudes over middle latitudes, the horizontal divergence and the relative vorticity contribute approximately the same, indicating an energetic balance between mesoscale divergent and vortical motions.
Christoph Jacobi, Khalil Karami, Ales Kuchar, Manfred Ern, Toralf Renkwitz, Ralph Latteck, and Jorge L. Chau
Adv. Radio Sci., 23, 21–31, https://doi.org/10.5194/ars-23-21-2025, https://doi.org/10.5194/ars-23-21-2025, 2025
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Half-hourly mean winds have been obtained using ground-based low-frequency and very high frequency radio observations of the mesopause region at Collm, Germany, since 1984. Long-term changes of wind variances, which are proxies for short-period atmospheric gravity waves, have been analysed. Gravity wave amplitudes increase with time in winter, but mainly decrease in summer. The trends are consistent with mean wind changes according to wave theory.
Sina Mehrdad, Dörthe Handorf, Ines Höschel, Khalil Karami, Johannes Quaas, Sudhakar Dipu, and Christoph Jacobi
Weather Clim. Dynam., 5, 1223–1268, https://doi.org/10.5194/wcd-5-1223-2024, https://doi.org/10.5194/wcd-5-1223-2024, 2024
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This study introduces a novel deep learning (DL) approach to analyze how regional radiative forcing in Europe impacts the Arctic climate. By integrating atmospheric poleward energy transport with DL-based clustering of atmospheric patterns and attributing anomalies to specific clusters, our method reveals crucial, nuanced interactions within the climate system, enhancing our understanding of intricate climate dynamics.
Ales Kuchar, Maurice Öhlert, Roland Eichinger, and Christoph Jacobi
Weather Clim. Dynam., 5, 895–912, https://doi.org/10.5194/wcd-5-895-2024, https://doi.org/10.5194/wcd-5-895-2024, 2024
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Exploring the polar vortex's impact on climate, the study evaluates model simulations against the ERA5 reanalysis data. Revelations about model discrepancies in simulating disruptive stratospheric warmings and vortex behavior highlight the need for refined model simulations of past climate. By enhancing our understanding of these dynamics, the research contributes to more reliable climate projections of the polar vortex with the impact on surface climate.
Gunter Stober, Sharon L. Vadas, Erich Becker, Alan Liu, Alexander Kozlovsky, Diego Janches, Zishun Qiao, Witali Krochin, Guochun Shi, Wen Yi, Jie Zeng, Peter Brown, Denis Vida, Neil Hindley, Christoph Jacobi, Damian Murphy, Ricardo Buriti, Vania Andrioli, Paulo Batista, John Marino, Scott Palo, Denise Thorsen, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Kathrin Baumgarten, Johan Kero, Evgenia Belova, Nicholas Mitchell, Tracy Moffat-Griffin, and Na Li
Atmos. Chem. Phys., 24, 4851–4873, https://doi.org/10.5194/acp-24-4851-2024, https://doi.org/10.5194/acp-24-4851-2024, 2024
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On 15 January 2022, the Hunga Tonga-Hunga Ha‘apai volcano exploded in a vigorous eruption, causing many atmospheric phenomena reaching from the surface up to space. In this study, we investigate how the mesospheric winds were affected by the volcanogenic gravity waves and estimated their propagation direction and speed. The interplay between model and observations permits us to gain new insights into the vertical coupling through atmospheric gravity waves.
Christoph Jacobi, Ales Kuchar, Toralf Renkwitz, and Juliana Jaen
Adv. Radio Sci., 21, 111–121, https://doi.org/10.5194/ars-21-111-2023, https://doi.org/10.5194/ars-21-111-2023, 2023
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Middle atmosphere long-term changes show the signature of climate change. We analyse 43 years of mesopause region horizontal winds obtained at two sites in Germany. We observe mainly positive trends of the zonal prevailing wind throughout the year, while the meridional winds tend to decrease in magnitude in both summer and winter. Furthermore, there is a change in long-term trends around the late 1990s, which is most clearly visible in summer winds.
Juliana Jaen, Toralf Renkwitz, Huixin Liu, Christoph Jacobi, Robin Wing, Aleš Kuchař, Masaki Tsutsumi, Njål Gulbrandsen, and Jorge L. Chau
Atmos. Chem. Phys., 23, 14871–14887, https://doi.org/10.5194/acp-23-14871-2023, https://doi.org/10.5194/acp-23-14871-2023, 2023
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Investigation of winds is important to understand atmospheric dynamics. In the summer mesosphere and lower thermosphere, there are three main wind flows: the mesospheric westward, the mesopause southward (equatorward), and the lower-thermospheric eastward wind. Combining almost 2 decades of measurements from different radars, we study the trend, their interannual oscillations, and the effects of the geomagnetic activity over these wind maxima.
Olivia Linke, Johannes Quaas, Finja Baumer, Sebastian Becker, Jan Chylik, Sandro Dahlke, André Ehrlich, Dörthe Handorf, Christoph Jacobi, Heike Kalesse-Los, Luca Lelli, Sina Mehrdad, Roel A. J. Neggers, Johannes Riebold, Pablo Saavedra Garfias, Niklas Schnierstein, Matthew D. Shupe, Chris Smith, Gunnar Spreen, Baptiste Verneuil, Kameswara S. Vinjamuri, Marco Vountas, and Manfred Wendisch
Atmos. Chem. Phys., 23, 9963–9992, https://doi.org/10.5194/acp-23-9963-2023, https://doi.org/10.5194/acp-23-9963-2023, 2023
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Lapse rate feedback (LRF) is a major driver of the Arctic amplification (AA) of climate change. It arises because the warming is stronger at the surface than aloft. Several processes can affect the LRF in the Arctic, such as the omnipresent temperature inversion. Here, we compare multimodel climate simulations to Arctic-based observations from a large research consortium to broaden our understanding of these processes, find synergy among them, and constrain the Arctic LRF and AA.
Khalil Karami, Rolando Garcia, Christoph Jacobi, Jadwiga H. Richter, and Simone Tilmes
Atmos. Chem. Phys., 23, 3799–3818, https://doi.org/10.5194/acp-23-3799-2023, https://doi.org/10.5194/acp-23-3799-2023, 2023
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Alongside mitigation and adaptation efforts, stratospheric aerosol intervention (SAI) is increasingly considered a third pillar to combat dangerous climate change. We investigate the teleconnection between the quasi-biennial oscillation in the equatorial stratosphere and the Arctic stratospheric polar vortex under a warmer climate and an SAI scenario. We show that the Holton–Tan relationship weakens under both scenarios and discuss the physical mechanisms responsible for such changes.
Christoph Jacobi, Kanykei Kandieva, and Christina Arras
Adv. Radio Sci., 20, 85–92, https://doi.org/10.5194/ars-20-85-2023, https://doi.org/10.5194/ars-20-85-2023, 2023
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Sporadic E (Es) layers are thin regions of accumulated ions in the lower ionosphere. They can be observed by disturbances of GNSS links between low-Earth orbiting satellites and GNSS satellites. Es layers are influenced by neutral atmospheric tides and show the coupling between the neutral atmosphere and the ionosphere. Here we analyse migrating (sun-synchronous) and non-migrating tidal components in Es. The main signatures are migrating Es, but nonmigrating components are found as well.
Gerhard Georg Bruno Schmidtke, Raimund Brunner, and Christoph Jacobi
EGUsphere, https://doi.org/10.5194/egusphere-2023-139, https://doi.org/10.5194/egusphere-2023-139, 2023
Preprint withdrawn
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The instrument records annual changes in Spectral Outgoing Radiation from 200–1100 nm, with 60 photomultiplier tubes simultaneously providing spectrometer and photometer data. Using Total Solar Irradiance data with a stability of 0.01 Wm-2 per year to recalibrate the established instruments, stable data of ~0.1 Wm-2 over a solar cycle period is expected. Determination of the changes in the global green Earth coverage and mapping will also assess the impact of climate engineering actions.
Gunter Stober, Alan Liu, Alexander Kozlovsky, Zishun Qiao, Ales Kuchar, Christoph Jacobi, Chris Meek, Diego Janches, Guiping Liu, Masaki Tsutsumi, Njål Gulbrandsen, Satonori Nozawa, Mark Lester, Evgenia Belova, Johan Kero, and Nicholas Mitchell
Atmos. Meas. Tech., 15, 5769–5792, https://doi.org/10.5194/amt-15-5769-2022, https://doi.org/10.5194/amt-15-5769-2022, 2022
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Precise and accurate measurements of vertical winds at the mesosphere and lower thermosphere are rare. Although meteor radars have been used for decades to observe horizontal winds, their ability to derive reliable vertical wind measurements was always questioned. In this article, we provide mathematical concepts to retrieve mathematically and physically consistent solutions, which are compared to the state-of-the-art non-hydrostatic model UA-ICON.
Ales Kuchar, Petr Sacha, Roland Eichinger, Christoph Jacobi, Petr Pisoft, and Harald Rieder
EGUsphere, https://doi.org/10.5194/egusphere-2022-474, https://doi.org/10.5194/egusphere-2022-474, 2022
Preprint archived
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We focus on the impact of small-scale orographic gravity waves (OGWs) above the Himalayas. The interaction of GWs with the large-scale circulation in the stratosphere is not still well understood and can have implications on climate projections. We use a chemistry-climate model to show that these strong OGW events are associated with anomalously increased upward planetary-scale waves and in turn affect the circumpolar circulation and have the potential to alter ozone variability as well.
Sumanta Sarkhel, Gunter Stober, Jorge L. Chau, Steven M. Smith, Christoph Jacobi, Subarna Mondal, Martin G. Mlynczak, and James M. Russell III
Ann. Geophys., 40, 179–190, https://doi.org/10.5194/angeo-40-179-2022, https://doi.org/10.5194/angeo-40-179-2022, 2022
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A rare gravity wave event was observed on the night of 25 April 2017 over northern Germany. An all-sky airglow imager recorded an upward-propagating wave at different altitudes in mesosphere with a prominent wave front above 91 km and faintly observed below. Based on wind and satellite-borne temperature profiles close to the event location, we have found the presence of a leaky thermal duct layer in 85–91 km. The appearance of this duct layer caused the wave amplitudes to diminish below 91 km.
Juliana Jaen, Toralf Renkwitz, Jorge L. Chau, Maosheng He, Peter Hoffmann, Yosuke Yamazaki, Christoph Jacobi, Masaki Tsutsumi, Vivien Matthias, and Chris Hall
Ann. Geophys., 40, 23–35, https://doi.org/10.5194/angeo-40-23-2022, https://doi.org/10.5194/angeo-40-23-2022, 2022
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To study long-term trends in the mesosphere and lower thermosphere (70–100 km), we established two summer length definitions and analyzed the variability over the years (2004–2020). After the analysis, we found significant trends in the summer beginning of one definition. Furthermore, we were able to extend one of the time series up to 31 years and obtained evidence of non-uniform trends and periodicities similar to those known for the quasi-biennial oscillation and El Niño–Southern Oscillation.
Christoph Jacobi, Friederike Lilienthal, Dmitry Korotyshkin, Evgeny Merzlyakov, and Gunter Stober
Adv. Radio Sci., 19, 185–193, https://doi.org/10.5194/ars-19-185-2021, https://doi.org/10.5194/ars-19-185-2021, 2021
Short summary
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We compare winds and tidal amplitudes in the upper mesosphere/lower thermosphere region for cases with disturbed and undisturbed geomagnetic conditions. The zonal winds in both the mesosphere and lower thermosphere tend to be weaker during disturbed conditions. The summer equatorward meridional wind jet is weaker for disturbed geomagnetic conditions. The effect of geomagnetic variability on tidal amplitudes, except for the semidiurnal tide, is relatively small.
Gunter Stober, Ales Kuchar, Dimitry Pokhotelov, Huixin Liu, Han-Li Liu, Hauke Schmidt, Christoph Jacobi, Kathrin Baumgarten, Peter Brown, Diego Janches, Damian Murphy, Alexander Kozlovsky, Mark Lester, Evgenia Belova, Johan Kero, and Nicholas Mitchell
Atmos. Chem. Phys., 21, 13855–13902, https://doi.org/10.5194/acp-21-13855-2021, https://doi.org/10.5194/acp-21-13855-2021, 2021
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Little is known about the climate change of wind systems in the mesosphere and lower thermosphere at the edge of space at altitudes from 70–110 km. Meteor radars represent a well-accepted remote sensing technique to measure winds at these altitudes. Here we present a state-of-the-art climatological interhemispheric comparison using continuous and long-lasting observations from worldwide distributed meteor radars from the Arctic to the Antarctic and sophisticated general circulation models.
Rajesh Vaishnav, Christoph Jacobi, Jens Berdermann, Mihail Codrescu, and Erik Schmölter
Ann. Geophys., 39, 641–655, https://doi.org/10.5194/angeo-39-641-2021, https://doi.org/10.5194/angeo-39-641-2021, 2021
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We investigate the role of eddy diffusion in the delayed ionospheric response against solar flux changes in the solar rotation period using the CTIPe model. The study confirms that eddy diffusion is an important factor affecting the delay of the total electron content. An increase in eddy diffusion leads to faster transport processes and an increased loss rate, resulting in a decrease in the ionospheric delay.
Rajesh Vaishnav, Erik Schmölter, Christoph Jacobi, Jens Berdermann, and Mihail Codrescu
Ann. Geophys., 39, 341–355, https://doi.org/10.5194/angeo-39-341-2021, https://doi.org/10.5194/angeo-39-341-2021, 2021
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We investigate the delayed ionospheric response using the observed and CTIPe-model-simulated TEC against the solar EUV flux. The ionospheric delay estimated using model-simulated TEC is in good agreement with the delay estimated for observed TEC. The study confirms the model's capabilities to reproduce the delayed ionospheric response against the solar EUV flux. Results also indicate that the average delay is higher in the Northern Hemisphere as compared to the Southern Hemisphere.
Harikrishnan Charuvil Asokan, Jorge L. Chau, Raffaele Marino, Juha Vierinen, Fabio Vargas, Juan Miguel Urco, Matthias Clahsen, and Christoph Jacobi
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-974, https://doi.org/10.5194/acp-2020-974, 2020
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This paper explores the dynamics of gravity waves and turbulence present in the mesosphere and lower thermosphere (MLT) region. We utilized two different techniques on meteor radar observations and simulations to obtain power spectra at different horizontal scales. The techniques are applied to a special campaign conducted in northern Germany in November 2018. The study revealed the dominance of large-scale structures with horizontal scales larger than 500 km during the campaign period.
Ales Kuchar, Petr Sacha, Roland Eichinger, Christoph Jacobi, Petr Pisoft, and Harald E. Rieder
Weather Clim. Dynam., 1, 481–495, https://doi.org/10.5194/wcd-1-481-2020, https://doi.org/10.5194/wcd-1-481-2020, 2020
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Our study focuses on the impact of topographic structures such as the Himalayas and Rocky Mountains, so-called orographic gravity-wave hotspots. These hotspots play an important role in the dynamics of the middle atmosphere, in particular in the lower stratosphere. We study intermittency and zonally asymmetric character of these hotspots and their effects on the upper stratosphere and mesosphere using a new detection method in various modeling and observational datasets.
Cited articles
Akmaev, R.: Seasonal variations of the terdiurnal tide in the mesosphere and
lower thermosphere: a model study, Geophys. Res. Lett., 28, 3817–3820,
https://doi.org/10.1029/2001GL013002, 2001. a, b, c, d
Baumgarten, K., Gerding, M., Baumgarten, G., and Lübken, F.-J.: Temporal variability of tidal and gravity waves during a record long 10-day continuous lidar sounding, Atmos. Chem. Phys., 18, 371–384, https://doi.org/10.5194/acp-18-371-2018, 2018. a
Beldon, C., Muller, H., and Mitchell, N.: The 8-hour tide in the mesosphere
and lower thermosphere over the UK, 1988–2004, J. Atmos. Sol.-Terr. Phy.,
68, 655–668, https://doi.org/10.1016/j.jastp.2005.10.004, 2006. a
Cevolani, G. and Bonelli, P.: Tidal activity in the middle atmosphere, Nuovo Cimento C, 8, 461–490, https://doi.org/10.1007/BF02582675, 1985. a
Danielson, G. C. and Lanczos, C.: Some improvements in practical Fourier
analysis and their application to x-ray scattering from liquids, J. Frankl. Inst., 233, 365–380, https://doi.org/10.1016/S0016-0032(42)90767-1, 1942. a
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi,
S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P.,
Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C.,
Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B.,
Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M.,
Matricardi, M., McNally, A. P., Monge-Sanz, B. M., Morcrette, J.-J., Park,
B.-K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J.-N., and
Vitart, F.: The ERA-Interim reanalysis: configuration and performance of the
data assimilation system, Q. J. Roy. Meteor. Soc., 137, 553–597,
https://doi.org/10.1002/qj.828, 2011. a
Du, J. and Ward, W. E.: Terdiurnal tide in the extended Canadian Middle
Atmospheric Model (CMAM), J. Geophys. Res., 115, D24106,
https://doi.org/10.1029/2010JD014479, 2010. a, b, c
Eckermann, S. D. and Marks, C. J.: An idealized ray model of gravity
wave-tidal interactions, J. Geophys. Res.-Atmos., 101, 21195–21212,
https://doi.org/10.1029/96JD01660, 1996. a
Eckermann, S. D., Rajopadhyaya, D. K., and Vincent, R. A.: Intraseasonal wind
variability in the equatorial mesosphere and lower thermosphere: long-term
observations from the central Pacific, J. Atmos. Sol.-Terr. Phy., 59,
603–627, https://doi.org/10.1016/S1364-6826(96)00143-5, 1997. a
ERA-Interim: Monthly mean temperature and geopotential fields on pressure
levels 1979-date; Eurpoean Reanalysis Interim, available at:
http://apps.ecmwf.int/datasets/data/interim-full-moda/levtype=pl, last access: 13 August 2018. a
Forbes, J. M.: Tidal and Planetary Waves, 67–87, American Geophysical
Union (AGU), https://doi.org/10.1029/GM087p0067, 1995. a
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. a
Fröhlich, K., Pogoreltsev, A., and Jacobi, C.: Numerical simulation of
tides, Rossby and Kelvin waves with the COMMA-LIM model, Adv. Space Res.,
32, 863–868, https://doi.org/10.1016/S0273-1177(03)00416-2, 2003. a
Guharay, A., Batista, P. P., Clemesha, B. R., Sarkhel, S., and Buriti, R. A.:
On the variability of the terdiurnal tide over a Brazilian equatorial
station using meteor radar observations, J. Atmos. Sol.-Terr. Phy., 104,
87–95, https://doi.org/10.1016/j.jastp.2013.08.021, 2013. a
Hoffmann, P., Jacobi, C., and Borries, C.: Possible planetary wave coupling
between the stratosphere and ionosphere by gravity wave modulation, J.
Atmos. Sol.-Terr. Phy., 75–76, 71–80, https://doi.org/10.1016/j.jastp.2011.07.008,
2012. a
Holton, J. R.: The Role of Gravity Wave Induced Drag and Diffusion in the
Momentum Budget of the Mesosphere, J. Atmos. Sci., 39, 791–799,
https://doi.org/10.1175/1520-0469(1982)039<0791:TROGWI>2.0.CO;2, 1982. a
Huang, C., Zhang, S., and Yi, F.: A numerical study on amplitude
characteristics of the terdiurnal tide excited by nonlinear interaction
between the diurnal and semidiurnal tides, Earth Planets Space, 59,
183–191, https://doi.org/10.1186/BF03353094, 2007. a, b, c, d
Jacobi, C.: 6 year mean prevailing winds and tides measured by VHF meteor
radar over Collm (51.3∘ N, 13.0∘ E), J. Atmos. Sol.-Terr. Phy., 78–79,
8–18, https://doi.org/10.1016/j.jastp.2011.04.010, 2012. a, b
Jacobi, Ch. and Fytterer, T.: The 8-h tide in the mesosphere and lower thermosphere over Collm (51.3∘ N; 13.0∘ E), 2004–2011, Adv. Radio Sci., 10, 265–270, https://doi.org/10.5194/ars-10-265-2012, 2012. a
Jacobi, C., Fröhlich, K., and Pogoreltsev, A.: Quasi two-day-wave
modulation of gravity wave flux and consequences for the planetary wave
propagation in a simple circulation model, J. Atmos. Sol.-Terr. Phy., 68,
283–292, https://doi.org/10.1016/j.jastp.2005.01.017, 2006. a
Jakobs, H. J., Bischof, M., Ebel, A., and Speth, P.: Simulation of gravity
wave effects under solstice conditions using a 3-D circulation model of the
middle atmosphere, J. Atmos. Sol.-Terr. Phy., 48, 1203–1223,
https://doi.org/10.1016/0021-9169(86)90040-1, 1986. a
Lilienthal, F., Jacobi, C., Schmidt, T., de la Torre, A., and Alexander, P.: On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation, Ann. Geophys., 35, 785–798, https://doi.org/10.5194/angeo-35-785-2017, 2017. a, b
Lindzen, R. S.: Turbulence and stress owing to gravity wave and tidal
breakdown, J. Geophys. Res.-Oceans, 86, 9707–9714,
https://doi.org/10.1029/JC086iC10p09707, 1981. a, b
Meyer, C. K.: Gravity wave interactions with mesospheric planetary waves: A
mechanism for penetration into the thermosphere-ionosphere system, J.
Geophys. Res.-Space, 104, 28181–28196, https://doi.org/10.1029/1999JA900346, 1999. a
Miyahara, S. and Forbes, J. M.: Interactions between Gravity Waves and the
Diurnal Tide in the Mesosphere and Lower Thermosphere, J. Meteorol. Soc. Jpn. Ser. II, 69, 523–531, https://doi.org/10.2151/jmsj1965.69.5_523, 1991. a, b, c
Moudden, Y. and Forbes, J. M.: A decade-long climatology of terdiurnal tides
using TIMED/SABER observations, J. Geophys. Res.-Space, 118,
4534–4550, https://doi.org/10.1002/jgra.50273, 2013. a, b
Pancheva, D., Mukhtarov, P., and Smith, A. K.: Climatology of the migrating
terdiurnal tide (TW3) in SABER/ TIMED temperatures, J. Geophys. Res.-Space, 118, 1755–1767, https://doi.org/10.1002/jgra.50207, 2013. a
Pokhotelov, D., Becker, E., Stober, G., and Chau, J. L.: Seasonal variability of atmospheric tides in the mesosphere and lower thermosphere: meteor radar data and simulations, Ann. Geophys., 36, 825–830, https://doi.org/10.5194/angeo-36-825-2018, 2018. a
Reddi, C. R., Rajeev, K., and Geetha, R.: Tidal winds in the
radio-meteor region over Trivandrum (8.5∘ N, 77∘ E), J. Atmos. Terr.
Phys., 55, 1219–1231, https://doi.org/10.1016/0021-9169(93)90049-5, 1993. a
Ribstein, B. and Achatz, U.: The interaction between gravity waves and solar
tides in a linear tidal model with a 4-D ray-tracing gravity-wave
parameterization, J. Geophys. Res.-Space, 121, 8936–8950,
https://doi.org/10.1002/2016JA022478, 2016. a, b
Senf, F. and Achatz, U.: On the impact of middle-atmosphere thermal tides on
the propagation and dissipation of gravity waves, J. Geophys. Res.-Atmos.,
116, D24110, https://doi.org/10.1029/2011JD015794, 2011. a
Smith, A. K.: Structure of the terdiurnal tide at 95 km, Geophys. Res, Lett.,
27, 177–180, https://doi.org/10.1029/1999GL010843, 2000. a
Smith, A. K.: Global Dynamics of the MLT, Surv. Geophys., 33, 1177–1230,
https://doi.org/10.1007/s10712-012-9196-9, 2012. a
Strobel, D. F.: Parameterization of the atmospheric heating rate from 15 to
120 km due to O2 and O3 absorption of solar radiation, J. Geophys. Res.-Oceans, 83, 6225–6230, https://doi.org/10.1029/JC083iC12p06225, 1978. a
Teitelbaum, H. and Vial, F.: On tidal variability induced by nonlinear
interaction with planetary waves, J. Geophys. Res.-Space, 96,
14169–14178, https://doi.org/10.1029/91JA01019, 1991. a
Teitelbaum, H., Vial, F., Manson, A., Giraldez, R., and Massebeuf, M.:
Non-linear interaction between the diurnal and semidiurnal tides: terdiurnal
and diurnal secondary waves, J. Atmos. Terr. Phys., 51, 627–634,
https://doi.org/10.1016/0021-9169(89)90061-5, 1989. a, b, c
Thayaparan, T.: The terdiurnal tide in the mesosphere and lower thermosphere
over London, Canada (43∘ N, 81∘ W), J. Geophys. Res.-Atmos.,
102, 21695–21708, https://doi.org/10.1029/97JD01839, 1997. a, b, c
Yiğit, E. and Medvedev, A. S.: Internal wave coupling processes in
Earthäs atmosphere, Adv. Space Res., 55, 983–1003,
https://doi.org/10.1016/j.asr.2014.11.020, 2015. a
Yiğit, E. and Medvedev, A. S.: Influence of parameterized small-scale
gravity waves on the migrating diurnal tide in Earth's thermosphere, J.
Geophys. Res.-Space, 122, 4846–4864, https://doi.org/10.1002/2017JA024089,
2017.
a, b
Yiğit, E., Aylward, A. D., and Medvedev, A. S.: Parameterization of the
effects of vertically propagating gravity waves for thermosphere general
circulation models: Sensitivity study, J. Geophys. Res., 113, D19106,
https://doi.org/10.1029/2008JD010135, 2008. a, b, c
Yiğit, E., Medvedev, A. S., Aylward, A. D., Hartogh, P., and Harris, M. J.:
Modeling the effects of gravity wave momentum deposition on the general
circulation above the turbopause, J. Geophys. Res.-Atmos., 114, D07101,
https://doi.org/10.1029/2008JD011132, 2009. a
Younger, P. T., Pancheva, D., Middleton, H. R., and Mitchell, N. J.: The
8-hour tide in the Arctic mesosphere and lower thermosphere, J. Geophys.
Res.-Space, 107, 1420, https://doi.org/10.1029/2001JA005086, 2002. a
Yue, J., Xu, J., Chang, L. C., Wu, Q., Liu, H.-L., Lu, X., and Russell, J.:
Global structure and seasonal variability of the migrating terdiurnal tide
in the mesosphere and lower thermosphere, J. Atmos. Sol.-Terr. Phy.,
105–106, 191–198, https://doi.org/10.1016/j.jastp.2013.10.010, 2013. a, b, c
Short summary
We analyzed the forcing mechanisms of the migrating terdiurnal solar tide in the middle atmosphere, focusing the impact on the zonal mean circulation. We show that the primary solar forcing is the most dominant one but secondary wave–wave interactions also contribute in the lower thermosphere region. We further demonstrate that small-scale gravity waves can strongly and irregularly influence the amplitude of the terdiurnal tide as well as the background circulation in the thermosphere.
We analyzed the forcing mechanisms of the migrating terdiurnal solar tide in the middle...
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