Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study
On 4 July 2014, during the Deep Propagating Gravity Wave Experiment (DEEPWAVE), strong low-level horizontal winds of up to 35 m s−1 over the Southern Alps, New Zealand, caused the excitation of gravity waves having the largest vertical energy fluxes of the whole campaign (38 W m−2). At the same time...
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ftutahsudc:oai:digitalcommons.usu.edu:ail_pubs-1048 2023-05-15T18:02:16+02:00 Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study Bramberger, Martina Dörnbrack, Andreas Bossert, Katrina Ehard, Benedikt Fritts, David C. Kaifler, Bernd Mallaun, Christian Orr, Andrew Pautet, Pierre-Dominique Rapp, Markus Taylor, Michael J. Vosper, Simon Williams, Bifford P. Witschas, Benjamin American Geophysical Union 2017-11-04T07:00:00Z application/pdf https://digitalcommons.usu.edu/ail_pubs/21 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1048&context=ail_pubs unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/ail_pubs/21 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1048&context=ail_pubs Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. PDM Publications Atmospheric Sciences text 2017 ftutahsudc 2022-03-07T21:40:33Z On 4 July 2014, during the Deep Propagating Gravity Wave Experiment (DEEPWAVE), strong low-level horizontal winds of up to 35 m s−1 over the Southern Alps, New Zealand, caused the excitation of gravity waves having the largest vertical energy fluxes of the whole campaign (38 W m−2). At the same time, large-amplitude mesospheric gravity waves were detected by the Temperature Lidar for Middle Atmospheric Research (TELMA) located at Lauder (45.0°S, 169.7°E), New Zealand. The coincidence of these two events leads to the question of whether the mesospheric gravity waves were generated by the strong tropospheric forcing. To answer this, an extensive data set is analyzed, comprising TELMA, in situ aircraft measurements, radiosondes, wind lidar measurements aboard the DLR Falcon as well as Rayleigh lidar and advanced mesospheric temperature mapper measurements aboard the National Science Foundation/National Center for Atmospheric Research Gulfstream V. These measurements are further complemented by limited area simulations using a numerical weather prediction model. This unique data set confirms that strong tropospheric forcing can cause large-amplitude gravity waves in the mesosphere, and that three essential ingredients are required to achieve this: first, nearly linear propagation across the tropopause; second, leakage through the stratospheric wind minimum; and third, amplification in the polar night jet. Stationary gravity waves were detected in all atmospheric layers up to the mesosphere with horizontal wavelengths between 20 and 100 km. The complete coverage of our data set from troposphere to mesosphere proved to be valuable to identify the processes involved in deep gravity wave propagation. Text polar night Utah State University: DigitalCommons@USU New Zealand |
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Utah State University: DigitalCommons@USU |
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ftutahsudc |
language |
unknown |
topic |
Atmospheric Sciences |
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Atmospheric Sciences Bramberger, Martina Dörnbrack, Andreas Bossert, Katrina Ehard, Benedikt Fritts, David C. Kaifler, Bernd Mallaun, Christian Orr, Andrew Pautet, Pierre-Dominique Rapp, Markus Taylor, Michael J. Vosper, Simon Williams, Bifford P. Witschas, Benjamin Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
topic_facet |
Atmospheric Sciences |
description |
On 4 July 2014, during the Deep Propagating Gravity Wave Experiment (DEEPWAVE), strong low-level horizontal winds of up to 35 m s−1 over the Southern Alps, New Zealand, caused the excitation of gravity waves having the largest vertical energy fluxes of the whole campaign (38 W m−2). At the same time, large-amplitude mesospheric gravity waves were detected by the Temperature Lidar for Middle Atmospheric Research (TELMA) located at Lauder (45.0°S, 169.7°E), New Zealand. The coincidence of these two events leads to the question of whether the mesospheric gravity waves were generated by the strong tropospheric forcing. To answer this, an extensive data set is analyzed, comprising TELMA, in situ aircraft measurements, radiosondes, wind lidar measurements aboard the DLR Falcon as well as Rayleigh lidar and advanced mesospheric temperature mapper measurements aboard the National Science Foundation/National Center for Atmospheric Research Gulfstream V. These measurements are further complemented by limited area simulations using a numerical weather prediction model. This unique data set confirms that strong tropospheric forcing can cause large-amplitude gravity waves in the mesosphere, and that three essential ingredients are required to achieve this: first, nearly linear propagation across the tropopause; second, leakage through the stratospheric wind minimum; and third, amplification in the polar night jet. Stationary gravity waves were detected in all atmospheric layers up to the mesosphere with horizontal wavelengths between 20 and 100 km. The complete coverage of our data set from troposphere to mesosphere proved to be valuable to identify the processes involved in deep gravity wave propagation. |
author2 |
American Geophysical Union |
format |
Text |
author |
Bramberger, Martina Dörnbrack, Andreas Bossert, Katrina Ehard, Benedikt Fritts, David C. Kaifler, Bernd Mallaun, Christian Orr, Andrew Pautet, Pierre-Dominique Rapp, Markus Taylor, Michael J. Vosper, Simon Williams, Bifford P. Witschas, Benjamin |
author_facet |
Bramberger, Martina Dörnbrack, Andreas Bossert, Katrina Ehard, Benedikt Fritts, David C. Kaifler, Bernd Mallaun, Christian Orr, Andrew Pautet, Pierre-Dominique Rapp, Markus Taylor, Michael J. Vosper, Simon Williams, Bifford P. Witschas, Benjamin |
author_sort |
Bramberger, Martina |
title |
Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
title_short |
Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
title_full |
Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
title_fullStr |
Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
title_full_unstemmed |
Does Strong Tropospheric Forcing Cause Large-Amplitude Mesospheric Gravity Waves? A DEEPWAVE Case Study |
title_sort |
does strong tropospheric forcing cause large-amplitude mesospheric gravity waves? a deepwave case study |
publisher |
Hosted by Utah State University Libraries |
publishDate |
2017 |
url |
https://digitalcommons.usu.edu/ail_pubs/21 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1048&context=ail_pubs |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
polar night |
genre_facet |
polar night |
op_source |
Publications |
op_relation |
https://digitalcommons.usu.edu/ail_pubs/21 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1048&context=ail_pubs |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
op_rightsnorm |
PDM |
_version_ |
1766172077280198656 |