Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland
We conducted gravity wave ray-tracing experiments within an atmospheric region centered near the ARCLITE lidar system at Sondrestrom, Greenland (67N, 310 deg E), in efforts to understand lidar observations of both upper stratospheric gravity wave activity and mesospheric clouds during August 1996 an...
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ftdtic:ADA524964 2023-05-15T16:28:03+02:00 Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland Gerrard, Andrew J. Kane, Timothy J. Eckermann, Stephen D. Thayer, Jeffrey P. NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH 2004-05-22 text/html http://www.dtic.mil/docs/citations/ADA524964 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA524964 en eng http://www.dtic.mil/docs/citations/ADA524964 Approved for public release; distribution is unlimited. DTIC Atmospheric Physics Meteorology Optical Detection and Detectors Active & Passive Radar Detection & Equipment Mechanics *GRAVITY WAVES *OPTICAL RADAR *MESOSPHERE CLIMATOLOGY RAY TRACING GREENLAND ATMOSPHERIC MOTION CLOUDS WAVE PROPAGATION LIDAR(LIGHT DETECTION AND RANGING) Text 2004 ftdtic 2016-02-23T02:33:34Z We conducted gravity wave ray-tracing experiments within an atmospheric region centered near the ARCLITE lidar system at Sondrestrom, Greenland (67N, 310 deg E), in efforts to understand lidar observations of both upper stratospheric gravity wave activity and mesospheric clouds during August 1996 and the summer of 2001. The ray model was used to trace gravity waves through realistic three-dimensional daily-varying background atmospheres in the region, based on forecasts and analyses in the troposphere and stratosphere and climatologies higher up. Reverse ray tracing based on upper stratospheric lidar observations at Sondrestrom was also used to try to objectively identify wave source regions in the troposphere. A source spectrum specified by reverse ray tracing experiments in early August 1996 (when atmospheric flow patterns produced enhanced transmission of waves into the upper stratosphere) yielded model results throughout the remainder of August 1996 that agreed best with the lidar observations. The model also simulated increased vertical group propagation of waves between 40 km and 80 km due to intensifying mean easterlies, which allowed many of the gravity waves observed at 40 km over Sondrestrom to propagate quasi-vertically from 40-80 km and then interact with any mesospheric clouds at 80 km near Sondrestrom, supporting earlier experimentally-inferred correlations between upper stratospheric gravity wave activity and mesospheric cloud backscatter from Sondrestrom lidar observations. A pilot experiment of real-time runs with the model in 2001 using weather forecast data as a low-level background produced less agreement with lidar observations. We believe this is due to limitations in our specified tropospheric source spectrum, the use of climatological winds and temperatures in the upper stratosphere and mesosphere, and missing lidar data from important time periods. Published in the Journal of Geophysical Research, v109 nD10103 p1-16, 2004. Text Greenland Defense Technical Information Center: DTIC Technical Reports database Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Atmospheric Physics Meteorology Optical Detection and Detectors Active & Passive Radar Detection & Equipment Mechanics *GRAVITY WAVES *OPTICAL RADAR *MESOSPHERE CLIMATOLOGY RAY TRACING GREENLAND ATMOSPHERIC MOTION CLOUDS WAVE PROPAGATION LIDAR(LIGHT DETECTION AND RANGING) |
spellingShingle |
Atmospheric Physics Meteorology Optical Detection and Detectors Active & Passive Radar Detection & Equipment Mechanics *GRAVITY WAVES *OPTICAL RADAR *MESOSPHERE CLIMATOLOGY RAY TRACING GREENLAND ATMOSPHERIC MOTION CLOUDS WAVE PROPAGATION LIDAR(LIGHT DETECTION AND RANGING) Gerrard, Andrew J. Kane, Timothy J. Eckermann, Stephen D. Thayer, Jeffrey P. Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
topic_facet |
Atmospheric Physics Meteorology Optical Detection and Detectors Active & Passive Radar Detection & Equipment Mechanics *GRAVITY WAVES *OPTICAL RADAR *MESOSPHERE CLIMATOLOGY RAY TRACING GREENLAND ATMOSPHERIC MOTION CLOUDS WAVE PROPAGATION LIDAR(LIGHT DETECTION AND RANGING) |
description |
We conducted gravity wave ray-tracing experiments within an atmospheric region centered near the ARCLITE lidar system at Sondrestrom, Greenland (67N, 310 deg E), in efforts to understand lidar observations of both upper stratospheric gravity wave activity and mesospheric clouds during August 1996 and the summer of 2001. The ray model was used to trace gravity waves through realistic three-dimensional daily-varying background atmospheres in the region, based on forecasts and analyses in the troposphere and stratosphere and climatologies higher up. Reverse ray tracing based on upper stratospheric lidar observations at Sondrestrom was also used to try to objectively identify wave source regions in the troposphere. A source spectrum specified by reverse ray tracing experiments in early August 1996 (when atmospheric flow patterns produced enhanced transmission of waves into the upper stratosphere) yielded model results throughout the remainder of August 1996 that agreed best with the lidar observations. The model also simulated increased vertical group propagation of waves between 40 km and 80 km due to intensifying mean easterlies, which allowed many of the gravity waves observed at 40 km over Sondrestrom to propagate quasi-vertically from 40-80 km and then interact with any mesospheric clouds at 80 km near Sondrestrom, supporting earlier experimentally-inferred correlations between upper stratospheric gravity wave activity and mesospheric cloud backscatter from Sondrestrom lidar observations. A pilot experiment of real-time runs with the model in 2001 using weather forecast data as a low-level background produced less agreement with lidar observations. We believe this is due to limitations in our specified tropospheric source spectrum, the use of climatological winds and temperatures in the upper stratosphere and mesosphere, and missing lidar data from important time periods. Published in the Journal of Geophysical Research, v109 nD10103 p1-16, 2004. |
author2 |
NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH |
format |
Text |
author |
Gerrard, Andrew J. Kane, Timothy J. Eckermann, Stephen D. Thayer, Jeffrey P. |
author_facet |
Gerrard, Andrew J. Kane, Timothy J. Eckermann, Stephen D. Thayer, Jeffrey P. |
author_sort |
Gerrard, Andrew J. |
title |
Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
title_short |
Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
title_full |
Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
title_fullStr |
Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
title_full_unstemmed |
Gravity Waves and Mesospheric Clouds in the Summer Middle Atmosphere: A Comparison of Lidar Measurements and Ray Modeling of Gravity Waves Over Sondrestrom, Greenland |
title_sort |
gravity waves and mesospheric clouds in the summer middle atmosphere: a comparison of lidar measurements and ray modeling of gravity waves over sondrestrom, greenland |
publishDate |
2004 |
url |
http://www.dtic.mil/docs/citations/ADA524964 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA524964 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA524964 |
op_rights |
Approved for public release; distribution is unlimited. |
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1766017661228023808 |