A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations
We first study the seasonal and geographical behavior of gravity wave activity in the lower stratosphere over the southernmost Andes mountains and their prolongation in the Antarctic Peninsula by global positioning system (GPS) radio occultation (RO) temperature profiles, obtained between years 2002...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00029229 2023-05-15T13:36:44+02:00 A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations Alexander, P. Luna, D. Llamedo, P. de la Torre, A. 2010-02 electronic https://doi.org/10.5194/angeo-28-587-2010 https://noa.gwlb.de/receive/cop_mods_00029229 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029184/angeo-28-587-2010.pdf https://angeo.copernicus.org/articles/28/587/2010/angeo-28-587-2010.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-28-587-2010 https://noa.gwlb.de/receive/cop_mods_00029229 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029184/angeo-28-587-2010.pdf https://angeo.copernicus.org/articles/28/587/2010/angeo-28-587-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/angeo-28-587-2010 2022-02-08T22:47:49Z We first study the seasonal and geographical behavior of gravity wave activity in the lower stratosphere over the southernmost Andes mountains and their prolongation in the Antarctic Peninsula by global positioning system (GPS) radio occultation (RO) temperature profiles, obtained between years 2002 and 2005 by the CHAllenging Minisatellite Payload (CHAMP) mission. The observed features complement observations in the same zone by other satellite passive remote sensing instruments, which are able to detect different height regions and other spectral intervals of the wave spectrum. Comparisons with previous GPS RO studies in smaller areas than the one covered in our analysis are also established. Significant seasonal variation of wave activity is observed in our work, in agreement with results from other instruments. The locations of significant cases indicate that topography is an important source. Some strong wave activity is also found over open ocean. Critical level filtering is shown to have an attenuation effect, implying that a large fraction of the observed activity can be considered to be an outcome of mountain waves. The studied region has a significant advantage as compared to other regions of our planet: it generates wavefronts nearly aligned with the North-South direction (almost parallel to the mountains), whereby this geometry favors the wave detection by the nearly meridional line of sight characterizing most of the GPS RO observations used. A distribution of the observed gravity waves in terms of amplitudes and wavelengths is also presented. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Niedersächsisches Online-Archiv NOA Antarctic Antarctic Peninsula Patagonia The Antarctic Annales Geophysicae 28 2 587 595 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Alexander, P. Luna, D. Llamedo, P. de la Torre, A. A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
topic_facet |
article Verlagsveröffentlichung |
description |
We first study the seasonal and geographical behavior of gravity wave activity in the lower stratosphere over the southernmost Andes mountains and their prolongation in the Antarctic Peninsula by global positioning system (GPS) radio occultation (RO) temperature profiles, obtained between years 2002 and 2005 by the CHAllenging Minisatellite Payload (CHAMP) mission. The observed features complement observations in the same zone by other satellite passive remote sensing instruments, which are able to detect different height regions and other spectral intervals of the wave spectrum. Comparisons with previous GPS RO studies in smaller areas than the one covered in our analysis are also established. Significant seasonal variation of wave activity is observed in our work, in agreement with results from other instruments. The locations of significant cases indicate that topography is an important source. Some strong wave activity is also found over open ocean. Critical level filtering is shown to have an attenuation effect, implying that a large fraction of the observed activity can be considered to be an outcome of mountain waves. The studied region has a significant advantage as compared to other regions of our planet: it generates wavefronts nearly aligned with the North-South direction (almost parallel to the mountains), whereby this geometry favors the wave detection by the nearly meridional line of sight characterizing most of the GPS RO observations used. A distribution of the observed gravity waves in terms of amplitudes and wavelengths is also presented. |
format |
Article in Journal/Newspaper |
author |
Alexander, P. Luna, D. Llamedo, P. de la Torre, A. |
author_facet |
Alexander, P. Luna, D. Llamedo, P. de la Torre, A. |
author_sort |
Alexander, P. |
title |
A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
title_short |
A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
title_full |
A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
title_fullStr |
A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
title_full_unstemmed |
A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations |
title_sort |
gravity waves study close to the andes mountains in patagonia and antarctica with gps radio occultation observations |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/angeo-28-587-2010 https://noa.gwlb.de/receive/cop_mods_00029229 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029184/angeo-28-587-2010.pdf https://angeo.copernicus.org/articles/28/587/2010/angeo-28-587-2010.pdf |
geographic |
Antarctic Antarctic Peninsula Patagonia The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Patagonia The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-28-587-2010 https://noa.gwlb.de/receive/cop_mods_00029229 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00029184/angeo-28-587-2010.pdf https://angeo.copernicus.org/articles/28/587/2010/angeo-28-587-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-28-587-2010 |
container_title |
Annales Geophysicae |
container_volume |
28 |
container_issue |
2 |
container_start_page |
587 |
op_container_end_page |
595 |
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1766083107362963456 |