Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]

The Weddell Sea Anomaly (WSA) in the ionosphere is characterized by higher plasma density at night than during the day in the region near the Weddell Sea. According to previous studies on the WSA, it is known to occur mostly in southern summer and has not been reported in other seasons. We have util...

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Other Authors: AGU Fall Meeting 2008, Jee, G. (author), Burns, Alan (author), Wang, Wenbin (author), American Geophysical Union (sponsor)
Format: Conference Object
Language:English
Published: 2008
Subjects:
Online Access:http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-385
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spelling ftncar:oai:drupal-site.org:conference_52 2023-10-01T04:00:02+02:00 Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster] AGU Fall Meeting 2008 Jee, G. (author) Burns, Alan (author) Wang, Wenbin (author) American Geophysical Union (sponsor) 2008-12-15-2008-12-19 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-385 en eng http://www.agu.org/cgi-bin/wais?mm=SA33A-1619 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-385 ark:/85065/d7pz57v0 Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Text conference material 2008 ftncar 2023-09-04T18:33:42Z The Weddell Sea Anomaly (WSA) in the ionosphere is characterized by higher plasma density at night than during the day in the region near the Weddell Sea. According to previous studies on the WSA, it is known to occur mostly in southern summer and has not been reported in other seasons. We have utilized more than 13-year TOPEX TEC measurements in order to study how the WSA varies with seasons and how it changes with solar activity. The TOPEX TEC data have been extensively utilized for the climatological study of the ionosphere due to its excellent spatial and temporal coverage. We investigate the seasonal and solar activity variations of the WSA using four seasonal cases (Mar. equinox, Jun. solstice, Sep, equinox, and Dec. solstice) and two solar activity conditions (F10.7<120 for solar minimum and F10.7>120 for solar maximum conditions) for geomagnetically quiet periods. Our analysis shows that the WSA occurs only in the southern summer hemisphere for low F10.7, as in previous studies, but the WSA occurs all of seasons except for winter when F10.7 is high: it is most prominent during the December solstice (southern summer) and still strong during both equinoxes. The WSA appears to be an extreme case of global longitudinal variations at mid-and high-latitudes. Conference Object Weddell Sea OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Weddell Weddell Sea
institution Open Polar
collection OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
op_collection_id ftncar
language English
description The Weddell Sea Anomaly (WSA) in the ionosphere is characterized by higher plasma density at night than during the day in the region near the Weddell Sea. According to previous studies on the WSA, it is known to occur mostly in southern summer and has not been reported in other seasons. We have utilized more than 13-year TOPEX TEC measurements in order to study how the WSA varies with seasons and how it changes with solar activity. The TOPEX TEC data have been extensively utilized for the climatological study of the ionosphere due to its excellent spatial and temporal coverage. We investigate the seasonal and solar activity variations of the WSA using four seasonal cases (Mar. equinox, Jun. solstice, Sep, equinox, and Dec. solstice) and two solar activity conditions (F10.7<120 for solar minimum and F10.7>120 for solar maximum conditions) for geomagnetically quiet periods. Our analysis shows that the WSA occurs only in the southern summer hemisphere for low F10.7, as in previous studies, but the WSA occurs all of seasons except for winter when F10.7 is high: it is most prominent during the December solstice (southern summer) and still strong during both equinoxes. The WSA appears to be an extreme case of global longitudinal variations at mid-and high-latitudes.
author2 AGU Fall Meeting 2008
Jee, G. (author)
Burns, Alan (author)
Wang, Wenbin (author)
American Geophysical Union (sponsor)
format Conference Object
title Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
spellingShingle Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
title_short Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
title_full Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
title_fullStr Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
title_full_unstemmed Seasonal and solar activity variations of the Weddell Sea Anomaly observed in the TOPEX TEC measurements [poster]
title_sort seasonal and solar activity variations of the weddell sea anomaly observed in the topex tec measurements [poster]
publishDate 2008
url http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-385
geographic Weddell
Weddell Sea
geographic_facet Weddell
Weddell Sea
genre Weddell Sea
genre_facet Weddell Sea
op_relation http://www.agu.org/cgi-bin/wais?mm=SA33A-1619
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-385
ark:/85065/d7pz57v0
op_rights Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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