The ionospheric mid-latitude summer nighttime anomaly [presentation]
This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime...
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ftncar:oai:drupal-site.org:conference_453 2023-10-01T03:50:53+02:00 The ionospheric mid-latitude summer nighttime anomaly [presentation] AGU Fall Meeting 2009 Lin, C. (author) Chen, C. (author) Hsu, M. (author) Liu, C. (author) Liu, J. (author) Burns, Alan (author) Wang, Wenbin (author) American Geophysical Union (sponsor) 2009-12-14-2009-12-19 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-302 en eng http://www.agu.org/cgi-bin/wais?oo=SA23C-03 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-302 ark:/85065/d7hx1bq1 Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Text conference material 2009 ftncar 2023-09-04T18:34:30Z This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly shown in the southern hemisphere during December solstice was previously known as the Weddell Sea Anomaly (WSA) occurring around the Antarctica and the nearby Pacific Ocean, while a WSA-like electron density structure also occurs in the northern hemisphere around June solstice. This study demonstrates that the anomalies occurred in both the northern and southern hemispheres share similar character of greater nighttime density. Moreover, the latitude-altitude cross-section plots of the electron density structure show very similar time-varying electron density evolutions of the MSNA. In both hemispheres, the anomalies with similar electron density characteristics and variations caused by the similar mechanism prompts us to name this phenomenon the mid-latitude summer nighttime anomaly. Conference Object Antarc* Antarctica Weddell Sea OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific 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 |
This paper presents monthly variations of the mid-latitude summer nighttime anomaly (MSNA) of the ionosphere for the first time by using global observations of the FORMOSAT-3/COSMIC (F3/C), NASA TIMED-GUVI, ground-based radars and GPS receiver network. The MSNA is characterized by greater nighttime (19:00 LT - 24:00 LT, or period of larger solar zenith angles) ionospheric electron density than that during daytime (08:00 - 18:00 LT, or period of smaller solar zenith angles) at middle latitudes during solstices. The anomaly shown in the southern hemisphere during December solstice was previously known as the Weddell Sea Anomaly (WSA) occurring around the Antarctica and the nearby Pacific Ocean, while a WSA-like electron density structure also occurs in the northern hemisphere around June solstice. This study demonstrates that the anomalies occurred in both the northern and southern hemispheres share similar character of greater nighttime density. Moreover, the latitude-altitude cross-section plots of the electron density structure show very similar time-varying electron density evolutions of the MSNA. In both hemispheres, the anomalies with similar electron density characteristics and variations caused by the similar mechanism prompts us to name this phenomenon the mid-latitude summer nighttime anomaly. |
author2 |
AGU Fall Meeting 2009 Lin, C. (author) Chen, C. (author) Hsu, M. (author) Liu, C. (author) Liu, J. (author) Burns, Alan (author) Wang, Wenbin (author) American Geophysical Union (sponsor) |
format |
Conference Object |
title |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
spellingShingle |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
title_short |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
title_full |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
title_fullStr |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
title_full_unstemmed |
The ionospheric mid-latitude summer nighttime anomaly [presentation] |
title_sort |
ionospheric mid-latitude summer nighttime anomaly [presentation] |
publishDate |
2009 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-302 |
geographic |
Pacific Weddell Weddell Sea |
geographic_facet |
Pacific Weddell Weddell Sea |
genre |
Antarc* Antarctica Weddell Sea |
genre_facet |
Antarc* Antarctica Weddell Sea |
op_relation |
http://www.agu.org/cgi-bin/wais?oo=SA23C-03 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-302 ark:/85065/d7hx1bq1 |
op_rights |
Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
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1778528872143257600 |