Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements
In this study, the ionospheric electron density profiles retrieved from radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission are analyzed to determine the F-2 layer maximum electron density (NmF2), peak height (h(m)F(2)), and C...
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ftchinacadscnssc:oai:ir.nssc.ac.cn:122/3209 2023-05-15T18:43:18+02:00 Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements Liu, Libo Le, Huijun Chen, Yiding He, Maosheng Wan, Weixing Yue, Xinan Liu, LB (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China. 2011 http://ir.nssc.ac.cn/handle/122/3209 英语 eng JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Liu, Libo; Le, Huijun; Chen, Yiding; He, Maosheng; Wan, Weixing; Yue, Xinan.Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements,JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116():A09307 http://ir.nssc.ac.cn/handle/122/3209 8 空间物理 期刊论文 2011 ftchinacadscnssc 2019-09-21T06:43:15Z In this study, the ionospheric electron density profiles retrieved from radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission are analyzed to determine the F-2 layer maximum electron density (NmF2), peak height (h(m)F(2)), and Chapman scale height (H-m). During the deep solar minimum of 2008-2009, NmF2, h(m)F(2), and H-m show complicated seasonal variations, which are generally consistent with those in previous solar minima. Besides the equinoctial asymmetry, nonseasonal and semiannual anomalies are present in daytime NmF2; the Weddell Sea anomaly appears in nighttime NmF2 in all seasons except the June solstice. Unusually higher values of h(m)F(2) and H-m appear at southern middle latitudes in the region centered at 70 degrees E in the daytime and h(m)F(2) at 70 degrees W in the nighttime. Wave-like longitudinal patterns are evidently present at low latitudes in all three parameters, showing diurnal and seasonal nature. The values of the parameters under study are smaller in 2008-2009 than the rest of the COSMIC period examined in this study. The seasonal and latitudinal pattern of daytime NmF2 on the solar sensitivity not only confirms our earlier investigation but also explains the observed small NmF2 in 2008-2009 in response to the reduced solar extreme ultraviolet radiance. In this study, the ionospheric electron density profiles retrieved from radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission are analyzed to determine the F-2 layer maximum electron density (NmF2), peak height (h(m)F(2)), and Chapman scale height (H-m). During the deep solar minimum of 2008-2009, NmF2, h(m)F(2), and H-m show complicated seasonal variations, which are generally consistent with those in previous solar minima. Besides the equinoctial asymmetry, nonseasonal and semiannual anomalies are present in daytime NmF2; the Weddell Sea anomaly appears in nighttime NmF2 in all seasons except the June solstice. Unusually higher values of h(m)F(2) and H-m appear at southern middle latitudes in the region centered at 70 degrees E in the daytime and h(m)F(2) at 70 degrees W in the nighttime. Wave-like longitudinal patterns are evidently present at low latitudes in all three parameters, showing diurnal and seasonal nature. The values of the parameters under study are smaller in 2008-2009 than the rest of the COSMIC period examined in this study. The seasonal and latitudinal pattern of daytime NmF2 on the solar sensitivity not only confirms our earlier investigation but also explains the observed small NmF2 in 2008-2009 in response to the reduced solar extreme ultraviolet radiance. Report Weddell Sea National Space Science Center: NSSC OpenIR (Chinese Academy of Sciences) Weddell Weddell Sea |
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Open Polar |
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National Space Science Center: NSSC OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscnssc |
language |
English |
topic |
空间物理 |
spellingShingle |
空间物理 Liu, Libo Le, Huijun Chen, Yiding He, Maosheng Wan, Weixing Yue, Xinan Liu, LB (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China. Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
topic_facet |
空间物理 |
description |
In this study, the ionospheric electron density profiles retrieved from radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission are analyzed to determine the F-2 layer maximum electron density (NmF2), peak height (h(m)F(2)), and Chapman scale height (H-m). During the deep solar minimum of 2008-2009, NmF2, h(m)F(2), and H-m show complicated seasonal variations, which are generally consistent with those in previous solar minima. Besides the equinoctial asymmetry, nonseasonal and semiannual anomalies are present in daytime NmF2; the Weddell Sea anomaly appears in nighttime NmF2 in all seasons except the June solstice. Unusually higher values of h(m)F(2) and H-m appear at southern middle latitudes in the region centered at 70 degrees E in the daytime and h(m)F(2) at 70 degrees W in the nighttime. Wave-like longitudinal patterns are evidently present at low latitudes in all three parameters, showing diurnal and seasonal nature. The values of the parameters under study are smaller in 2008-2009 than the rest of the COSMIC period examined in this study. The seasonal and latitudinal pattern of daytime NmF2 on the solar sensitivity not only confirms our earlier investigation but also explains the observed small NmF2 in 2008-2009 in response to the reduced solar extreme ultraviolet radiance. In this study, the ionospheric electron density profiles retrieved from radio occultation measurements of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission are analyzed to determine the F-2 layer maximum electron density (NmF2), peak height (h(m)F(2)), and Chapman scale height (H-m). During the deep solar minimum of 2008-2009, NmF2, h(m)F(2), and H-m show complicated seasonal variations, which are generally consistent with those in previous solar minima. Besides the equinoctial asymmetry, nonseasonal and semiannual anomalies are present in daytime NmF2; the Weddell Sea anomaly appears in nighttime NmF2 in all seasons except the June solstice. Unusually higher values of h(m)F(2) and H-m appear at southern middle latitudes in the region centered at 70 degrees E in the daytime and h(m)F(2) at 70 degrees W in the nighttime. Wave-like longitudinal patterns are evidently present at low latitudes in all three parameters, showing diurnal and seasonal nature. The values of the parameters under study are smaller in 2008-2009 than the rest of the COSMIC period examined in this study. The seasonal and latitudinal pattern of daytime NmF2 on the solar sensitivity not only confirms our earlier investigation but also explains the observed small NmF2 in 2008-2009 in response to the reduced solar extreme ultraviolet radiance. |
format |
Report |
author |
Liu, Libo Le, Huijun Chen, Yiding He, Maosheng Wan, Weixing Yue, Xinan Liu, LB (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China. |
author_facet |
Liu, Libo Le, Huijun Chen, Yiding He, Maosheng Wan, Weixing Yue, Xinan Liu, LB (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing 100029, Peoples R China. |
author_sort |
Liu, Libo |
title |
Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
title_short |
Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
title_full |
Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
title_fullStr |
Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
title_full_unstemmed |
Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements |
title_sort |
features of the middle- and low-latitude ionosphere during solar minimum as revealed from cosmic radio occultation measurements |
publishDate |
2011 |
url |
http://ir.nssc.ac.cn/handle/122/3209 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS Liu, Libo; Le, Huijun; Chen, Yiding; He, Maosheng; Wan, Weixing; Yue, Xinan.Features of the middle- and low-latitude ionosphere during solar minimum as revealed from COSMIC radio occultation measurements,JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116():A09307 http://ir.nssc.ac.cn/handle/122/3209 |
op_rights |
8 |
_version_ |
1766233634413477888 |