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First Global­Scale Synoptic Imaging of Solar Eclipse Effects in the Thermosphere

Cited 5 time in wos
Cited 5 time in scopus
Title
First Global­Scale Synoptic Imaging of Solar Eclipse Effects in the Thermosphere
Other Titles
일식에 의한 열권 변화의 최초 전지구적 시놉틱 이미징
Authors
Aryal, Saurav
Evans, J. S.
Correira, John
Burns, Alan G.
Wang, Wenbin
Solomon, Stanley C.
Laskar, Fazlul I.
McClintock, William E.
Eastes, Richard W.
Dang, Tong
Lei, Jiuhou
Liu, Huixin
Jee, Geonhwa
Subject
Astronomy & Astrophysics
Keywords
IONOSPHEREO/N-2SYSTEMEUV
Issue Date
2020-09
Citation
Aryal, Saurav, et al. 2020. "First Global­Scale Synoptic Imaging of Solar Eclipse Effects in the Thermosphere". JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 125(9): 1-10.
Abstract
A total solar eclipse occurred in the Southern Hemisphere on 2 July 2019 from approximately 17 to 22 UT. Its effect in the thermosphere over South America was imaged from geostationary orbit by NASA's Global-scale Observation of Limb and Disk (GOLD) instrument. GOLD observed a large brightness reduction (>80% around totality) in OI 135.6 nm and N-2 LBH band emissions compared to baseline measurements made 2 days prior. In addition, a significant enhancement (with respect to the baseline) in the Sigma O/N-2 column density ratio (similar to 80%) was observed within the eclipse's totality. This enhancement suggests that the eclipse induced compositional changes in the thermosphere. After the eclipse passed, a slight enhancement in Sigma O/N-2 column density ratio (similar to 7%) was also seen around the totality path when compared to measurements before the eclipse. These observations are the first synoptic imaging measurements of an eclipse's thermospheric effects with the potential to drastically improve and test our understanding of how the thermosphere responds to rapid, localized changes in solar short wavelength radiation.
URI
https://repository.kopri.re.kr/handle/201206/13029
DOI
http://dx.doi.org/10.1029/2020JA027789
Type
Article
Station
기타()
Indexed
SCI
Appears in Collections  
2020-2020, Occurrence of aurora and their correlations with polar upper atmospheric and climate variabilities (20-20) / Jee, Geonhwa (PE20100)
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