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Responses of Lower Thermospheric Temperature to the 2013 St. Patrick's Day Geomagnetic Storm
Author(s) -
Liu Xiao,
Yue Jia,
Wang Wenbin,
Xu Jiyao,
Zhang Yongliang,
Li Jingyuan,
Russell James M.,
Hervig Mark E.,
Bailey Scott,
Nakamura Takuji
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2018gl078039
Subject(s) - thermosphere , atmospheric sciences , geomagnetic storm , depth sounding , altitude (triangle) , storm , environmental science , latitude , atmosphere (unit) , atmospheric temperature , occultation , ionosphere , radio occultation , earth's magnetic field , climatology , geology , meteorology , physics , geophysics , geodesy , astrophysics , oceanography , geometry , mathematics , quantum mechanics , magnetic field
The altitude‐ and latitude‐dependent responses of neutral temperature in the lower thermosphere to the 2013 St. Patrick's Day geomagnetic storm have been studied using neutral temperature measurements from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument onboard the TIMED satellite and the Solar Occultation For Ice Experiment (SOFIE) instrument onboard the AIM satellite. Both SABER and SOFIE observations revealed that both temperature increase (having peaks of ~15–25 K) and decrease (having peak of ~15 K), which were associated with the storm, occurred in the two hemispheres. The magnitudes of temperature variations changed with latitude, altitude, and the phase of the storm. The peaks of the temperature increase occurred 0.5–1.5 days later than the peak of the AE index, depending on latitude and height. Global circulation changes initiated due to heating and ion drag in the auroral region are likely responsible for the temperature increases or decreases in the lower thermosphere.