Daily and seasonal variations in the linear growth rate of the Rayleigh-Taylor instability in the ionosphere obtained with GAIA

Progress in Earth and Planetary Science

Yasunobu Miyoshi¹  Hitoshi Fujiwara²  Yuichi Otsuka³  Hiroyuki Shinagawa⁴  Tatsuhiro Yokoyama⁴  Hidekatsu Jin⁴ 

[1] Department of Earth and Planetary Sciences, Kyushu University;Faculty of Science and Technology, Seikei University;Institute for Space-Earth Environmental Research, Nagoya University;National Institute of Information and Communications Technology;

关键词: Equatorial plasma bubble;    Occurrence rate;    Daily variation;    Atmosphere-ionosphere coupled model;    Rayleigh-Taylor instability;    Linear growth rate;   

DOI  :  10.1186/s40645-018-0175-8

来源: DOAJ

【 摘 要 】

Abstract The linear growth rates of the Rayleigh-Taylor (R-T) instability in the ionosphere from 2011 to 2013 were obtained with a whole atmosphere-ionosphere coupled model GAIA (ground-to-topside model of atmosphere and ionosphere for aeronomy). The effects of thermospheric dynamics driven by atmospheric waves propagating from below on the R-T growth rate are included in the model by incorporating meteorological reanalysis data in the region below 30 km altitude. The daily maximum R-T growth rates for these periods are compared with the observed occurrence days of the equatorial plasma bubble (EPB) determined by the Equatorial Atmosphere Radar (EAR) and Global Positioning System (GPS) in West Sumatra, Indonesia. We found that a high R-T growth rate tends to correspond to the actual EPB occurrence, suggesting the possibility of predicting EPB occurrences with numerical models.

【 授权许可】

Unknown