基于SAMPEX卫星观测的南大西洋异常区高能质子动态分布特征

Subjects: Geosciences >> Space Physics submitted time 2016-05-13

吕景天 张效信 林瑞淋 何飞 蒋勇

Abstract： After lots of experiments by using 19~27MeV differential energetic proton data based on the observation of SAMPEX from July of 1992 to June of 2004, it is found that the change of F_(10.7) and altitude have a great influence on the distribution of differential energetic proton flux in South Atlantic Anomaly. During the geomagnetic quiet time at 54025km altitude, the energetic proton flux in South Atlantic Anomaly decreased with the increasing of F_(10.7), and the variation trend was flat when F10.7 ≥ 115 sfu. It is found that there was obviously an anti-correlation between the absolute value of SYM-H and the differential energetic proton flux in South Atlantic Anomaly for storms with SYM-H ? -50, and also there was a lasting effect on differential energetic proton flux in South Atlantic Anomaly. In addition, the proton flux could be significantly reduced in South Atlantic Anomaly during the main phase, while the proton flux showed a substantial resuming trend in the recovery phase of geomagnetic storms.

Peer Review Status:Awaiting Review

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