Quantification of Energetic Electron Precipitation Driven by Plume Whistler Mode Waves, Plasmaspheric Hiss, and Exohiss
Quantification of Energetic Electron Precipitation Driven by Plume Whistler Mode Waves, Plasmaspheric Hiss, and Exohiss
复制标题
DOI：
10.1029/2019gl082095
复制
发表时间：
2019-04
影响因子：
5.2
通讯作者：
W. Li;X. Shen;Q. Ma;L. Capannolo;R. Shi;R. Redmon;J. Rodriguez;G. Reeves;C. Kletzing;W. Kurth;G. Hospodarsky
中科院分区：
文献类型：
--
作者：
W. Li;X. Shen;Q. Ma;L. Capannolo;R. Shi;R. Redmon;J. Rodriguez;G. Reeves;C. Kletzing;W. Kurth;G. Hospodarsky
惠斯勒模式波对于将高能电子沉淀到地球高层大气中是很重要的，而每种惠斯勒模式波对电子沉淀的定量影响还不是很清楚。在这封信中，我们评估了三种类型的哨声模式波驱动的高能电子沉淀：羽流哨声模式波，等离子体层嘶嘶声和等离子体顶外观察到的外嘶嘶声。通过对Van Allen探测器与POES/MetOp卫星的三次交会事件的定量分析，并结合准线性计算，我们发现羽流哨声模式波对俯仰角散射损失最有效，特别是对于几十到几百keV的电子。我们的新发现提供了羽流哨声模式波驱动的有效俯仰角散射的第一个直接证据，对于理解内磁层中高能电子损失过程至关重要。我们建议在未来的辐射带模拟中准确地纳入羽哨模式波的影响。
Whistler mode waves are important for precipitating energetic electrons into Earth's upper atmosphere, while the quantitative effect of each type of whistler mode wave on electron precipitation is not well understood. In this letter, we evaluate energetic electron precipitation driven by three types of whistler mode waves: plume whistler mode waves, plasmaspheric hiss, and exohiss observed outside the plasmapause. By quantitatively analyzing three conjunction events between Van Allen Probes and POES/MetOp satellites, together with quasi‐linear calculation, we found that plume whistler mode waves are most effective in pitch angle scattering loss, particularly for the electrons from tens to hundreds of keV. Our new finding provides the first direct evidence of effective pitch angle scattering driven by plume whistler mode waves and is critical for understanding energetic electron loss process in the inner magnetosphere. We suggest the effect of plume whistler mode waves be accurately incorporated into future radiation belt modeling.