Determining the Temporal and Spatial Coherence of Plasmaspheric Hiss Waves in the Magnetosphere
Determining the Temporal and Spatial Coherence of Plasmaspheric Hiss Waves in the Magnetosphere
复制标题
确定磁层中等离子体层希斯波的时间和空间相干性
DOI:
10.1029/2020ja028635
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Zhang S
中科院分区:
文献类型:
--
作者:
Zhang S
Plasmaspheric hiss is one of the most important plasma waves in the Earth's magnetosphere to contribute to radiation belt dynamics by pitch‐angle scattering energetic electrons via wave‐particle interactions. There is growing evidence that the temporal and spatial variability of wave‐particle interactions are important factors in the construction of diffusion‐based models of the radiation belts. Hiss amplitudes are thought to be coherent across large distances and on long timescales inside the plasmapause, which means that hiss can act on radiation belt electrons throughout their drift trajectories for many hours. In this study, we investigate both the spatial and temporal coherence of plasmaspheric hiss between the two Van Allen Probes from November 2012 to July 2019. We find ∼3,264 events where we can determine the correlation of wave amplitudes as a function of both spatial distance and time lag in order to study the spatial and temporal coherence of plasmaspheric hiss. The statistical results show that both the spatial and temporal correlation of plasmaspheric hiss decrease with increasingL‐shell, and become incoherent atL> ∼4.5. Inside ofL= ∼4.5, we find that hiss is coherent to within a spatial extent of up to ∼1,500 km and a time lag up to ∼10 min. We find that the spatial and temporal coherence of plasmaspheric hiss does not depend strongly on the geomagnetic index (AL*) or magnetic local time. We discuss the ramifications of our results with relevance to understanding the global characteristics of plasmaspheric hiss waves and their role in radiation belt dynamics.
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影响因子:
5.2
作者:
X. Shen;Wen Li;Q. Ma;O. Agapitov;Y. Nishimura
通讯作者:
X. Shen;Wen Li;Q. Ma;O. Agapitov;Y. Nishimura
影响因子:
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作者:
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DOI:
10.1007/bf00174114
发表时间:
1979
期刊:
Réanimation Urgences
影响因子:
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作者:
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通讯作者:
E. Smith
影响因子:
1.9
作者:
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通讯作者:
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影响因子:
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作者:
B. Delport;A. Collier;J. Lichtenberger;C. Rodger;M. Parrot;M. Clilverd;R. Friedel
通讯作者:
R. Friedel