Statistical Analysis of the Warm Plasma Cloak in the Dayside Magnetosphere: 9 Years of MMS Observations

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-07-03 DOI:10.1029/2025GL116933

Victor Montagud-Camps, Sergio Toledo-Redondo, Jerry Goldstein, Stephen A. Fuselier, Mats André, Inmaculada F. Albert, Aida Castilla, Alfonso Salinas, Jorge Portí, Enrique A. Navarro

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Abstract

The warm plasma cloak (WPC) is a plasma population located in the outer magnetosphere. It is composed primarily of electrons and $H^{+}$ ions with energies of tens to hundreds electronvolts and can contain significant amounts of $O^{+}$ . We conduct a statistical survey of the WPC using 9 years of observations in the dayside magnetosphere from the Magnetospheric Multiscale mission. WPC is found in $51 %$ of the observations and it is 1.6 times more abundant in the dawn than in the dusk sector. $O^{+}$ -rich WPC is detected in $7.5 %$ of the observations, being 3 times more probable in the dawn sector. We find that after a peak of strong geomagnetic activity, it takes approximately 9 hr to detect the WPC in the dayside magnetosphere.

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日侧磁层温暖等离子体斗篷的统计分析：9年MMS观测

暖等离子体斗篷（WPC）是位于外磁层的等离子体群。它主要由电子和能量为几十到几百电子伏特的H +离子组成，并可含有大量的O +$ {\ mathrm {O }}^{+}$ .我们利用磁层多尺度任务对日侧磁层9年的观测数据对WPC进行了统计调查。WPC在51%的观测中被发现，它在黎明的数量是黄昏部分的1.6倍。O + ${\mathrm{O}}^{+}$ -富WPC在7.5% $7.5\%$的观测中被检测到，在黎明部分的可能性是其3倍。我们发现，在强烈的地磁活动高峰之后，在日侧磁层探测WPC大约需要9小时。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.