Response of the High-latitude Upper Mesosphere to Energetic Electron Precipitation

Response of the High-latitude Upper Mesosphere to Energetic Electron Precipitation
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高纬上层中间层对高能电子降水的响应

DOI:
10.3847/1538-4357/ab7eb0
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发表时间:
2020-04
影响因子:
4.9
通讯作者:
Dou Xiankang
Dou Xiankang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zou Zicheng;Xue Xianghui;Yi Wen;Shen Chenglong;Yang Chengyun;Tang Yihuan;Chen Tingdi;Dou Xiankang

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我们对2002 - 2018年强地磁活动对极光区中层顶的影响进行了统计研究。当极光电喷流指数显著增加时,中能质子和电子探测器在55° ~ 70 °地磁纬度带的高能电子沉降增强了几十倍。利用宽带辐射测量仪探测大气温度的结果表明,在中层顶区温度迅速上升,同时中层顶下降了0.5- 2km。由于降水可以影响的深度,我们得出结论,中层顶主要是由电子的能量范围在30-100 keV的影响。95 km处最大温升可达4 K,响应延迟可达1 d。一般来说,我们发现,温度显着响应的电子降水低至93公里,在中层顶区在一年的大部分时间。
We carried out a statistical study on the effects of strong geomagnetic activity on the mesopause over the auroral region from 2002 to 2018. When the auroral electrojet index increased significantly, the energetic electron precipitation from the Medium Energy Proton and Electron Detector was enhanced by several multiples of 10 for the 55°–70° geomagnetic latitude band. The temperatures measured by the Sounding of the Atmosphere using Broadband Emission Radiometry instrument increased immediately in the mesopause region, together with a descent of the mesopause of about 0.5–2 km. Due to the depth that the precipitation can affect, we conclude that the mesopause is mainly influenced by electrons in the energy range 30–100 keV. The maximum temperature increment at 95 km can reach 4 K and the delay of the response can be up to 1 day. In general, we find that the temperatures significantly respond to the electron precipitation at as low as 93 km, within the mesopause region in most of a year.
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发表时间: 2018
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