太阳活动突发过程对临近空间大气影响的模拟  

Simulation on the Impact of the Sudden Process of Solar Activity on the Near Space Atmosphere

作　　者：柳丹 杨钧烽 胡雄 肖存英 程旋 LIU Dan;YANG Junfeng;HU Xiong;XIAO Cunying;CHENG Xuan(State Key Laboratory of Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190;Key Laboratory of Solar Activity and Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;Department of Astronomy,Beijing Normal University,Beijing 100875)

机构地区：[1]中国科学院国家空间科学中心空间天气学国家重点实验室,北京100190 [2]中国科学院国家空间科学中心太阳活动与空间天气重点实验室,北京100190 [3]中国科学院大学,北京100049 [4]北京师范大学天文系,北京100875

出　　处：《空间科学学报》2023年第1期101-111,共11页Chinese Journal of Space Science

基　　金：中国科学院战略性先导科技专项(A类)(XDA17010301);中国科学院国家空间科学中心“攀登计划”项目共同资助;国家自然科学基金项目(42174192,91952111,11872128)。

摘　　要：空间天气对地球及近地空间具有重要影响,大的空间天气事件对中上层大气动力学和成分具有不同的影响。利用全大气耦合模式WACCM,针对太阳耀斑、太阳质子、地磁暴三类事件,以太阳活动平静期2015年5月10-14日的GEOS-5数据为模式背景场,通过F_(10.7)、离子产生率、Kp及Ap指数设置,分别模拟三类事件对临近空间大气温度、密度和臭氧的影响。结果表明耀斑事件在三类事件中对临近空间大气温度和密度的影响最为显著。平流层大气温度增加是由耀斑辐射增强引起平流层臭氧吸收紫外辐射发生的光化学反应所致,耀斑事件引起平流层和低热层温度增加约为2~3 K,低热层大气相对密度增加在6%以内;太阳质子事件及磁暴事件主要影响低热层,但太阳质子事件和磁暴事件对低热层温度扰动不大于1 K。Space weather has important effects on the Earth and near-Earth space, while large space weather events have different effects on the dynamics and composition of the pelagic atmosphere. The Whole Atmosphere Community Climate Model(WACCM) is used to simulate the effects of three types of events on atmospheric parameters of high altitude atmospheric parameters in the near space, atmospheric temperature, density and ozone through F_(10.7), ion production rate, Kp, and Ap index settings, respectively, for solar flares, solar protons and geomagnetic storms. The results show that flare events have the most significant effect on the temperature and density of the near space atmosphere among the three types of events, and the increase in stratospheric atmospheric temperature is caused by the photochemical reaction caused by stratospheric ozone absorption of ultraviolet radiation caused by the enhancement of radiation during the solar flare event, the increase of temperature in stratosphere and low thermosphere is roughly 2~3 K, and the relative density of the lower thermosphere increases within 6%. Solar proton events and geomagnetic storm events mainly affect the low thermosphere, but solar proton events and magnetic storm events disturb the temperature of the lower thermosphere by no more than 1 K.

关 键 词：太阳活动 临近空间 模拟 响应特征 

分 类 号：P351[天文地球—空间物理学]