基于临边大气长波红外辐射信号的平流层增温效应研究  

Study of stratospheric warming effects based on limb atmospheric long-wave infrared radiation signals

作　　者：马骁 戴聪明 赵凤美 饶瑞中 MA Xiao;DAI CongMing;ZHAO FengMei;RAO RuiZhong(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230022,China)

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学重点实验室,合肥230031 [2]中国科学技术大学研究生院科学岛分院,合肥230026 [3]中国科学技术大学环境科学与光电技术学院,合肥230022

出　　处：《地球物理学报》2020年第12期4312-4323,共12页Chinese Journal of Geophysics

基　　金：十三五装备预研共用技术项目(41416020204);中国科学院战略性先导科技专项(A类)(XDA17010104)资助.

摘　　要：本文利用热层-电离层-中间层能量和动力学卫星TIMED中宽带发射辐射计SABER观测的临边大气长波红外背景辐射数据来研究平流层增温效应,基于2012/2013年1—3月在20~100 km高度内的临边大气长波红外背景辐射数据,采用微扰方法,得到辐射扰动的时空分布.结果显示:大气长波红外背景辐射扰动数据能够更精细的展示平流层增温事件的发生,2013年平流层爆发性增温效应下最大辐射扰动幅度出现在40 km处可达160%,而利用温度扰动数据表征此事件的发生时最大温度扰动幅度出现在40 km处只有21%.针对2012年弱平流层增温效应,温度扰动幅度最大值出现在40 km处为16.4%,而辐射扰动幅度的最大值在40 km处可达91%.大气长波红外背景辐射的纬度分布体现出此事件发生于高纬度地区;其经度分布在20~50 km范围内呈现“w”形状;而50 km和80 km处大气长波红外背景辐射的极值区域范围随着事件的发生在高纬度地区都是先扩大随后缩小的过程.这表明高层大气临边红外辐射信号可用于研究平流层增温效应,尤其是对于温度弱起伏的小扰动事件.这对于掌握临近空间环境辐射形成机理及其变化特性亦具有重要意义.In this paper,we used limb atmospheric long-wave infrared background radiation observations from the Sounding of the Atmosphere using Broadband Emission Radiometry(SABER)experiment on the Thermosphere,Ionosphere,Mesosphere Energetics and Dynamics(TIMED)satellite to analyze the stratospheric warming effects.Based on the limb atmospheric long-wave infrared background radiation in the range of 20~100 km between January-March 2012/2013,the spatial and temporal distribution was obtained by perturbation method.The results showed that:atmospheric long-wave infrared background radiation disturbance data more clarity show the occurrence of stratospheric warming events.In 2013,the maximum radiation disturbance amplitude under stratospheric warming at 40 km was 160%,while the maximum temperature disturbance amplitude at 40 km was only 21%.Especially when weak stratospheric warming occurred in 2012,the maximum temperature disturbance amplitude at 40 km was 16.4%,while the maximum radiation disturbance amplitude at 40 km was 91%.The latitude distribution of atmospheric long-wave infrared background radiation showed that the event occurred at high latitudes;It′s longitude distribution presented a“w”shape in the range of 20~50 km;However,the extreme region of atmospheric long-wave infrared background radiation at 50 km and 80 km were the process of expanding and then shrinking with the occurrence of events at high latitudes.These indicate that the infrared radiation signals of the upper atmosphere can be used to study the effect of the stratosphere warming,especially for small disturbance events with weak fluctuations of temperature.It is also of great significance to understand the radiation formation mechanism and its changing characteristics in near space environment.

关 键 词：临近空间 平流层增温 长波红外 辐射 

分 类 号：P405[天文地球—大气科学及气象学]