中国区域临近空间准零风层的观测特征  

Analysis of the Observational Characteristics of the Quasi-zero Wind Layer in the Near Space over China

作　　者：胡耀月 王东海 吴珍珍 张春燕 曾智琳 万轶婧 HU Yaoyue;WANG Donghai;WU Zhenzhen;ZHANG Chunyan;ZENG Zhilin;WAN Yijing(School of Atmosphere Sciences,Sun Yat-Sen University,Zhuhai 519082;Meteorological Center of Southwest Air Traffic Management Bureau CAAC,Chengdu 610202;National Observation and Research Station of Coastal Ecological Environments in Macao,Macao Environmental Research Institute,Macao University of Science and Technology,Macao SAR 999078;Southern Marine Sciences and Engineering Guangdong Laboratory,Zhuhai 519082;Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,Zhuhai 519082)

机构地区：[1]中山大学大气科学学院,珠海519082 [2]民航西南空管局气象中心,成都610202 [3]澳门海岸带生态环境国家野外科学观测研究站,澳门科技大学澳门环境研究院,中国澳门999078 [4]南方海洋科学与工程广东省实验室,珠海519082 [5]广东省气候变化与自然灾害研究重点实验室,珠海519082

出　　处：《空间科学学报》2022年第3期383-395,共13页Chinese Journal of Space Science

基　　金：中国科学院战略性先导科技专项(A类)临近空间飞行器运行环境预报技术项目资助(XDA17010402)。

摘　　要：准零风层(Quasi-zero Wind Layer)是指平流层下部风速较小的东西风转换层,是临近空间(20~100 km)开发利用的重要参考依据,也是当前临近空间飞行器浮空运行的研究热点。基于2010-2019年中国多个站点L波段探空资料,将中国分为5个区域(15°N-20°N,20°N-25°N,25°N-30°N,30°N-40°N,40°N-50°N),分析各区域准零风层的结构特点及其随纬度、季节的变化规律。根据实测风场分析发现平流层下部存在单层/双层准零风层,各区域的南北分布差异大致以25°N为界:单层准零风层主要出现在25°N以北的夏季;双层准零风层主要出现在25°N以南的10月至次年5月。单层/双层准零风层平均维持高度随纬度递增,且其厚度以双峰变化为主。此外,单层准零风层每月出现和维持天数均大于双层,30°N以北的单层准零风层在夏季的维持天数较其他区域长。The Quasi-zero Wind Layer is a transition region with low zonal wind speed in the lower stratosphere,which is important reference for the development and utilization of the near space(20~100 km)and has been attracting worldwide interest.In this paper,the whole country(China)is divided into five regions(15°N-20°N,20°N-25°N,25°N-30°N,30°N-40°N,and 40°N-50°N)based on the Lband radar soundings secondly data of stations from January 2010 to December 2019.The structural characteristics of the Quasi-zero Wind Layer in China and its variations with latitude and season are analyzed.The single/double Quasi-zero Wind Layer is defined according to the different observed wind fields from the data.Results show that the overall distribution of the single/double Quasi-zero Wind Layer in the five regions is generally different distinguished from the separating latitude of 25°N:The single Quasi-zero Wind Layer mainly appears in summer to the north of 25°N.The double Quasi-zero Wind Layer mainly appears to the south of 25°N from October to May of the next year.The average maintenance heights of the single/double Quasi-zero Wind Layer increase with the increasing latitude,and its thickness shows mainly bimodal variation.The occurrence and maintenance days of the single Quasi-zero Wind Layer are more than that of the double Quasi-zero Wind Layer,and the maintenance days in the north of 30°N are significantly prolonged.

关 键 词：临近空间 准零风层 L波段探空 纬度变化 月变化 

分 类 号：P356[天文地球—空间物理学]