基于Aqua卫星AIRS数据的南大洋大气逆温和逆湿特性研究  

Characteristics of the Southern Ocean temperature and specific humidity inversions from the Atmospheric Infrared Sounder(AIRS)on the Aqua satellite

作　　者：许妍 常亮[1] 李黎黎 XU Yan;CHANG Liang;LI Lili(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Huaxiang Technology(Nanjing)Co.,Ltd,Nanjing 210019,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]华象科技(南京)有限公司,江苏南京210019

出　　处：《极地研究》2024年第2期157-168,共12页Chinese Journal of Polar Research

基　　金：国家自然科学基金面上项目(42174016)资助。

摘　　要：南大洋大气普遍存在着逆温和逆湿现象,其分布和变化对海-冰-气之间的物质和通量交换具有重要影响。利用Aqua卫星上搭载的大气红外探测器(AIRS)观测数据,提取了南大洋大气的逆温和逆湿特性,并研究了其时空分布与变化特征。此外,以全球无线电探空数据集的探测结果为参考值,分析了AIRS在进行大气逆温和逆湿探测过程中受到云量影响的特征。结果表明,AIRS估计的逆温特性受云量的影响较小,在多云条件下AIRS也可精确地估计逆温特性。利用AIRS最新的第7版(V7)数据产品对2004-2020年南大洋大气逆温和逆湿的频率(强度)进行研究,发现秋冬季比春夏季高(强),在龙尼冰架、罗斯冰架和南极半岛附近的海域的大气出现逆温和逆湿现象较其他区域更频繁,且强度更强。The temperature inversion(TI)and specific humidity inversion(SHI)are common over the Southern Ocean,and their distribution and variation have important effects on the exchange of matter and flux between ocean,ice and air.In this study,the TI and SHI characteristics of the Southern Ocean were extracted from data obtained by the Atmospheric Infrared Sounder(AIRS)on the Aqua satellite,and the characteristics of their temporal and spatial distributions and variations were studied.In addition,using the sounding results of the Integrated Global Radiosonde Archive 2 as reference values,the effects of cloud in the AIRS TI and SHI estimates were analyzed.The results show that the characteristics of the TI from AIRS data are less affected by clouds,and AIRS can accurately estimate the characteristics of TI under cloudy conditions.The frequency and strength of the TI and SHI over the Southern Ocean from 2004 to 2020 were studied using the latest version of AIRS data(V7).It is found that TI and SHI are higher and stronger in autumn and winter than in spring and summer,and are more frequent and stronger in the Ronne Ice Shelf,Ross Ice Shelf,and the sea area near the Antarctic Peninsula than in other regions.

关 键 词：逆温 逆湿 南大洋 Aqua卫星 AIRS 

分 类 号：P732[天文地球—海洋科学]