六盘山区晴天条件下空气湿度对温度廓线反演的影响  

Influence of Air Humidity in Clear Days on Temperature Profile Retrieval in Liupanshan Area

作　　者：林彤 舒志亮 孙艳桥[1,2,3] 邓佩云 党张利[1,2,3] 田磊 LIN Tong;SHU Zhiliang;SUN Yanqiao;DENG Peiyun;DANG Zhangli;TIAN Lei(Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions,CMA,Yinchuan750002,China;Ningxia Key Lab of Meteorological Disaster Prevention and Reduction,Yinchuan750002,China;Key Laboratory of Cloud and Fog Physical Environment,CMA,Beijing100081,China)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002 [2]宁夏气象防灾减灾重点实验室,宁夏银川750002 [3]中国气象局云雾物理环境重点开放实验室,北京100081

出　　处：《宁夏工程技术》2022年第3期233-239,共7页Ningxia Engineering Technology

基　　金：宁夏自然科学基金资助项目(2020AAC03469,2021AAC03490);国家自然科学基金资助项目(42075073);宁夏回族自治区重点研发计划(2021BEG03005)。

摘　　要：利用2018年3月至2019年11月宁夏隆德气象站RPG-HATPR0-G4型地基微波辐射计反演得到的温度廓线和甘肃平凉探空站探空温度廓线数据,对不同相对湿度条件下的2种温度资料进行了对比分析。结果表明:在相对湿度小于30%时,微波辐射计反演温度与探空温度线性相关性最好,并且线性系数随着相对湿度的增大而减小;2种温度在山顶上空500~<1 500 m的线性系数波动较大,可能是受到地形抬升的影响;选取平均相对湿度分别为26.6%和52.3%的2个个例进行对比分析,可知低相对湿度下2种温度平均差值为0.7℃,高相对湿度下2种温度平均差值为2.7℃。在使用该微波辐射计反演温度时,需要对湿度的影响进行合理订正,分析结果可以为进一步研究微波辐射计反演温度廓线和地形云提供参考。In this paper, based on the temperature profile retrieved from the RPG-HATPRO-G4 ground-based microwave radiometer at the Longde Meteorological Station in Ningxia and the sounding temperature profile data at the Pingliang Sounding Station in Gansu, from March 2018 to November 2019, a comparative study of the two temperature data under different relative humidity conditions was made. The results show that the linear correlation between the microwave radiometer retrieved temperature and radiosonde temperature is the best when the relative humidity is less than 30%, and the linear coefficient decreases with the increase of relative humidity. The linear coefficients of the two temperatures fluctuate greatly between 500 m and 1 500 m above the top of the mountain, which may be affected by the topographic uplift. Two cases with the average relative humidity of 26.6% and 52.3% were selected for comparative analysis. It was found that the average difference between the two temperatures was 0.7 ℃ under low relative humidity, and 2.7 ℃ under high relative humidity. It is necessary to correct the influence of humidity reasonably if the microwave radiometer is used to retrieve temperature. The results can provide a reference for the further study of microwave radiometer retrieved temperature profiles and topographic clouds.

关 键 词：六盘山区 空气湿度 微波辐射计 温度廓线 

分 类 号：P401[天文地球—大气物理学与大气环境]