GVR机载微波辐射计反演算法适用性分析  

Applicability Analysis of Retrieval Algorithm for GVR Airborne Microwave Radiometer

作　　者：王婉 雷恒池[2] 郭晓军 王兆宇 陈超 王彦 吴彬贵 Wang Wan;Lei Hengchi;Guo Xiaojun;Wang Zhaoyu;Chen Chao;Wang Yan;Wu Binggui(Tianjin Weather Modification Office,Tianjin 300074;Key Laboratory of Cloud-Precipitation Physics and Severe Storms,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029;Tianjin Institute of Meteorological Science,Tianjin 300074)

机构地区：[1]天津市人工影响天气办公室,天津300074 [2]中国科学院大气物理研究所云降水物理与强风暴重点实验室,北京100029 [3]天津市气象科学研究院,天津300074

出　　处：《气象科技》2018年第3期485-489,共5页Meteorological Science and Technology

基　　金：天津市气象局科研课题(201707ybxm07);国家自然科学基金课题(41675046)和(41675018)资助

摘　　要：为研究GVR(G-band water Vapor Radiometer)机载微波辐射计自带反演算法在天津地区的适用性,将2016年北京探空资料分成春夏秋冬,对垂直累积液态水和垂直累积水汽的反演精度进行数值模拟检验。结果表明:垂直累积液态水反演精度随高度变化不明显,春夏秋冬4个季节反演结果相对偏差值范围分别为29%~78%、31%~71%、36%~67%、35%~79%,绝对偏差值范围分别为0.04~0.492 mm、0.075~0.294 mm、0.074~0.315mm、0.116~0.347mm;垂直累积水汽反演精度随高度降低(3000m以上降低更为明显),春、夏、秋、冬4个季节相对偏差3000m以下时分别为2.6%~20.8%、7.9%~19.1%、4.3%~16.5%、3.4%~14.2%,3000m以上时分别为6.4%~89.7%、12.5%~36.9%、13.2%~50%、11.8%~301%。与其他类型机载微波辐射计反演精度及GVR在北极地区地基观测反演精度相比,GVR自带反演算法在天津地区的垂直累积液态水和垂直累积水汽反演精度明显偏低。The retrieval accuracy of G-band Vapor Radiometer（GVR）in Tianjin is examined through numerical simulation by using Beijing radiosonde data,which are divided into four seasons,in order to study the applicability of GVR with its own retrival algorithm in Tianjin.The results show that the accumulated liquid water retrival precision has no significant change with height.The relative deviation ranges of the accumulated liquid water in four seasons are 29%to 78%,31%to 71%,36%to 67%,35%to 79% while the absolute deviation ranges are0.04 to 0.492 mm,0.075 to 0.294 mm,0.074 to 0.315 mm,0.116 to 0.347 mm,respectively.The accumulated water vapor retrival precision decreases significantly in all the seasons,especially under the height of 3 km.The relative deviation range below 3 km of the accumulated water vapor in four seasons are 2.6%to 20.8%,7.9%to19.1%,4.3%to 16.5%,3.4%to 14.2%,while above 3 km are 6.4%to 89.7%,12.5%to 36.9%,13.2%to 50%,11.8%to 301%.Compared with the other types of airborne microwave radiometers and ground GVRs used in the Arctic,the retrieval precision of the accumulated liquid water and water vapor in Tianjin is lower obviously.

关 键 词：机载微波辐射计GVR 反演 垂直累积水汽 液态水 

分 类 号：P407.7[天文地球—大气科学及气象学]