两种红外晴空辐射订正方法及其反演大气参数的 - 南京信息工程大学.pdfVIP

31 5 Vo.l 31No. 5 2008 10 JournalofNanjing Institute ofM eteorology Oct. 2008 , HU NG Hung-lung. [ J]. , 2008, 31( 5): 640-645. 1 2 官莉, HU NG Hung-lung ( 1. , 210044; 2. University ofW isconsin, M adisonW I53705) :比较了目前开发的两种红外晴空辐射订正算法: 1)匹配的红外和微波探测值融合的算法, 如 IRS / MSU 晴空订正算法( 气红外探测器 IRS, 先进的微波探测器 MSU); 2)匹配的红外成像 与探测值融合的算法, 如 IRS/MODIS晴空订正算法( 中分辨率光谱成像仪 MODIS)结果表明, 相对于MODIS的晴空观测值而言, IRS /MODIS晴空订正算法优于 IRS/ MSU 晴空订正算法, 而 且 IRS /MODIS晴空订正辐射值反演的 气温湿廓线与欧洲中期天气预报中心( ECMWF)的客观 分析场更接近;尽管这两种晴空订正算法本质上相当不同,但都是有效且互补的, 当微波探测资料 不能获得时,融合红外成像仪和探测器资料就成为唯一可靠的间接使用有云影响的红外观测值的 办法 : IRS/MODIS; IRS / MSU; 晴空订正; 气参数反演 : P412. 27 : : 1000-2022(2008)05-0640-06 Comparison of Two Infrared Cloud-Cleared Approaches and Their Respective Sounding Retrieval Products 1 2 GU N Li, HU NG Hung-lung ( 1. School ofR emote Sensing, NU IST, Nanjing 210044, China; 2. University ofW isconsin, M adisonW I53705, US ) Abstract: It is comparied bewt een wt o infrared cloud-cleared radiance retrievalapproaches, i. e. colloca- ted infrared andm icrowavemeasurement and collocated infrared mi aging and sounding measuremen.t It is found that IRS/MODIS cloud-cleared radiance approach perform better than IRS/ MSU cloud-cleared radiance approach relative to the collocated MODIS clear averaged radiances. The temperature and total precipitablewater retrieved by IRS/MODIS cloud-cleared radiance approach fitwellw ith thatobjective- ly analyzed by ECMWF(European Center ofM edium-rangeW eatherForecasts). Prelmi inary results show that the two approaches, though essentially different, are both effective