TRMM卫星微波成像仪资料的陆面降水反演
RETRIEVAL OF PRECIPITATION OVER LAND USING TRMM MICROWAVE IMAGE
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摘要: 为了探讨微波亮温与降水的关系,用TRMM卫星上微波降水雷达PR、微波辐射计TMI资料和973资料组提供的2002年6～7月120站的每小时自记降水记录,采用逐步回归方法,反演陆面降水。通过资料匹配分析显示,由于时空匹配问题,站点降水与微波辐射计亮温及亮温的组合因子的相关性并不高,明显低于TRMM卫星的测雨雷达PR与微波辐射计亮温及其组合因子的相关程度,因此仅用微波亮温和站点降水难以建立较好的反演算式。结合时空匹配较好的TRMM卫星降水雷达PR、微波辐射计TMI资料,建立新的算式,并且和其它算式进行比较。就反演降水结果而言,新算式比原有算式有一定改善,但对6～10mm/h的降水来说,新算式与原有算式反演结果都较差。Abstract: In this paper,precipitation over land was retrieved using collocated data from a precipitation radar(PR),TMI on the Tropical Rainfall Measuring Mission satellite(TRMM) and the hourly surface rainfall measurements of 120 stations from June to July in 2002 provided by the "973" data group.Through data matching and analysis,It is shown that the hourly rainfall from the stations do not correlate well with corresponding brightness temperatures and their combination factors,but are much lower than the correlation of the precipitation radar(PR) with corresponding brightness temperatures and their combination factors,due to the poor match between time and space.So it is hard to establish a retrieval algorithm if only the hourly rainfall from stations and the corresponding brightness temperatures are used.A new statistical algorithm was built with the precipitation radar data from the PR and the corresponding brightness temperatures data from TMI,and then compared with the old algorithm.As far as the retrieved result of precipitation is concerned,the new retrieval algorithm has certain improvements compared with the original one.But for precipitation of 6～10 mm/h,neither the new retrieval algorithm nor the original retrieval algorithm performs well.
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Key words:
- TRMM satellite /
- data matching /
- retrieval of precipitation /
- algorithms /
- comparison
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[1] ARKIN P A,MEISNER B N.The relationship between large-scale convective rainfall and cold cloud over the western hemisphere during 1982-1984[J].Mon Wea Rev,1987,115(1):51-74. [2] ADLER R F,NEGRI A J.A satellite infrared technique to estimate tropical convective and stratiform rainfall[J].Journal of Applied Meteorology,1988,27(1):30-51. [3] 丁伟钰,林爱兰.GMS5多通道数据与TRMM资料估测华南地区热带气旋降水[J].热带气象学报,2003,19(增):74-81. [4] 魏应植,许健民,周学鸣.台风"杜鹃"的AMSU卫星微波探测资料分析[J].热带气象学报,2005,21(4):359-367. [5] 杜惠良,刘建勇,钮学新.0216号台风(森拉克)路径分析[J].热带气象学报,2004,20(3):281-288. [6] SPENCER R W,HINTON B B,OLSON W S.Nimbus-7 37GHz radiances correlated with radar rain rates over the Gulf of Mexico[J].J Climate Appl Meteor,1983,22(12):2 095-2 099. [7] SPENCER R W,MARTIN D W,HINTON B B,et al.Satellite microwave radiances correlated with radar rain rates over land[J].Nature,1983,304:141-143. [8] FERRARO R R,MARKS G F.The development of SSM/I rain rate retrieval algorithms using ground based radar measurements[J].J Atmospheric and Oceanic Technology,1995,12(8):755-770. [9] GRODY N C.Classification of snow cover and precipitation using the Special Sensor Microwave/Imager(SSM/I)[J].J Geophys Res.1991,96:7 423-7425. [10] ANAGNOSTOU E N,KUMMEROW C.Stratiform and convective classification of rainfall using SSMLI 85 GHz brightness temperature observations[J].J Atmos Oceanic Technol,1997(14):570-575. [11] HONG,Ye,KUMMEROW C D,OLSON W S.Separation of convective and stratiform precipition using microwave brightness temperature[J].Journal of Applied Meteorology,1999,38(8):1 195-1 213. [12] 何文英,陈洪滨,周毓筌,等.微波被动遥感陆面降水统计反演算式的比较[J].遥感技术与应用,2005,20(2):221-227. [13] 李莉,朱元竞,赵柏林,等.卫星微波(SSM/ I)遥感陆地降雨[J].科学通报,1998,43(17):1 877-1 881. [14] 李万彪,陈勇,朱元竞,等.利用热带降雨测量卫星的微波成像仪观测资料反演陆地降水[J].气象学报,2001,59(5):591-600. [15] 陈轶,郑福海,金亚秋.星载微波遥感对中国1998年洪涝的观测统计研究[J].电波科学学报,1999,14(3):241-246. [16] 高文华,赵凤生,盖长松.大气红外探测器(AIRS)温、湿度反演产品的有效性检验及在数值模式中的应用研究[J].气象学报,2006,64(3):271-280. -
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