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1、維普資訊http://www.cqvip.com中國(guó)農(nóng)業(yè)氣象(ChineseJournalofAgr0mete0r0l0gy)2008,29(2):205—207基于MODIS數(shù)據(jù)的黑龍江省大氣水汽含量反演李秀芬,鄭有飛,于瑛楠,王晨軼。(1.南京信息工程大學(xué)大氣科學(xué)學(xué)院,南京210044;2.黑龍江省氣象科學(xué)研究所;3.南京信息工程大學(xué)環(huán)境科學(xué)與工程學(xué)院)摘要:利用兩通道比值法、三通道比值法和姜立鵬等改進(jìn)的三通道算法,應(yīng)用MODIS影像資料進(jìn)行黑龍江省大氣水汽含量的反演,并結(jié)合探空實(shí)測(cè)數(shù)據(jù)進(jìn)行反演精度驗(yàn)證。結(jié)果表明,兩通道比值法的反
2、演結(jié)果最好,計(jì)算結(jié)果與實(shí)測(cè)數(shù)據(jù)間相關(guān)系數(shù)為0.9664,三通道比值法的反演結(jié)果次之,相關(guān)系數(shù)為0.939,姜立鵬等改進(jìn)的三通道算法的反演結(jié)果最差,相關(guān)系數(shù)僅為0.8385;用兩通道算法反演的大氣水汽含量的時(shí)間變化特征與黑龍江省季節(jié)性氣候變化特征相符,空間變化特征與水體上空水汽總量大于陸地上空水汽總量的實(shí)際情況相一致。由此可見(jiàn),兩通道比值法是適合黑龍江省大氣水汽含量遙感反演的方法。關(guān)鍵詞:MODIS;大氣水汽含量;反演RetrievalofVaporContentofAtmosphereBasedonMODISDatainHeilong
3、jiangProvinceLIXiu.fen一,ZHENGYou.fei,YUYing.nan,WANGChen.yi(1.CollegeofAtmosphereScience,NanjingUniversityofInformationScienceandTechnology,Nanjing210044,China;2.InstituteofMeteorologicalSciencesofHeilongjiangProvince;3.CollegeofEnvironmentalScienceandEngineering,Nanjin
4、gUniversityofInformationScienceandTechnology)Abstract:Byusingthetwo—channelratioarithmetic,thethree—channelratioarithmeticandtheimprovedJiangthree—channelratioarithmetic,thevaporcontentofatmospherewasretrievedbasedonMODISdatainHeilongjiangProvince.Theretrievalprecisionw
5、asvalidatedbyusingsoundingreal—measuredata.Itwasindicatedthattheresultsretrievedbythetwo—channelratioarithmeticwerethebest.Thecorrelationcoefi—cientbetweencalculatedresultsandthereal—timemeasureddatawas0.9664.Theresultsretrievedbythethree—channelratioarithmetictookthese
6、condplace.Therelevantcorrelationcoeficientwas0.939.TheresultsretrievedbyimprovedJiang~arithmeticwastheworst.Therelevantcor—relationcoeficientwas0.8358.Thetimechangecharacteristicofthevaporcontentofatmosphereretrievedbythetwo—channelratioarithmeticac—cordedwiththeseasona
7、lclimatechangecharacteristicinHeilongjiangProvince,whilethespatialchangecharacteristicaccordedwiththeactualcircumstancethatthevaporgrossabovewaterbodywasbiggerthanitaboveland.Consequentlythetwo—channelratioarithmeticwasasuitablere—trievalmethodinHeilongjiangProvince.Key
8、words:MODIS;Vaporcontentofatmosphere;Retrieval大氣中的水汽對(duì)全球氣候變化有著極其重要的影插值擴(kuò)展,才能應(yīng)用到氣候模型中,而“以點(diǎn)代面”又會(huì)響,它不僅是成云致雨的條件,也是聯(lián)接