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《利用MODIS數(shù)據(jù)同時(shí)反演中國(guó)近海海域氣溶膠光學(xué)厚度和Junge譜指數(shù).pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第43卷第1期光子學(xué)報(bào)Vo1.43No.12014年1月ACTAPH0T0NICASINICAJanuary2014doi:10.3788/gzxb20144301.0101003利用MODIS數(shù)據(jù)同時(shí)反演中國(guó)近海海域氣溶膠光學(xué)厚度和Junge譜指數(shù)邊健,曹亞楠,徐夢(mèng)春,徐青山(1中國(guó)科學(xué)院安徽光學(xué)精密機(jī)械研究所,合肥230031)(2中國(guó)科學(xué)院大學(xué),北京100049)(3合肥學(xué)院數(shù)學(xué)與物理系,合肥230601)摘要:基于中分辨率成像光譜輻射儀第15和16兩個(gè)近紅外通道的反射率數(shù)據(jù)和空間幾何角度參量,利用Junge譜近似實(shí)際大氣氣溶膠模型,采用一種物理迭
2、代法,同時(shí)反演了中國(guó)近海海洋上空氣溶膠光學(xué)厚度和Junge譜指數(shù),并對(duì)反演方法進(jìn)行了驗(yàn)證.結(jié)果表明:在所研究的海域上空,大部分氣溶膠的光學(xué)厚度處于0.02~0.17間,Junge譜指數(shù)的范圍集中在2.8~3.8問,且都有從海岸到遠(yuǎn)海遞減的趨勢(shì),得到了合理的氣溶膠Junge譜指數(shù)與氣溶膠光學(xué)厚度的空間分布.將反演結(jié)果與中分辨率成像光譜輻射儀產(chǎn)品和氣溶膠觀測(cè)網(wǎng)數(shù)據(jù)作對(duì)比,發(fā)現(xiàn)反演結(jié)果更加逼近氣溶膠觀測(cè)網(wǎng)數(shù)據(jù)的觀測(cè)值,具有更高的反演準(zhǔn)確度,在該區(qū)域具有較好的適用性,以及一定的可行性與可靠性.關(guān)鍵詞:衛(wèi)星遙感;氣溶膠;反演;光學(xué)厚度;Junge譜;中分辨率成像光
3、譜輻射儀;氣溶膠觀測(cè)網(wǎng)中圖分類號(hào):P402文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1004—4213(2014)01—0101003—8SimultaneousDeterminationofAerosolOpticalThicknessandExponentofJungePowerLawoverEastChinaSeaBasedonMODISDataBIANJian’~,CAOYa—nan~,XUMeng—chun~,XUQing—shan(1AnhuiInstituteofOpticsandFineMechanics,ChineseAcademyofSciences,
4、Hefei230031,China)(2UniversityofChineseAcademyofSciences,Beijing100049,China)(3DepartmentofMathematicsandPhysics,HeUniversity,Hefei230601,China)Abstract:Basedoilthereflectancedataofthefifteenthandsixteenthchannelsinnear-infraredbandsandspatialgeometricalanglesofthemoderateresolut
5、ionimagingspectro-radiometer,aphysicaliterativealgorithmwasproposed,usingtheJungepower-lawsizedistributiontoapproximatetheactualatmosphericaerosolmode1.ThealgorithmwasusedforsimultaneousdeterminationoftheaerosolopticalthicknessandtheexponentoftheJungpower1aw.Theresultsshowthatthe
6、aerosolopticalthicknessovermostofthestudiedoceanisintherangeof0.02-0.17,theexponentoftheJungpowerlawisintherangeof2.8~3.8,andboththeaerosolopticalthicknessandexponentoftheJungpowerlawhavethetrendofdescendingfromcoasttoopensea.Therefore,thereasonablespatialdistributionsoftheexpone
7、ntoftheJungepowerlawandaerosolopticalthicknesswereobtained.Comparingtheretrieva1resultswiththemoderateresolutionimagingspectro—radiometerproductandaerosolroboticnetworkmeasurements,theretrievalalgorithmwhoseresultsaremoreapproachaerosdroboticnetworkdatathanmoderateresolutionimagi
8、ngspectro-radiometerproduct,ismoreaccura