光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2015年
5期
1208-1213
,共6页
曹亚楠%魏合理%戴聪明%张学海
曹亞楠%魏閤理%戴聰明%張學海
조아남%위합리%대총명%장학해
卷云%红外高光谱%AIRS%光学厚度%云高%反演
捲雲%紅外高光譜%AIRS%光學厚度%雲高%反縯
권운%홍외고광보%AIRS%광학후도%운고%반연
Cirrus clouds%IR high spectra%AIRS%Optical thickness%Cloud top height%Retrieval
基于大气红外探测器L1B红外高光谱辐射观测资料，结合中分辨率成像光谱仪（moderate resolu-tion imaging spectroradiometer ，MODIS）云产品数据，利用通用大气辐射传输模式（combined atmospheric ra-diative transfer model ，CART ），根据模式模拟和AIRS实际观测亮温的亮温差，研究从AIRS红外波段1070～1135 cm－1高光谱数据反演卷云的光学厚度和云顶高度。将反演的卷云光学厚度与云顶高度作为输入参数模拟计算650～1150 cm－1波段卷云大气顶的辐射亮温谱，并将模拟值与A IRS观测亮温谱进行了对比分析。将反演的卷云光学厚度和云顶高度和AIRS的760通道（900.56 cm －1，11.1μm）的亮温以及MODIS卷云反射率进行了对比分析。最后将反演的卷云云顶高度和 M ODIS云顶高度进行了对比分析。研究结果表明：反演所使用的650～1150 cm－1波段模式模拟和观测亮温谱吻合得很好，说明CART可以较好的模拟A IRS亮温谱。反演的卷云参数与A IRS在大气窗口区的760通道（900.56 cm －1，11.1μm ）的亮温的分布满足低亮温对应较大的卷云光学厚度和高云顶高度。反演的卷云参数和M ODIS卷云的反射率分布满足高卷云光学厚度和云顶高度对应高卷云反射率。反演的卷云云顶高度和M ODIS的卷云云顶高度之间线性相关系数相对较高，且都在8.5～11.5 km的概率较高，两者的概率分布趋势一致。说明CART可以用于反演卷云的性质，反演结果具有一定的可靠性。
基于大氣紅外探測器L1B紅外高光譜輻射觀測資料，結閤中分辨率成像光譜儀（moderate resolu-tion imaging spectroradiometer ，MODIS）雲產品數據，利用通用大氣輻射傳輸模式（combined atmospheric ra-diative transfer model ，CART ），根據模式模擬和AIRS實際觀測亮溫的亮溫差，研究從AIRS紅外波段1070～1135 cm－1高光譜數據反縯捲雲的光學厚度和雲頂高度。將反縯的捲雲光學厚度與雲頂高度作為輸入參數模擬計算650～1150 cm－1波段捲雲大氣頂的輻射亮溫譜，併將模擬值與A IRS觀測亮溫譜進行瞭對比分析。將反縯的捲雲光學厚度和雲頂高度和AIRS的760通道（900.56 cm －1，11.1μm）的亮溫以及MODIS捲雲反射率進行瞭對比分析。最後將反縯的捲雲雲頂高度和 M ODIS雲頂高度進行瞭對比分析。研究結果錶明：反縯所使用的650～1150 cm－1波段模式模擬和觀測亮溫譜吻閤得很好，說明CART可以較好的模擬A IRS亮溫譜。反縯的捲雲參數與A IRS在大氣窗口區的760通道（900.56 cm －1，11.1μm ）的亮溫的分佈滿足低亮溫對應較大的捲雲光學厚度和高雲頂高度。反縯的捲雲參數和M ODIS捲雲的反射率分佈滿足高捲雲光學厚度和雲頂高度對應高捲雲反射率。反縯的捲雲雲頂高度和M ODIS的捲雲雲頂高度之間線性相關繫數相對較高，且都在8.5～11.5 km的概率較高，兩者的概率分佈趨勢一緻。說明CART可以用于反縯捲雲的性質，反縯結果具有一定的可靠性。
기우대기홍외탐측기L1B홍외고광보복사관측자료，결합중분변솔성상광보의（moderate resolu-tion imaging spectroradiometer ，MODIS）운산품수거，이용통용대기복사전수모식（combined atmospheric ra-diative transfer model ，CART ），근거모식모의화AIRS실제관측량온적량온차，연구종AIRS홍외파단1070～1135 cm－1고광보수거반연권운적광학후도화운정고도。장반연적권운광학후도여운정고도작위수입삼수모의계산650～1150 cm－1파단권운대기정적복사량온보，병장모의치여A IRS관측량온보진행료대비분석。장반연적권운광학후도화운정고도화AIRS적760통도（900.56 cm －1，11.1μm）적량온이급MODIS권운반사솔진행료대비분석。최후장반연적권운운정고도화 M ODIS운정고도진행료대비분석。연구결과표명：반연소사용적650～1150 cm－1파단모식모의화관측량온보문합득흔호，설명CART가이교호적모의A IRS량온보。반연적권운삼수여A IRS재대기창구구적760통도（900.56 cm －1，11.1μm ）적량온적분포만족저량온대응교대적권운광학후도화고운정고도。반연적권운삼수화M ODIS권운적반사솔분포만족고권운광학후도화운정고도대응고권운반사솔。반연적권운운정고도화M ODIS적권운운정고도지간선성상관계수상대교고，차도재8.5～11.5 km적개솔교고，량자적개솔분포추세일치。설명CART가이용우반연권운적성질，반연결과구유일정적가고성。
A study was carried out to retrieve optical thickness and cloud top height of cirrus clouds from the Atmospheric Infra-red Sounder (AIRS) high spectral resolution data in 1 070~1 135 cm -1 IR band using a Combined Atmospheric Radiative Trans-fer model (CART) by brightness temperature difference between model simulation and AIRS observation .The research is based on AIRS L1B high spectral infrared observation data combined with Moderate Resolution Imaging Spectroradiometer (MODIS) cloud product data .Brightness temperature spectra based on the retrieved cirrus optical thickness and cloud top height were sim-ulated and compared with brightness temperature spectra of AIRS observation in the 650~1 150 cm-1 band .The cirrus optical thickness and cloud top height retrieved were compared with brightness temperature of AIRS for channel 760 (900.56 cm -1 , 11.1 μm) and cirrus reflectance of MODIS cloud product .And cloud top height retrieved was compared with cloud top height from MODIS .Results show that the brightness temperature spectra simulated were basically consistent with AIRS observation under the condition of retrieval in the 650~1 150 cm -1 band .It means that CART can be used to simulate AIRS brightness tem-perature spectra .The retrieved cirrus parameters are consistent with brightness temperature of AIRS for channel 11.1 μm with low brightness temperature corresponding to large cirrus optical thickness and high cloud top height .And the retrieved cirrus pa-rameters are consistent with cirrus reflectance of MODIS cloud product with high cirrus reflectance corresponding to large cirrus optical thickness and high cloud top height .Correlation coefficient of brightness temperature between retrieved cloud top height and MODIS cloud top height was relatively high .They are mostly located in the range of 8.5~11.5 km ,and their probability distribution trend is approximately identical .CART model is feasible to retrieve cirrus properties ,and the retrieval is reliable .
