基于大气红外探空仪和中分辨率成像光谱仪观测的冰云大气红外辐射特性研究

曹亚楠; 魏合理; 边建

doi:doi:10.3788/aos201434.0901003

光学学报, 2014, 34 (9): 0901003, 网络出版: 2014-08-22

基于大气红外探空仪和中分辨率成像光谱仪观测的冰云大气红外辐射特性研究

Study of Atmospheric Radiative Properties at Infrared Bands under Ice Clouds Based on Atmospheric Infrared Sounder and Moderate Resolution Imaging Spectroradiometer Observation

论文大纲

曹亚楠 ^1,2,*魏合理 ^1,3边建 ⁴

作者单位

¹ 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室, 安徽合肥 230031

² 中国科学院大学, 北京 100049

³ 中国科学技术大学环境光学学院, 安徽合肥 230031

⁴ 合肥学院数学与物理系, 安徽合肥 230031

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摘要

利用中分辨率成像光谱仪(MODIS)二级云产品、大气红外探空仪(AIRS)二级大气产品和AIRS L1B红外高光谱数据，采用通用大气辐射传输(CART)模式,选择9 μm（带宽为1070~1135 cm-1）、11.03 μm(带宽为886~928 cm-1)和12.02 μm(带宽为815~850 cm-1)波段对冰云大气顶的亮温进行了模拟与分析。对反演冰云参数和MODIS云产品下的模拟亮温分别与AIRS观测亮温间关系进行了分析与比较，并对反演冰云参数下的模拟亮温和AIRS观测亮温的亮温差的概率分布进行了研究。结果表明：基于反演的冰云光学厚度和云顶高度的三波段模拟亮温和AIRS实际观测亮温分布一致，模拟计算和AIRS实际观测亮温间相关系数达0.98以上。11.03 μm和12.02 μm波段模拟计算和AIRS实际观测亮温间亮温差主要分布在0~5 K，9 μm波段亮温差主要分布在0~±0.5 K。建立在反演冰云参数基础上的实际大气条件下的大气辐射特性模拟研究具有准确性和可靠性。

Abstract

Combined atmospheric radiative transfer (CART) model based on moderate resolution imaging spectroradiometer (MODIS) level2 cloud products, atmospheric infrared sounder (AIRS) level 2 atmospheric products and AIRS L1B product is used to simulate and analyze brightness temperature at the top of ice clouds atmosphere at 9 μm (band from 1070 cm-1 to 1135 cm-1), 11.03 μm (band from 886 cm-1 to 928 cm-1) and 12.02 μm (band from 815 cm-1 to 850 cm-1) bands. Brightness temperatures between AIRS observation and simulation brightness temperatures with retrieved ice clouds parameters and MODIS cloud product at three bands are compared and analyzed. The probability distribution of brightness temperature difference between simulation with retrieved ice clouds parameters and AIRS observation is studied. Results show that distribution of brightness temperature simulated based on retrieved ice clouds optical thickness and cloud top height is consistent with AIRS observation at three bands. Correlation coefficient of brightness temperature between them is bigger than 0.98.The brightness temperature difference between model simulation and AIRS observation at 11.03 μm and 12.02 μm bands is at the range from 0 to 5 K, and 0 to ±0.5 K at 9 μm band. It is definitely accurate and reliable to simulate atmospheric radiative properties under actual atmospheric conditions with retrieved ice clouds parameters.

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曹亚楠, 魏合理, 边建. 基于大气红外探空仪和中分辨率成像光谱仪观测的冰云大气红外辐射特性研究[J]. 光学学报, 2014, 34(9): 0901003. Cao Yanan, Wei Heli, Bian Jian. Study of Atmospheric Radiative Properties at Infrared Bands under Ice Clouds Based on Atmospheric Infrared Sounder and Moderate Resolution Imaging Spectroradiometer Observation[J]. Acta Optica Sinica, 2014, 34(9): 0901003.

基于大气红外探空仪和中分辨率成像光谱仪观测的冰云大气红外辐射特性研究

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