| 飑线型降水云微波辐射特性的数值研究 |
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| 引用本文： | 林龙福,吕达仁,刘锦丽.飑线型降水云微波辐射特性的数值研究[J].大气科学,1996,20(1):22-27. |
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| 作者姓名： | 林龙福 吕达仁 刘锦丽 |
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| 作者单位： | 1.空军气象学院,南京 211101 |
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| 基金项目： | 国家自然科学基金高技术项目资助 |
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| 摘 要： | 本文将三维云的微物理模式的输出作为三维辐射传输模式的输入，对降水云的微波上行辐射率同地球物理参数间的关系进行了初步研究。在侧边界条件不对称的情况下，如果不考虑实际存在的云间相互辐射作用而模拟降水云的上行辐射率时，模拟出的亮温在低频段将低估卫星上测到的亮温值；在高频段则依降水云上层含冰量的大小而异，即在降水云上层含冰量小的区域，将低估星上测到的亮温，且低估的幅度较低频通道的大，而在降水云上层含冰量大的区域，可能高估星上测到的亮温，但高估的幅度较小。
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| 关 键 词： | 云物理模式 微波辐射传输 亮温 降水云 |
Numerical Study of Microwave Radiative Transfer of Precipitating Squall Line |
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| Lin Longfu,Lu Daren and Liu Jinli.Numerical Study of Microwave Radiative Transfer of Precipitating Squall Line[J].Chinese Journal of Atmospheric Sciences,1996,20(1):22-27. |
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| Authors: | Lin Longfu Lu Daren and Liu Jinli |
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| Abstract: | The relationship between upwelling microwave radiances from precipitating cloud and geophysical parameters was investigated when the output of a 3-D cloud physical model was used as the input of a 3-D radiative transfer model.The preliminary results indicate that if the radiative interactions existing between adjacent clouds are not taken into account in the upwelling radiance modeling,the simulated brightness temperature will underestimate the satellite observed one.The magnitude of underestimation is related to the lower part structure of the cloud for low frequency channels.For high frequency channels,the extent affected varies with the ice content of the upper layer of the cloud.When the ice content is small in the upper layer of the cloud,simulated Tb will underestimate the observed one and the magnitude of underestimation is larger than that for low frequency channels.When the ice content is large enough in the upper layer of the cloud,simulated Tb Will overestimate the observed one,but the magnitude of overestimation is small. |
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| Keywords: | cloud physical model microwave radiative transfer brightness temperature precipitation |
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