| 三波段地基微波辐射计联合遥感云雨大气参数的方法 |
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| 引用本文： | 魏重.三波段地基微波辐射计联合遥感云雨大气参数的方法[J].大气科学,1995,19(1):21-30. |
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| 作者姓名： | 魏重 |
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| 作者单位： | 中国科学院大气物理研究所,北京 100029 |
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| 基金项目： | 国家自然科学基金支持项目 |
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| 摘 要： | 本文提出了一种用三波段（0.86，1.35，3.2 cm）地基微波辐射计联合反演雨天大气的水汽总量Q，云路径积分液水含量L和雨的垂直路径参数的物理迭代方法。134份样本数值检验结果表明:当雨强小于20 mm／h时，反演的Q，L及雨参数值与模拟真值的相对误差分别在4％，18％，13％以内；当雨强超过20 mm／h时，相对误差分别是25％，57％和3％。文中还特别指出，单独用3.2 cm辐射计测小雨雨强时，相对误差很大，而联合反演能大大提高测雨精度。最后，讨论了该方法的实际应用可能性，表明三波段联合，为全天候监测大气中的水，提供了实际可行的途径。
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| 关 键 词： | 地基微波遥感 水汽 云雨参数 |
Method of Retrieving Cloud and Rain Paramefers in the Atmosphere Using the Measurements of a Triple-Wavelength MW Radiometer |
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| Wei Chong.Method of Retrieving Cloud and Rain Paramefers in the Atmosphere Using the Measurements of a Triple-Wavelength MW Radiometer[J].Chinese Journal of Atmospheric Sciences,1995,19(1):21-30. |
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| Authors: | Wei Chong |
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| Abstract: | A physically-iterative method is proposed to retrieve the atmospheric precipitable water vapor Q,path-integrated cloud liquid water content L and rain parameters along the path using the measurements of triple-wavelength (0.86,l.35 and 3.2 cm)microwave radiometer.A test with 134 independent samples show,that:when rainfall intensity R is less than 20 mm/h,retative errors(RE)in the retrieved Q,L and rain parameters are less there 4%,18% and 13%,respectively;when R is equal to or greater than 20 mm/h,the RE are 25%,57% and 3%,respectively.In addition, it is pointed out that when R is small, the accuracy of retrieved R would be very poor if retrieval is made using 3.2cm wavelength measurements only;while fairly high accuracy can be obtained by the triple-wavelength combined method.Finally,the feasibility of the triple-wavelength combined method is discussed and this work shows that ground-based triple-wavelength MW radiometer is promising for weater proof and continuous monitoring of water in the atmosphere. |
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| Keywords: | ground-based MW radiometer water vapor cloud and rain parameters |
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