| IR4通道反照率计算及其在降水过程分析中的应用 |
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| 引用本文： | 王凌霄,王洪庆,王玉,林隐静.IR4通道反照率计算及其在降水过程分析中的应用[J].北京大学学报(自然科学版),2011,47(4):599-606. |
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| 作者姓名： | 王凌霄 王洪庆 王玉 林隐静 |
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| 作者单位： | 北京大学物理学院大气与海洋科学系, 北京100871; |
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| 基金项目： | 国家自然科学基金(40875019)资助 |
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| 摘 要： | 在推导IR4通道反照率反演公式的基础上, 将IR4通道亮温及其反照率计算结果用于北京地区夏季降水过程的个例分析。结果表明: IR4通道反照率在降水形成前会出现明显的先升后降的现象, 对降水的反馈早于红外长波(IR1)和水汽(WV)通道; 在强降水后的弱回波阶段, IR1和WV通道亮温会继续下降, 极值位置延迟于雷达最强回波位置, 而IR4通道亮温和反照率这一阶段的变化趋势与以上2个通道相反。
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| 关 键 词： | 静止气象卫星 IR4通道 反照率 降水 天气雷达 |
| 收稿时间： | 2010-04-17 |
Computation of Channel IR4 Albedo and Its Applications in Precipitation Analysis |
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| WANG Lingxiao,WANG Hongqing,WANG Yu,LIN Yinjing.Computation of Channel IR4 Albedo and Its Applications in Precipitation Analysis[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2011,47(4):599-606. |
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| Authors: | WANG Lingxiao WANG Hongqing WANG Yu LIN Yinjing |
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| Institution: | Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871; |
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| Abstract: | Based on the derivation of the formula of channel IR4 albedo,the data including the brightness temperature and the albedo of channel IR4 was applied to analyze a case of the precipitation in summer in Beijing.The results show that channel IR4 albedo will increase and then decrease significantly before the precipitation is generated.Channel IR4 has an earlier feedback on the precipitation than long-wave infrared(IR1) channel and water vapor(WV) channel.In the weak echo phase after heavy precipitation,the bri... |
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| Keywords: | geostationary meteorological satellite channel IR4 albedo precipitation weather radar |
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