基于静止气象卫星观测的降水时间降尺度研究
A Time Downscaling Scheme of Precipitation by Using Geostationary Meteorological Satellite Data
查看参考文献15篇
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文摘
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高分辨率降水时空分布估计对于陆面数值模拟和同化,天气、气候与环境及其相关领域研究具有重要意义.长时间序列降水分布常使用时间和空间插值技术进行估计.本文提出了一种基于每小时静止卫星云图云分类信息的累积降水估计时间加权插值方法,它通过利用高时空分辨率静止卫星云图所反映的云的变化,与卫星降水估计和地面观测降水相结合,以获得时空分布比较合理的地面降水分布.将该方法应用于FY2C云图和国家卫星气象中心FY2C的6小时降水估计业务产品,得到FY2C卫星发射(2005年)以来具有10KM空间分辨率以及1小时分辨率的降水数据集,并利用中国区域自动雨量观测资料对该降水估计数据集进行检验和评估,以表明该方法的合理性. |
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其他语种文摘
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Precipitation estimation with high quality and highresolution in time and space is significant for land model simulation,land data assimilation,and the weather,climate and environment research.To estimate precipitation distribution from rain gauge,the traditional methods interpolate the precipitation in space and time without considering the function of the cloud and discontinuity of precipitation incident in time and space.The paper develops a high-resolution precipitation estimation scheme by using geostationary satellite data,which estimates six-hour resolution precipitation by using multi-channel satellite data and gauge data,and then interpolates the six-hour resolution precipitation into one-hour resolution precipitation by using cloud precipitation probability as weight.The newly developed method is applied to FY2C satellite data and its 6-hour resolution precipitation data to get one-hour resolution precipitation,and is validated again precipitation observation,which shows that the scheme is reasonable. |
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来源
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地理科学进展
,2008,27(4):15-22 【核心库】
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关键词
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降水估计
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时空分布
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静止卫星
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地址
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中国科学院大气物理研究所, 北京, 100029
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-6301 |
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学科
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自然地理学 |
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基金
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中国科学院知识创新工程重要方向项目
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国家863计划
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公益性行业（气象）科研专项
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中国气象局气象新技术推广项目
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文献收藏号
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CSCD:3342565
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