Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41301392 |
| 利用静止卫星反演晴天和云天下行长波辐射的方法研究 | |
| 余珊珊 | |
| 主持机构 | 中国科学院遥感与数字地球研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2016 |
| 资助经费 | 250000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | To obtain contiounus downwelling longwave radiation (DLR) for surface energy research, this study aims to develop an approach for retrieving DLRs from geostationary satellite (Meteosat-9) under all skies. The DLR parameterizations for clear and cloud skies are developed based on extensive radiative transfer simulation, also different atmospheric condition and cloud properties are considered in the simulation. The recent parameterizations always overestimate clear-sky DLRs in daytime over arid regions, and cloudy-sky DLRs when low cloud exists. To overcame these problems, the proposed parameterizations considered the difference between ground and air temperature in clear sky, and longwave radiation above cloud weaken by cloud in cloud sky. Cloud top parameters, the primary factors of cloud, are retrieved with from geostationary satellite, combining look-up table technology and cloud vertical stastical models. Based on the developed DLR algorithm and retrieved cloud parameters, the DLRs under cloudy skies are retrieved with the integration of Meteosat-9 and atmospheric reanalysis data. The DLRs are validated by the field measurements from the sites of Baseline surface radiation network (BSRN) and Atmospheric Radiation Measurement (ARM), and also compared with some longwave radiation datasets. |
| 中文关键词 | 长波辐射 ; 有云天气 ; 静止卫星 ; 参数化模型 ; 热红外 |
| 来源机构 | 中国科学院遥感与数字地球研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346714 |
| 推荐引用方式 GB/T 7714 | 余珊珊.利用静止卫星反演晴天和云天下行长波辐射的方法研究.2014. |
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