| 中国近20 a卫星遥感土壤湿度的季节变化及其验证 |
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| 引用本文： | 陈立波,何金海,谭,王国杰.中国近20 a卫星遥感土壤湿度的季节变化及其验证[J].气象科学,2015,35(6):744-750. |
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| 作者姓名： | 陈立波 何金海 谭 王国杰 |
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| 作者单位： | 南京信息工程大学 气象灾害教育部重点实验室, 南京 210044,南京信息工程大学 气象灾害教育部重点实验室, 南京 210044,南京信息工程大学 应用气象学院 生态气象环境中心, 南京 210044,南京信息工程大学 地理与遥感学院 气象灾害预报预警与评估协同创新中心, 南京 210044 |
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| 基金项目： | 国家自然科学基金面上项目(41375099);国家自然科学基金重大研究计划项目(91337108);南京信息工程大学人才启动基金(2241051301004);江苏高校优势学科建设工程资助项目(PAPD);长江学者和创新团队发展计划(PCSIRT) |
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| 摘 要： | 分析了欧洲空间局最近基于多颗卫星微波资料研发的ECV土壤湿度产品的季节性干湿变化,并与国家气象局提供的站点资料做了对比验证。研究发现:主动与被动遥感土壤湿度的干湿季节变化在中国东部季风区有显著的不一致性。在中国东部季风区,被动遥感土壤湿度的干湿季变化和站点观测一致,均表现出夏季是干季、冬季是湿季的特征;而主动遥感的数据则存在较大的空间差异,华北地区与被动遥感数据较为一致,华南地区则呈现夏季为湿季、冬季为干季的反位相特征。两者的不一致性说明,针对欧洲空间局开发ECV土壤湿度产品的过程,融合主动遥感和被动遥感资料,研制长序列土壤湿度产品的思路在中国东部季风区不可行。
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| 关 键 词： | 土壤湿度 卫星遥感 季节变化 比较验证 |
| 收稿时间： | 2014/5/29 0:00:00 |
| 修稿时间： | 2014/10/23 0:00:00 |
Seasonal variation and validation of soil moisture based on recent 20 a satellite-derived data in China |
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| CHEN Libo,HE Jinhai,TAN Yan and WANG Guojie.Seasonal variation and validation of soil moisture based on recent 20 a satellite-derived data in China[J].Scientia Meteorologica Sinica,2015,35(6):744-750. |
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| Authors: | CHEN Libo HE Jinhai TAN Yan and WANG Guojie |
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| Institution: | Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China,Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China,Ecological Environment Center, Institute of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China and Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Geography and Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | The seasonal dry-moist variation of ECV soil moisture product developed by European Space Agency based on the microwave observations of multiple satellites is analyzed, and then the analysis results were compared with the station-based observations from National Meteorological Administration. Results show that the passive and active satellite data provide significantly different seasonal variation of soil moisture. In the summer monsoon region of East China, the passive data are characterized by a dry summer and a wet winter which are consistent with in situ observation. However, the active data has spatial difference of seasonal variation. The seasonal variation of soil moisture from active data is similar to the observations in North China, but it is in the opposite phase in the South China. The inconsistency of seasonal variations between them reveals that it is not a proper way to produce a multi-decadal soil moisture data in the summer monsoon region of East China by combining the passive and active microwave observations. |
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| Keywords: | Soil moisture Remote sensing Seasonal variations Comparison and validation |
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