RETRIEVING REGIONAL SOIL MOISTURE OVER CHINA FROM SSM/I MICROWAVE DATA

Gu Songyan; Zhang Wenjian; Qiu Hong

Vol.15, NO.4, 2004

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2004 > 15(4): 407-416

Gu Songyan, Zhang Wenjian, Qiu Hong. Retrieving regional soil moisture over China from SSM/I microwave data. J Appl Meteor Sci, 2004, 15(4): 407-416.

Citation:

Gu Songyan, Zhang Wenjian, Qiu Hong. Retrieving regional soil moisture over China from SSM/I microwave data. J Appl Meteor Sci, 2004, 15(4): 407-416.

Gu Songyan, Zhang Wenjian, Qiu Hong. Retrieving regional soil moisture over China from SSM/I microwave data. J Appl Meteor Sci, 2004, 15(4): 407-416.

Citation:

Gu Songyan, Zhang Wenjian, Qiu Hong. Retrieving regional soil moisture over China from SSM/I microwave data. J Appl Meteor Sci, 2004, 15(4): 407-416.

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RETRIEVING REGIONAL SOIL MOISTURE OVER CHINA FROM SSM/I MICROWAVE DATA

National Satellite Meteorology Center , Beijing 100081

Received Date: 2003-08-05
Rev Recd Date: 2003-12-11
Publish Date: 2004-08-31

Abstract

Abstract

Remote sensing of soil moisture by microwave radiometry has been a subject of intensive studies in the past two decades. Following the studies done before, a new approach to retrieve surface layer soil moisture is accomplished, in which the passive microwave data from SSM/I, as well as AVHRR and ground observation data are used to retrieve surface microwave emissivity. The retrieved emissivity is further used to derive surface soil moisture. For getting the information about the mixed-pixel, the surface temperature, canopy percentage and surface roughness are involved, and the microwave emissivity of soil element in a pixel can retrieved. The emissivity of soil component in one pixel is better than average emissivity over the whole pixel when retrieval the surface moisture. The physical technique is also retrieved the surface microwave emissivity and surface moisture.
- Passive microwave;
- Surface microwave emissivity;
- Soil moisture;
- Physics retrieval

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References(17)

Figures and Tables

图 1 利用SSM/ I资料反演土壤湿度信息处理流程

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图 2 2002年9月上旬全国AVHRR像元植被覆盖百分率（%）分布图

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图 3 中国及其周边地区地表高程数据分布特征

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图 4 2002年8月19日(a)和8月25(b)两湖流域地表湿反演结果（红色区域为轨道未覆盖区域）

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表 1 SSM/ I仪器性能指标

表 2 SSM/I分类特征量定义

表 3 SSM/ I分类判据

表 4 SSM/ I陆表温度反演方程中的系数

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