| 冻融交替季节黑河上游代表性地物类型的微波辐射时序特征 |
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| 引用本文： | 张立新,赵少杰,蒋玲梅.冻融交替季节黑河上游代表性地物类型的微波辐射时序特征[J].冰川冻土,2009,31(2):198-206. |
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| 作者姓名： | 张立新 赵少杰 蒋玲梅 |
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| 作者单位： | 北京师范大学/中国科学院,遥感应用研究所遥感科学国家重点实验室,北京,100875;北京师范大学,地理学与遥感科学学院,北京,100875;北京师范大学/中国科学院,遥感应用研究所遥感科学国家重点实验室,北京,100875;北京师范大学,地理学与遥感科学学院,北京,100875;北京师范大学/中国科学院,遥感应用研究所遥感科学国家重点实验室,北京,100875;北京师范大学,地理学与遥感科学学院,北京,100875 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，中国科学院西部行动计划(二期)项目，公益性(气象)科研专项基金，高等学校博七学科点专项科研基金 |
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| 摘 要： | 被动微波遥感是监测全球土壤冻融的有利手段,然而由于缺乏实验观测数据,对冻土的微波辐射特征和机理并不是很清楚.2008年3月利用地基微波辐射计(RPG-8CH-DP Radiometer)在黑河流域上游对典型地物18.7 GHz和36.5 GHz的微波辐射进行了连续观测,获取了3种典型土地类型的冻融过程中两个频率双极化的微波辐射特征,计算了土壤冻融过程中发射率和亮温梯度的时序特征并进行了分析.结果表明:土壤冻结会引起土壤发射率的变化,变化的大小主要受土壤表层很薄一层土壤的含水量影响,这是因为这两个波段对土壤的微波穿透深度很小,另外,尽管土壤冻结后亮温梯度会降低,但大多数情况下并没有观测剑冻土负的亮温梯度.
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| 关 键 词： | 被动微波遥感 冻土 亮温梯度 微波辐射汁 黑河流域 |
The Time Series of Microwave Radiation from Representative Land Surfaces in the Upper Reaches of Heihe River during Alternation of Freezing and Thawing |
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| ZHANG Li-xin,ZHAO Shao-jie,JIANG Ling-mei.The Time Series of Microwave Radiation from Representative Land Surfaces in the Upper Reaches of Heihe River during Alternation of Freezing and Thawing[J].Journal of Glaciology and Geocryology,2009,31(2):198-206. |
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| Authors: | ZHANG Li-xin ZHAO Shao-jie JIANG Ling-mei |
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| Institution: | 1.State Key Laboratory of Remote Sensing Science;Beijing Normal University and Institute of Remote Sensing Application ofChinese Academy of Sciences;Beijing 100875;China;2.School of Geography and Remote Sensing Science;Beijing Normal University;China |
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| Abstract: | Passive microwave remote sensing is a useful tool for monitoring the freezing/thawing status of soil.However,the characteristics and principle of soil microwave radiation during freezing/thawing process have not been fully understood owing to lack of experimental data of ground observation.A ground-based microwave radiometer(RPG-8CH-DP Radiometer) with the frequency of 18.7 GHz and 36.5 GHz was set up to observe the microwave radiation of representative land surface in the upper reaches of Heihe River in Ma... |
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| Keywords: | passive microwave remote sensing frozen soil brightness temperature gradient microwave radiometer Heihe watershed |
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