| 利用MODIS数据判识祁连山区积雪方法研究 |
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| 引用本文： | 王兴,张强,郭铌,蔡迪花. 利用MODIS数据判识祁连山区积雪方法研究[J]. 干旱气象, 2007, 25(2): 29-34 |
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| 作者姓名： | 王兴 张强 郭铌 蔡迪花 |
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| 作者单位： | 中国气象科学研究院,北京,100081;中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃,兰州,730020;中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃,兰州,730020 |
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| 基金项目： | 西北开发科技行动重大项目 , 中国气象局兰州干旱气象研究所资助项目 |
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| 摘 要： | 对祁连山区积雪、云和各种下垫面进行光谱分析,利用2003年7月至2005年3月的MODIS数据资料,在前人所做研究工作的基础上提出利用归一化差值积雪指数NDSI(Normalized Difference Snow Index)和中分辨率成像光谱仪(Moderate Resolution Imagigng Spectroradiometer)的band 18和band31的结合,采用逐步逼近法去除大部分云、盐湖、冰面、沙漠、戈壁等对积雪判识的干扰,从而判识出祁连山区积雪。由结果分析和检验显示,利用本文方法可以比较有效识别出祁连山区积雪。
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| 关 键 词： | 祁连山 积雪 NDSI 亮温 逐步逼近法 |
| 文章编号： | 1006-7639（2007）-02-0029-06 |
| 修稿时间： | 2007-03-202007-05-14 |
Method for Discriminating Snow in Qilian Mountain Region Based on MODIS Data |
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| WANG Xing,ZHANG Qiang,GUO Ni,CAI Dihua. Method for Discriminating Snow in Qilian Mountain Region Based on MODIS Data[J]. Journal of Arid Meteorology, 2007, 25(2): 29-34 |
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| Authors: | WANG Xing ZHANG Qiang GUO Ni CAI Dihua |
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| Affiliation: | 1. Chinese Academy of Meteorological Sciences, CMA, Beijing 100081, China ; 2. Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of CMA, Lanzhou 730020, China |
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| Abstract: | By analyzing spectrum characteristics of snow,clouds and different land covers in the Qilian Mountain region based on MODIS data from July 2003 to March 2005,a new method for snow discrimination is presented on the basis of former researches,which combined NDSI(Normalized Difference Snow Index) and band 18,band 31 of MODIS to discriminate snow from clouds,saline,ice,desert,etc.with a step-by-step approach.Both result analysis and examination show that snow in the Qilian Mountain region can be effectively discriminated by the method of this article. |
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| Keywords: | the Qilian Mountain snow NDSI brightness temperature step-by-step approach |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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