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冰川冻土 ›› 2013, Vol. 35 ›› Issue (3): 648-655.doi: 10.7522/j.issn.1000-0240.2013.0074

• 寒区科学与技术 • 上一篇    下一篇

基于HJ-1B数据的积雪制图NDSI阈值分析——以祁连山积雪为例

蒋友严1,2,3,4, 杜文涛4,3, 韩涛2, 黄进5, 郝晓华4, 刘伟刚1   

  1. 1. 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;
    2. 西北区域气候中心, 甘肃 兰州 730020;
    3. 中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000;
    4. 冰冻圈科学国家重点实验室/祁连山冰川与生态环境综合观测研究站, 甘肃 兰州 730000;
    5. 甘肃省气象局减灾处, 甘肃 兰州 730020
  • 收稿日期:2012-10-10 修回日期:2013-01-19 出版日期:2013-07-25 发布日期:2013-07-25
  • 通讯作者: 杜文涛,E-mail:duwentao@lzb.ac.cn E-mail:duwentao@lzb.ac.cn
  • 作者简介:蒋友严(1981- ), 男, 山东临沂人, 2007年在中国科学院寒区旱区环境与工程研究所获硕士学位, 现主要从事遥感监测和分析研究工作. E-mail: jiangyouyan1981@163.com
  • 基金资助:

    国家自然科学基金委基础人才培养基金冰川学冻土学特殊学科点(J1210003/J0109); 国家自然科学基金项目(47011046); 甘肃省自然科学基金项目(3ZS051-A25-010);科技部农业科技成果转化资金项目(2011GB24160005)资助

Analysis on NDSI Threshold in Mapping Snow Cover Based on HJ-1B Data—A Case Study of Snow in the Qilian Mountains

JIANG You-yan1,2,3,4, DU Wen-tao4,3, HAN Tao2, HUANG Jin5, HAO Xiao-hua4, LIU Wei-gang1   

  1. 1. Institute of Arid Meteorology of China Meteorological Administration, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Changing and Reducing Disaster of China Meteorological Administration, Lanzhou Gansu 730020, China;
    2. Northwest Regional Climate Center, Lanzhou Gansu 730020, China;
    3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou Gansu 730000, China;
    4. Qilian Shan Station of Glaciology and Ecologic Environment/State Key Laboratory of Cryospheric Science, Lanzhou Gansu 730000, China;
    5. Meteorology Disaster Reduction Department of Gansu Province, Lanzhou Gansu 730020, China
  • Received:2012-10-10 Revised:2013-01-19 Online:2013-07-25 Published:2013-07-25

摘要:

环境减灾卫星是我国于2008年发射的用于环境与灾害监测预报的小卫星星座, 相对于气象卫星传感器, 其空间分辨率有了较大提高.以祁连山积雪为研究对象, 利用环境减灾卫星HJ-1B星开展积雪提取监测研究, 分别对不同区域、不同高程的积雪区进行积雪提取, 以同时期Landsat ETM+影像中提取的积雪面积为标准, 对环境减灾卫星NDSI阈值的选取进行研究分析, 以确定适合于HJ-1B提取积雪的阈值; 同时利用不同季节的HJ-1B积雪数据进行验证, 用Kappa检验阈值的精度.研究表明:HJ-1B积雪制图的阈值为NDSI≥0.24, b2>0.13, b4 >0.15; 其中, 在海拔3 000~4 000 m区域NDSI阈值大于0.25, 海拔4 001~5 000m区域NDSI阈值大于0.45,海拔5 000 m以上区域NDSI阈值大于0.5; 利用Kappa检验阈值精度, Khat系数均高于90%, 说明该研究确立的HJ-1B数据提取积雪的NDSI阈值合理有效.

关键词: 环境减灾卫星, 积雪, 阈值, Khat系数

Abstract:

The Chinese HJ satellites with smaller constellation, which were launched on September 6, 2008, have been improved on spatial resolution. and they are focus on environmental and disaster monitoring and meteorological forecast. In this paper, snow cover of Qilian mountains is exacted at different regions and altitude by means of HJ-1B, meanwhile the optimal threshold of NDSI using HJ satellite is determined through the snow area derived from Landsat ETM + images at same period. At last, the threshold precision are estimated with Kappa test.

Key words: HJsatellite, snow cover, threshold, Khat coefficient

中图分类号: 

  • P407.8