| 基于GIS的祁连山植被NDVI对气温降水的旬响应分析 |
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| 引用本文： | 戴声佩,张勃.基于GIS的祁连山植被NDVI对气温降水的旬响应分析[J].生态环境,2010(1):140-145. |
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| 作者姓名： | 戴声佩 张勃 |
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| 作者单位： | 西北师范大学地理与环境科学学院; |
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| 基金项目： | 国家自然科学基金项目(40961038); 中国科学院知识创新工程重要方向项目(KZCX2-YWQ10-4); 公益性行业(气象)科研专项(GYHY200806021-07); 生态经济学省级重点学科(5001-21) |
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| 摘 要： | 利用祁连山地区SPOTVGT-NDVI数据和气象站点旬平均气温、降水资料，运用最大化合成、趋势线分析和相关分析方法分析了祁连山植被的时空变化趋势，并从旬时间尺度上分析了祁连山植被对气温和降水的响应特征。结果表明：近10年来．祁连山年最大化植被NDVI增加了3．1％，植被改善、无变化和退化的面积分别占总面积的70．21％、21．44％和8．35％。祁连山植被NDVI对气温变化的响应大于降水，对气温和降水变化的最大响应滞后都为2句左右。秋季植被NDⅥ对气温和降水变化响应最大，夏季植被NDVI对气温和降水响应的滞后期长于春季和秋季。祁连山植被NDVI对气温和降水变化的旬最大响应表现为中段大于东段和西段，NDVI对气温和降水变化的最大响应滞后期呈现出西段〉中段〉东段的空间分布特征。
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| 关 键 词： | SPOTVGT-NDVI 气温 降水 祁连山 |
Ten-day response of vegetation NDVI to the variations of temperature and precipitation in Qilian Mountains based on GIS |
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| DAI Shengpei,ZHANG Bo College of Geography , Environmental Science,Northwest Normal University,Lanzhou ,China.Ten-day response of vegetation NDVI to the variations of temperature and precipitation in Qilian Mountains based on GIS[J].Ecology and Environmnet,2010(1):140-145. |
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| Authors: | DAI Shengpei ZHANG Bo College of Geography Environmental Science Northwest Normal University Lanzhou China |
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| Institution: | DAI Shengpei,ZHANG Bo College of Geography , Environmental Science,Northwest Normal University,Lanzhou 730070,China |
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| Abstract: | This paper analyzed the spatio-temporal variations and the spatio-temporal responses of vegetation NDVI to the variations of temperature and precipitation in each ten-days period in the whole year,spring,summer and autumn covering 1998 to 2007 based on the SPOT VGT-NDVI data and ten-day temperature and precipitation data from 11 meteorological stations in Qilian Mountains.The results show that:the maximum values of annual NDVI has been increased with an rate of 3.1%/10a and the greening area,stable area,and... |
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| Keywords: | SPOT VGT-NDVI temperature precipitation Qilian Mountains |
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