| 距平植被指数在1992年特大干旱监测中的应用 |
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| 引用本文： | 陈维英,肖乾广,盛永伟.距平植被指数在1992年特大干旱监测中的应用[J].遥感学报,1994(2). |
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| 作者姓名： | 陈维英 肖乾广 盛永伟 |
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| 作者单位： | 国家气象局卫星气象中心 |
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| 摘 要： | 本文重点阐述ＮＯＡＡ极轨气象卫星距平植被指数的处理技术及算法，以及在１９９２年干旱监测中的应用。距平植被指数是以归一化植被指数（ＮＤＶＩ）多年旬、月平均值作为背景，然后用当年旬、月的ＮＤＶＩ值减去背景值。植被指数的距平值不仅反映了植被年际间的变化，而且也指示了天气对植被的影响。用这个量监测农作物是否遭到旱灾威胁比只用ＮＤＶＩ的瞬时值优越。研究结果表明当月的距平植被指数与当月降水量距平百分率相一致。
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| 关 键 词： | 干旱监测，归一化植被指数，距平植被指数，降水距平百分率，背景值 |
Application of the Anomaly Vegetation Index to Monitoring Heavy Drought in 1992 |
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| Chen Weiying,Xiao Qianguang,Sheng Yongwei.Application of the Anomaly Vegetation Index to Monitoring Heavy Drought in 1992[J].Journal of Remote Sensing,1994(2). |
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| Authors: | Chen Weiying Xiao Qianguang Sheng Yongwei |
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| Abstract: | This paper discribes a processing technique and a algorithm of ano-maly vegetation index of NOAA polar orbit meteorological Satellite,and their appli-cation to monitoring drought.Multiyear every ten-day mean and monthly mean no-rmalized difference vegetation index(NDVI)are used as the background value foranomaly vegetation index,and then the backgroud value is subtracted by currentlyyear every ten-day and monthly NDVI data to obtain anomaly value of vegetationindex. It reflects not only vegetation changes between years,but also indicates theweather impact on vegetation. The anomaly vegetation index is superior to NDVIwhen it is used for monitoring drought.It has a better relationship with monthlyprecipitation anomaly precentage. |
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| Keywords: | Drought monitoring Normalized difference vegetation index Anomalyvegetation index Precipitation anomaly percentage Background value |
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