梁芸,金文岩,郭铌,刘世祥,韩涛.陇东地区植被指数NDVI与降水的关系研究[J].干旱地区农业研究,2009,27(6):247~251
陇东地区植被指数NDVI与降水的关系研究
Study on correlation between NDVI and precipitation in Longdong
  
DOI：10.7606/j.issn.1000-7601.2009.06.47
中文关键词:  植被指数  标准化降水指数  陇东
英文关键词:NDVI  SPI  Longdong
基金项目:兰州干旱气象研究所干旱气象科学研究基金(IAM200815)； 甘肃省气象局科研项目(2008-08)
作者单位
梁芸 Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020, China；Lanzhou Regional Climate Center, Lanzhou, Gansu 730020, China 
金文岩 Pulandian Meteorological Bureau of Liaoning Province, Pulandian, Liaoning 116200, China 
郭铌 Lanzhou Regional Climate Center, Lanzhou, Gansu 730020, China 
刘世祥 Lanzhou Central Meteorological Observatory, Lanzhou, Gansu 730020, China 
韩涛 Lanzhou Regional Climate Center, Lanzhou, Gansu 730020, China 
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中文摘要:
      利用1982~2003年NOAA/AVHRR(advanced very high resolution rediometer)资料及同期的降水资料,对甘肃省陇东地区半干旱区环县和半湿润区西峰的植被指数NDVI与不同时间尺度的标准化降水指数SPI进行相关分析。结果表明:在植被生长季,植被对降水的敏感程度半干旱区大于半湿润区;大多数月NDVI与3-SPI的相关系数较高,而与1-SPI较低;半干旱区和半湿润区NDVI的年变化幅度分别为:-12%10%和-10%13%,半干旱区NDVI的年变化与SPI变化趋势吻合较好,显著相关(P<0.05),而在半湿润区二者并不显著;半干旱区的年NDVI与四季降水均显著相关(P<0.05),而半湿润区年NDVI只与冬春季的降水显著相关(P<0.05)。
英文摘要:
      Normalized difference vegetation index(NDVI) can be characterized as an indicator of vegetable growing conditions while precipitation resources is a key factor to affect the vegetable growing conditions and ecological construction in Longdong of Gansu.The correlation between NDVI and different-temporal-scale standard precipitation index(SPI) in Longdong of Gansu are studied based on the data of NOAA/AVHRR and precipitation over the same period in 1982～2003.The results show:(1) The sensitivity of vegetable to precipitation is more significant to semi-arid area than semi-humid area in vegetable growing season;(2) The most significant correlation is found in NDVI and 3-SPI while the most insignificant is in NDVI and 1-SPI;(3) The annual-variational amplitudes of NDVIs are-12%～10% in semi-arid area and-10%～13% in semi-humid area,respectively,which agree well with SPI in the former at 95% significant level (P<0.05), but not significant in the latter;(4) Annual NDVIs are significantly correlated with the precipitations of four seasons in arid area (P<0.05) while significant only in winter and spring in semi-humid area.
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