摘要
利用1982—2001年美国国家航天航空局(NASA)的归一化植被指数(NDVI)资料以及55个青藏高原地区气象台站实测的最高气温、最低气温、平均气温和降水资料,初步分析了青藏高原地区各季节植被变化特征及其对气候变化的影响,通过分析发现,各季节青藏高原地区NDVI均以增长为主。特别是高原南部、北部和西部等地区增加明显,高原中东部地区植被有所减少。通过相关分析和台站概率相关分析发现,高原冬季和春季NDVI与后期春季和夏季的最高气温、最低气温、平均气温和降水有较好的正相关关系,但有的表现在相关系数比较显著,有的表现为概率相关较明显。
Based on the NDVI data during 1982-2001 and the station observed data involving the annual amount precipitation the NDVI change features in the Tibetan Plateau and its relationships with the climate variation are investigated. The results show that the vegetation activity displays a gradual enhancement in an oscillatory manner during 1982-2001: an increasing trend is apparent in the north, west, and south; and worse in the east-central regions. There exist lag correlations between the NDVI in winter and spring and the climate in spring and summer in the Tibetan Plateau. The preferable correlation exhibits striking regional differences.
出处
《成都信息工程学院学报》
2006年第z1期12-17,共6页
Journal of Chengdu University of Information Technology
基金
国家自然科学基金资助项目(40675037)
四川省青年科技基金资助项目(05ZQ026-023)
