2000-2014年福建省植被覆盖对气候因子变化的响应

Changes of Vegetation and Its Response to the Climate in Fujian Province,During 2000-2014

基于福建省2000-2014年MOD13A3数据和23个气象站点逐日气温和降水数据,研究年际、季节和月3个时间尺度下NDVI和气候因子的相关性.结果表明:年际尺度上,福建省植被变化与气温变化呈高度相关性(r=0.584);植被生长在不同季节对水热条件变化响应不同,夏季和秋季植被生长与气温相关关系最密切,春季植被生长主要受降水变化影响,但相关性均不显著;月尺度上,2、6和11月份NDVI受气温变化影响最明显,3-5和11月份植被生长与前2月气温变化关系密切,同时受气候变暖影响,植被表现出生长季提前的特征;对于降水因子,7-10月份NDVI与前2月降水变化关系密切,存在植被生长对降水变化滞后响应特征.

Based on daily temperature and precipitation data at 23 meteorological stations and, MOD13A3 data in Fujian province during 2000 -2014, this paper analyzed the correlation between NDVI and climatic factors at different time scales including annual, seasonal and monthly scale. The results showed changes in vegetation in Fujian and temperature changes were highly correlated （ r = 0. 584） with precipitation and temperature at inter-annual scale： The growth of vegetation responses vary in different seasons. Temperatures and vegetation growth has the most closely relation in summer and autumn. The vegetation growth in spring is mainly affected by precipitation, but the correla- tion was not significant. At monthly scale, NDVI of June and November was obvious affected by temperature, while NDVI of March to May and November are closely related, and NDVI from July to October and February exhibited closely relation with precipitation. The growth of vegetation was affected by climate warming, and the response of vegetation is delayed to the climatic change.