摘要
在西藏林芝地区不同植被类型同期的两套NDVI数据(GIMMS和SPOT-NDVI)显著相关的基础上,通过回归方程插值形成了近30 a来的不同植被类型的NDVI序列数据。结果表明,近30 a来,林芝地区所有植被类型春季的NDVI,在春季升温导致的生长季提前的驱动下,都表现出显著的上升趋势。位于林线之上的高寒灌草地和高山草甸受气温上升的驱动,夏季和秋季的NDVI也都表现出较明显的增长趋势,而位于中低海拔的常绿植被在NDVI值最高的季节(秋季或冬季)没有显著的变化。总的来看,近30 a来,研究区气温上升趋势明显,植被总体呈现生长趋好的趋势。
Based on the significant correlations between Global Inventory Modeling and Mapping Studies（GIMMS） and SPOT-Normalized Difference Vegetation Index（NDVI） across different vegetation types in Linzhi Area,nearly 30-year NDVI data of main vegetation types were interpolated.The results showed that,driven by the increasing temperature in spring,the growing seasons of all vegetation types began earlier and the NDVI increased significantly in the past 30 years.Following the ascending of temperature,the NDVI of alpine shrub-grasslands and meadows increased in summer/autumn,but the evergreen vegetations demonstrated no clear trend in autumn/winter,when the NDVI values arrived at their maximum.In general,during the past 30 years,the air temperature increased and the vegetation showed the trend of getting better in the study area.
出处
《西北林学院学报》
CSCD
北大核心
2011年第4期69-74,共6页
Journal of Northwest Forestry University
基金
林业公益性行业科研专项"中国森林对气候变化的影响与林业适应对策"子项目"藏东南高山林线对气候变化的响应和敏感性研究"(200804001)
中国人民大学科学研究基金(中央高校基本科研业务费资金)项目(10XNK131)
