河北省植被覆盖对气候变化的响应

Vegetation Change and Its Response to Climate in Hebei Province

［目的］ 研究河北地区植被覆盖变化与气候变化的关系。［方法］ 利用1982~2000年NOAA 归一化植被指数（NDVI）数据，结合19个气象站点的气温和降水量数据，采用最大值合成法、相关分析法以及偏相关分析法，分别从年平均和季节平均变化方面分析河北省植被覆盖变化与气候变化的相互关系。［结果］ 在年平均上，河北省植被覆盖与气温的变化关系大于植被覆盖与降水量的变化关系；在季节平均上，在研究区春、夏、秋季植被生长对气温和降水量的需求不同，春秋两季气温对植被生长有较为密切的关系，而夏季降水量则是植被生长更为重要的因子。［结论］ 除夏季外，河北省植被覆盖对气温变化的响应较为明显。

[ Objective] The research aimed to reveal the relationship between the vegetation change and the climate change in Hebei Province. [ Method] We used the NDVI data of 1982 -2000 NOAA combined with air temperature and precipitation data of 19 meteorological stations in the area. And we adopted the maximum synthesis, correlation analysis and partial correlation analysis to study the vegetation change and its relation- ship with climate change from two time scales （inter annual and seasonal variation）. [ Result] From the view of the inter-annual change, the re- lationship of vegetation change and temperature change was more close than precipitation in Hebei. From the view of seasonal var/ation, the vege- tation growth in the research area was different in response to the changes in different seasons of different hydrothermal conditions. Vegetation growth was in relation to air temperature in spring and autumn, and the growth of vegetation was affected by precipitation in summer. [ Conclusion] The response of vegetation cover to temperature change is more obvious than precipitation in addition to the summer in Hebei Province.