中国东部季风区植被物候季节变化对气候响应的大尺度特征:多年平均结果

Large Scale Features of the Seasonal Phenological Responses to the Monsoon Climate in East China: Multi-Year Average Results

利用１９８２～１９９３年ＮＯＡＡ／ＮＡＳＡ Ｐａｔｈｆｉｎｄｅｒ ＡＶＨＲＲ陆地数据集中的规一化植被指数（ＮＤＶＩ）数据集，对中国东部植被季节生长的阶段性进行了划分。在此基础上，对植被季节生长对气候响应的多年平均状况进行了分析，发现在多年平均意义上，（１）中国东部植被生长在各生长阶段都同步响应于温度的季节变化；（２）在多数时段，中国东部植被生长与降水的季节变化存在显著相关关系，植被生长滞后于降水变化，滞后时间为２０～３０天。通过本文的研究，在中国东部季风区，有关植被季节生长对气候响应大尺度特征的多年平均状况的定性认识得到定量化的表达，为改进陆面过程描述、提高对中国东部区域气候的长期模拟能力提供了一定的依据。

The phases of the seasonal phenology in East China were determined with the normalized difference vegetation index (NDVI) data set in the NOAA / NASA Pathfinder AVHRR data sets from 1982 to 1993. Based on such a determination, the large scale features of the seasonal phenological responses to the monsoon climate in East China were analyzed. (1) In multi-year average, the seasonal phenojogy keeps the significant simultaneous correlation with temperature variation in all the phases. (2) In multi-year average, in most phases, the seasonal phenology and the precipitation variation have their significant correlation with the time lags from 20 to 30 days. The above two results improve the qualitative knowledge before by quantifying the large scale features of the seasonal phenological responses to monsoon climate in East China. The results are potential in the modification of the descriptions of the land surface processes for the capacity of long-term numerical modeling of regional climate in East China.