森林植被净初级生产力与气候因子关系研究——以京津冀地区为例

Study on the relationship between net primary productivity and climate factors——A case study of Jing-Jin-Ji region

森林生态系统生产力在区域生态发展和气候变化研究中具有重要的现实意义,而植被净初级生产力(NPP)的计算是生态系统生产力研究的重要内容。基于遥感和GIS技术,利用MODIS遥感产品MOD17A3数据和气象数据,研究了2000—2014年间NPP的分布及其与气候因子的关系。采用相关分析的方法分别从空间上与时间上研究森林植被NPP与气候因子的相关关系,探究京津冀地区近15 a NPP时空分布变化规律及其对气候变化的响应规律。从空间分布整体情况来看,气温和降水量均对NPP有正相关影响。从时间相关性来看,NPP与年降水量为正相关关系,NPP随年降水量的增大而增大。并根据所得结论为京津冀地区生态发展提出提高植被生产力的相关建议和对生态现状的改进措施。

Forest ecosystem productivity plays an important role in the regional development and climate change research, and the calculation of NPP is an important part of the study of ecosystem productivity. Based on remote sensing and GIS technology, this paper used MOD17A3 product data and meteorological data to study NPP distribution and its relationship with climate change in Beijing- Tianjin-Hebei region from 2000 to 2014. We use correlation analysis method to determine the correlation between NPP and climatic factors, to explore the effects of climate change on forest Net Primary Productivity in Beijing-Tianjin-Hebei region in past 15 years. Based on the situation of NPP spatial distribution, temperature and precipitation has a positive correlative effect on NPP.NPP is positive correlation with annual precipitation,and it increases with the increase of annual precipitation.It puts forward suggestions to improve vegetation productivity and improvement measures on the current ecological status in Jing-Jin-Ji region.