摘要
京津冀地区植被净初级生产力(NPP)的研究对于该区域自然植被的可持续发展具有重要的指导意义。利用2000—2015年MODIS17A3数据集,通过简单差值法、变异系数法和一元线性回归法,主要分析了京津冀地区16年来植被净初级生产力时空格局及其变化趋势,同时分析气温、降水、土地利用变化等影响因素与植被NPP之间的关系。结果表明:一是2000—2015年京津冀地区植被NPP均值主要集中在200~400gC/(m²·a),空间分布上呈现东南高、西北低的特点;二是时间尺度上,该区域内植被NPP呈现轻微增长的趋势;三是降水量变化对植被NPP影响更为显著,耕地、林地变化情况与植被NPP的关系较为密切。
The study of the net primary productivity of vegetation(NPP)in Beijing-Tianjin-Hebei region has an important guiding significance for the sustainable development of natural vegetation in this region.In this paper,using the dataset of MODIS17A3 from 2000 to 2015,the spatial and temporal patterns of NPP of the vegetation in Beijing-Tianjin-Hebei region over 16 years and their trends were analyzed through the simple difference method,the coefficient of variation method,and the linear regression method.The relationship between relevant factors such as temperature,precipitation,land-use change,and NPP was also analyzed.The results show that,first,the average NPP of vegetation in Beijing-Tianjin-Hebei region from 2000 to 2015 is mainly 200~400gC/(m²·a),and the spatial distribution is high in the southeast and low in the northwest.Second,on the time scale,NPP of vegetation in the region shows a slight growth trend.Third,the change of precipitation has a more significant impact on NPP of vegetation,and the change of cultivated land and forest land is closely related to NPP of vegetation.
作者
孙小博
SUN Xiaobo(School of Geomatics and Urban Spatial Informatics,Beijing University of Civil Engineering andArchitecture,Beijing,102616 China)
出处
《科技创新导报》
2022年第28期11-15,共5页
Science and Technology Innovation Herald
