Spatial-temporal Variation of Net Primary Productivity of Vegetation in Jinan Based on Satellite Remote Sensing
Based on the improved CASA Model,the annual and monthly high spatial resolution(30 m)net primary productivity(NPP)of 2021 Jinan was estimated through using a combination of multi-source satellite data.Also the temporal and spatial distribution characteristics of vegetation NPP were analyzed.The results showed that,the mean value of NPP in Jinan was 239.04 g·m-2·a-1,which showed the spatial distribution characteristics of high and low in the southern mountain area of northern plain.The annual vegetation NPP showed a single-peak pattern,which first increased and then decreased,and reached its peak in August,with obvious seasonal difference.The contribution of summer vegetation NPP to the annual NPP reached 58.06%.The correlation analysis showed that temperature had more influence on vegetation NPP than precipitation.Mixed forest is the largest vegetation type of NPP,and arable land and broad-leaved forest were the main types of vegetation in Jinan,accounting for 66.22%of the total NPP.
net primary productivity of vegetationCASA modelspace-time distributionhigh spatial resolutionJinan
NETL
NSTL
万方数据
