Modeling Regional Vegetation NPP Variations and Their Relationships with Climatic Parameters in Wuhan, China

Earth Interactions

LuncheWang¹ 

关键词: NPP;    PAR;    EVI;    FPAR;    Time-lagged serial correlation analysis;   

DOI  :  10.1175/2012EI000478.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractNet primary productivity (NPP) is an important component of the carbon cycle and a key indicator of ecosystem performance. The aim of this study is to construct a more accurate regional vegetation NPP estimation model and explore the relationship between NPP and climatic factors (air temperature, rainfall, sunshine hours, relative humidity, air pressure, global radiation, and surface net radiation). As a key variable in NPP modeling, photosynthetically active radiation (PAR) was obtained by finding a linear relationship between PAR and horizontal direct radiation, scattered radiation, and net radiation with high accuracy. The fraction of absorbed photosynthetically active radiation (FPAR) was estimated by enhanced vegetation index (EVI) instead of the widely used normalized difference vegetation index (NDVI). Stress factors of temperature/humidity for different types of vegetation were also considered in the simulation of light use efficiencies (LUE). The authors used EVI datasets of Moderate Reso...

【 授权许可】

Unknown