Research progress on spatialtemporal dynamic simulation model ofnet primary productivity of terrestrial ecosystems

Estimation of Net primary productivity (NPP) in terrestrial ecosystems is center issue in the study of global change. NPP is the total carbon fixed by plant photosynthesis in a year. In recent years, remote sensing data were introduced into establishment of NPP model and practice estimation. This already has developed into a new study method and a new trend. The method makes a possibility to estimate NPP in regional or global scales with details from remote sensing technology. In this paper, study history of NPP, the advantages and disadvantages of Statistical climatecorrelation models, Ecosystem process models and Light utilization efficiency models were reviewed and compared. Characteristics and research progress of three types of spatialtemporal dynamic simulation model, CASA, CFIX and BIOMEBGC, were explained and analyzed. At the same time, some problems in NPP models were pointed out and studies in further were emphasized.