Research on Spatial Distribution of Carbon Source/Sink of Liaoning Province based on MODIS GPP Data Products

The carbon sink function of terrestrial ecosystem is an important aspect of ecosystem service function, playing an important role in mitigating climate change. Accurate assessment of the spatial and temporal change of carbon source / sink of terrestrial ecosystem is an important basis for predicting climate change effectively. Based on the relationship between all forming fluxes of regional carbon source / sink combining with MODIS GPP data products and regional statistical data, we analyzed the spatial distribution carbon source / sink of Liaoning province from 2000 to 2014. Results show that: ①The spatial distribution of carbon source / sink decreased from eastern to western, with the highest value appearing at the eastern (>250 gC m^-2 a^-1). There are significant carbon source in the central, western and northern of Liaoning province. ②The total carbon emission of Shenyang(1.43 TgC a^-1) accounted for about one third of Liaoning province(4.56 TgC a^-1). Therefore, Shenyang is the major city of carbon emission in Liaoning province. ③Shenyang is a carbon source. The urban areas of Shenyang showed a lowest carbon emission (only 26 gC m^-2 a^-1). This paper conducted regional simulation of carbon source / sink, providing theoretical basis and methodological references for the related studies in other regions.