Evaluating the changes and driving factors of carbon storage using the PLUS-InVEST Model:A case study of Napa Sea Basin
Taking the Napa Sea basin as the study area,by using the PLUS-InVEST model and geographic detector methods.Providing a scientific understanding on change pattern of carbon sink function in this basin,evolution patterns of spatial and temporal driving factors of carbon storage were studied over the past 20 years,and the evolution tendency were predicted in future under four kinds of different scenarios based on the PLUS-InVEST model in Napa Sea Basin.The results showed:(1)From 2000 to 2020,water area and construction land respectively increased by 143.98%and 451.86%,and farmland and grassland respectively decreased by 61.37%and 20.53%.Farmland and grassland was mainly transferred to construction land,some grassland transferred to forest land.(2)In the past 20years,carbon storage showed a downward trend,with a total decreased of 0.63×106 tons.Decline of grassland and farmland and increase of construction land were the main reasons for decrease of carbon storage in the basin.(3)Compared carbon storage under different scenarios in 2020with in 2035,its will increase under two kinds of scenarios except for the natural development and cultivated land protection scenario,and total carbon storage will be respectively 18.11×106t,18.17×106t,18.31×106 and 18.29×106t for each scenario.(4)DEM(0.533),mean annual temperature(0.442),and NDVI(0.365)were the dominant factors driving the evolution of carbon storage in the basin.(5)The interaction effects among the driving factors was stronger than that of single factors,and synergistic effect of DEM and NDVI(0.633)was the strongest.The results can provide data support for how to improve rationality of land use and function of carbon sink scientifically in Napa Sea Basin.
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