Extraterritorial effect of carbon sequestration service in the Yellow River Estuary National Park and carbon sink compensation from perspective of carbon neutrality

This article takes the newly established Yellow River Estuary National Park as a case, explores the supply and demand of carbon sequestration services in the Yellow River Estuary National Park from the perspective of carbon neutrality and its decarbonization effect on the surrounding areas, and simulates the extraterritorial effect of carbon sequestration services in the study area through the ecological radiation force model, and explores its horizontal ecological compensation value from the perspectives of the compensating party and the compensated party, so as to provide some reference for the compensation of carbon sinks in national parks.The results show that: 1) The Yellow River Estuary National Park is rich in carbon sink resources, with a total supply of carbon sequestration services exceeding the demand. In addition to offsetting its own carbon emissions, there is sufficient surplus space to absorb approximately 15.4054 million tons of carbon dioxide from surrounding areas. 2) In addition to the Yellow River Estuary National Park, carbon supply and demand conditions in other counties and districts in Dongying City vary significantly. Only the Hekou District has a surplus space of 4.2328 million tons of carbon dioxide after meeting its own carbon sequestration needs to offset the emissions from other counties and districts. The Kenli District, Lijin County, Dongying District, and Guangrao County all have insufficient carbon sequestration services, and are relying on supplies from other regions to offset their unsequestered carbon. 3) The Yellow River Estuary National Park can build a carbon sink compensation and carbon emission trading system based on the balance of supply and demand of carbon sequestration services and the extraterritorial effect of carbon sequestration services based on the ecological radiation force model simulation, and promote the economic value transformation of carbon sink resources. In order to better realize the ecological protection and regional coordinated development of national parks, it is also of practical significance to effectively utilize the carbon sink function of national parks and enrich their sustainable development path.