MEASUREMENT AND TEMPORAL-SPATIAL PATTERN EVOLUTION OF CARBON SEQUESTRATION AND VALUES OF SHAANXI'S ECO-SYSTEM
Functional carbon sequestration of eco-system is one of key ways to carbon neutralization.This paper,from perspective of land use,uses carbon sequestration rating to estimate the 2000 and 2020 carbon sequestration and values of Shaanxi's county-level forest,grasslands and wetlands ecosystems,and applies spatial statistics to reveal its temporal-spatial evolution.During 2000 to 2020,their carbon sequestration has increased at different levels,of which forest increased the most as the biggest contributor to Shaanxi's eco-system.Carbon sequestration of Shaanxi's county-level forests and grasslands is of outstandingly spatial clustering,carbon sequestration hotspots of forests are concentrating in Qinling mountainous area,that of grasslands in northern Shaanxi's Great Wall Windy & Sandy Area,cold spots are all concentrating in Guanzhong plain.Southern Shaanxi's Qinba mountainous area has the most capability in carbon sequestration,while northern Shaanxi's loess hilly valley has the biggest increment.All cities have increased their carbon sequestration except Xi'an,Yan'an and Yulin are the top two in growth.The top 5 cities in carbon sequestration values in Shaanxi's eco-system are Hanzhong,Yan'an,Ankang,Baoji and Shangluo,amounting to 78.33%of the entire province.
eco-systemcarbon sequestrationcarbon sinkShaanxi province