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County-level CO2 emissions and sequestration in China during 1997–2017

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  • Jiandong Chen
  • Ming Gao
  • Shulei Cheng
  • Wenxuan Hou
  • Malin Song
  • Xin Liu
  • Yu Liu
  • Yuli Shan

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Original languageEnglish
JournalScientific Data
DOIs
Publication statusPublished - 12 Nov 2020

Abstract

With the implementation of China’s top-down CO2 emissions reduction strategy, the regional differences should be considered. As the most basic governmental unit in China, counties could better capture the regional heterogeneity than provinces and prefecture-level city, and county-level CO2 emissions could be used for the development of strategic policies tailored to local conditions. However, most of the previous accounts of CO2 emissions in China have only focused on the national, provincial, or city levels, owing to limited methods and smaller-scale data. In this study, a particle swarm optimization-back propagation (PSO-BP) algorithm was employed to unify the scale of DMSP/OLS and NPP/VIIRS satellite imagery and estimate the CO2 emissions in 2,735 Chinese counties during 1997–2017. Moreover, as vegetation has a significant ability to sequester and reduce CO2 emissions, we calculated the county-level carbon sequestration value of terrestrial vegetation. The results presented here can contribute to existing data gaps and enable the development of strategies to reduce CO2 emissions in China.

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