title: Inclusion of soil carbon lateral movement alters terrestrial carbon budget in China.
abstract: The lateral movement of soil carbon has a profound effect on the carbon budget of terrestrial ecosystems; however, it has never been quantified in China, which is one of the strongest soil erosion areas in the world. In this study, we estimated that the overall soil erosion in China varies from 11.27 to 18.17 Pg yr(-1) from 1982 to 2011, accounting for 7-21% of total soil erosion globally. Soil erosion induces a substantial lateral redistribution of soil organic carbon ranging from 0.64 to 1.04 Pg C yr(-1). The erosion-induced carbon flux ranges from a 0.19 Pg C yr(-1) carbon source to a 0.24 Pg C yr(-1) carbon sink in the terrestrial ecosystem, which is potentially comparable in magnitude to previously estimated total carbon budget of China (0.19 to 0.26 Pg yr(-1)). Our results showed that the lateral movement of soil carbon strongly alters the carbon budget in China, and highlighted the urgent need to integrate the processes of soil erosion into the regional or global carbon cycle estimates.
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Haicheng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Engineering Laboratory of Southern Forestry Applied Ecology and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, China.
authors.forename: Shuguang
authors.initials: S
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Wenping
authors.initials: W
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Dong
authors.affiliation: College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China.
authors.forename: Aizhong
authors.initials: A
authors.lastname: Ye
authors.affiliation: College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China.
authors.forename: Xianhong
authors.initials: X
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Cai
authors.affiliation: College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China.
authors.forename: Yuna
authors.initials: Y
authors.lastname: Mao