Soil Organic Carbon Lateral Movement Processes Integrated Into a Terrestrial Ecosystem Model

Autor: Haibo Lu, Xiaoyuan Wang, Haicheng Zhang, Xianhong Xie, Mahdi Nakhavali, Timothy A. Quine, Wenfang Xu, Jiangzhou Xia, Bin He, Zhixin Hao, Xiu Geng, Wenping Yuan
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of Advances in Modeling Earth Systems, Vol 16, Iss 1, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 1942-2466
DOI: 10.1029/2023MS003916
Popis: Abstract Lateral movement of soil organic carbon (SOC) induced by soil erosion and runoff changes spatial distributions of SOC, and further changes the land‐atmosphere CO2 exchange and terrestrial carbon budget. However, current ecosystem models do not or only poorly integrate the process of SOC lateral movement and cannot simulate the impacts of soil erosion on the carbon cycle. This study integrated SOC erosion and deposition processes into a process‐based ecosystem model (i.e., Integrated BIosphere Simulator (IBIS)), and separately simulated the lateral movements of dissolved organic carbon (DOC) and particulate organic carbon (POC). The model was evaluated in three river basins in Northeast China that are dominated by cropland, forest, and grassland. The results showed that the model reproduced well the production, erosion, and deposition of DOC and POC. The annual SOC lateral movement (1.34–7.22 g C m−2 yr−1) induced by erosion in the three tested basins was 0.27%–1.45% of the annual net primary production. The model developed in this study has great implications for simulating the lateral movements of SOC in terrestrial ecosystems, which can improve model performance in projecting the terrestrial carbon budget.
Databáze: Directory of Open Access Journals
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