气候变化领域集成服务门户(CCPortal): High-resolution mapping of the global silicate weathering carbon sink and its long-term changes

CCPortal

DOI	10.1111/gcb.16186
	High-resolution mapping of the global silicate weathering carbon sink and its long-term changes
	Li, Chaojun; Bai, Xiaoyong; Tan, Qiu; Luo, Guangjie; Wu, Luhua; Chen, Fei; Xi, Huipeng; Luo, Xuling; Ran, Chen; Chen, Huan; Zhang, Sirui; Liu, Min; Gong, Suhua; Xiong, Lian; Song, Fengjiao; Xiao, Biqin; Du, Chaochao
发表日期	2022
ISSN	1354-1013
EISSN	1365-2486
起始页码	4377
结束页码	4394
卷号	28 期号:14
英文摘要	Climatic and non-climatic factors affect the chemical weathering of silicate rocks, which in turn affects the CO2 concentration in the atmosphere on a long-term scale. However, the coupling effects of these factors prevent us from clearly understanding of the global weathering carbon sink of silicate rocks. Here, using the improved first-order model with correlated factors and non-parametric methods, we produced spatiotemporal data sets (0.25 degrees x 0.25 degrees) of the global silicate weathering carbon-sink flux (SCSF alpha) under different scenarios (SSPs) in present (1950-2014) and future (2015-2100) periods based on the Global River Chemistry Database and CMIP6 data sets. Then, we analyzed and identified the key regions in space where climatic and non-climatic factors affect the SCSF alpha. We found that the total SCSF alpha was 155.80 +/- 90 Tg C yr(-1) in present period, which was expected to increase by 18.90 +/- 11 Tg C yr(-1) (12.13%) by the end of this century. Although the SCSF alpha in more than half of the world was showing an upward trend, about 43% of the regions were still showing a clear downward trend, especially under the SSP2-4.5 scenario. Among the main factors related to this, the relative contribution rate of runoff to the global SCSF alpha was close to 1/3 (32.11%), and the main control regions of runoff and precipitation factors in space accounted for about 49% of the area. There was a significant negative partial correlation between leaf area index and silicate weathering carbon sink flux due to the difference between the vegetation types. We have emphasized quantitative analysis the sensitivity of SCSF alpha to critical factors on a spatial grid scale, which is valuable for understanding the role of silicate chemical weathering in the global carbon cycle.
英文关键词	carbon sink; climate change; modeling; rock weathering; silicate; spatio-temporal evolution
语种	英语
WOS研究方向	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000783565600001
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280966
作者单位	Chinese Academy of Sciences; Guiyang Institute of Geochemistry, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Guizhou Normal University; Guizhou Education University
推荐引用方式 GB/T 7714	Li, Chaojun,Bai, Xiaoyong,Tan, Qiu,et al. High-resolution mapping of the global silicate weathering carbon sink and its long-term changes[J],2022,28(14).
APA	Li, Chaojun.,Bai, Xiaoyong.,Tan, Qiu.,Luo, Guangjie.,Wu, Luhua.,...&Du, Chaochao.(2022).High-resolution mapping of the global silicate weathering carbon sink and its long-term changes.GLOBAL CHANGE BIOLOGY,28(14).
MLA	Li, Chaojun,et al."High-resolution mapping of the global silicate weathering carbon sink and its long-term changes".GLOBAL CHANGE BIOLOGY 28.14(2022).