气候变化领域集成服务门户(CCPortal): Carbon cycle responses to climate change across China's terrestrial ecosystem: Sensitivity and driving process

CCPortal

DOI	10.1016/j.scitotenv.2024.170053
	Carbon cycle responses to climate change across China's terrestrial ecosystem: Sensitivity and driving process
	Jiao, Kewei; Liu, Zhihua; Wang, Wenjuan; Yu, Kailiang; Mcgrath, Matthew Joseph; Xu, Wenru
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	915
卷号	915
英文摘要	Investigations into the carbon cycle and how it responds to climate change at the national scale are important for a comprehensive understanding of terrestrial carbon cycle and global change issues. Contributions of carbon fluxes to the terrestrial sink and the effects on climate change are still not fully understood. In this study, we aimed to explore the relationship between ecosystem production (GPP/SIF/NDVI) and net ecosystem carbon exchange (NEE) and to investigate the sensitivity of carbon fluxes to climate change at different spatio-temporal scales. Furthermore, we sought to delve into the carbon cycle processes driven by climate stress in China since the beginning of the 21st century. To achieve these objectives, we employed correlation and sensitivity analysis techniques, utilizing a wide range of data sources including ground-based observations, remote sensing observations, atmospheric inversions, machine learning, and model simulations. Our findings indicate that NEE in most arid regions of China is primarily driven by ecosystem production. Climate variations have a greater influence on ecosystem production than respiration. Warming has negatively impacted ecosystem production in Northeast China, as well as in subtropical and tropical regions. Conversely, increased precipitation has strengthened the terrestrial carbon sink, particularly in the northern cool and dry areas. We also found that ecosystem respiration exhibits heightened sensitivity to warming in southern China. Moreover, our analysis revealed that the control of terrestrial carbon cycle by ecosystem production gradually weakens from cold/arid areas to warm/humid areas. We identified distinct temperature thresholds (ranging from 10.5 to 13.7 degrees C) and precipitation thresholds (approximately 1400 mm yr(-1)) for the transition from production-dominated to respiration-dominated processes. Our study provides valuable insights into the complex relationship between climate change and carbon cycle in China.
英文关键词	Terrestrial ecosystem; Climate change; Carbon sink; GPP; Sensitivity; China
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001162882300001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/307019
作者单位	Chinese Academy of Sciences; Shenyang Institute of Applied Ecology, CAS; Chinese Academy of Sciences; Northeast Institute of Geography & Agroecology, CAS; Princeton University; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); Universite Paris Saclay; CEA; Universite Paris Cite
推荐引用方式 GB/T 7714	Jiao, Kewei,Liu, Zhihua,Wang, Wenjuan,et al. Carbon cycle responses to climate change across China's terrestrial ecosystem: Sensitivity and driving process[J],2024,915.
APA	Jiao, Kewei,Liu, Zhihua,Wang, Wenjuan,Yu, Kailiang,Mcgrath, Matthew Joseph,&Xu, Wenru.(2024).Carbon cycle responses to climate change across China's terrestrial ecosystem: Sensitivity and driving process.SCIENCE OF THE TOTAL ENVIRONMENT,915.
MLA	Jiao, Kewei,et al."Carbon cycle responses to climate change across China's terrestrial ecosystem: Sensitivity and driving process".SCIENCE OF THE TOTAL ENVIRONMENT 915(2024).