气候变化领域集成服务门户(CCPortal): The land-to-ocean loops of the global carbon cycle

CCPortal

DOI	10.1038/s41586-021-04339-9
	The land-to-ocean loops of the global carbon cycle
	Regnier, Pierre; Resplandy, Laure; Najjar, Raymond G.; Ciais, Philippe
发表日期	2022
ISSN	0028-0836
EISSN	1476-4687
起始页码	401
结束页码	410
卷号	603 期号:7901
英文摘要	Carbon storage by the ocean and by the land is usually quantified separately, and does not fully take into account the land-to-ocean transport of carbon through inland waters, estuaries, tidal wetlands and continental shelf waters-the 'land-to-ocean aquatic continuum' (LOAC). Here we assess LOAC carbon cycling before the industrial period and perturbed by direct human interventions, including climate change. In our view of the global carbon cycle, the traditional 'long-range loop', which carries carbon from terrestrial ecosystems to the open ocean through rivers, is reinforced by two 'short-range loops' that carry carbon from terrestrial ecosystems to inland waters and from tidal wetlands to the open ocean. Using a mass-balance approach, we find that the pre-industrial uptake of atmospheric carbon dioxide by terrestrial ecosystems transferred to the ocean and outgassed back to the atmosphere amounts to 0.65 +/- 0.30 petagrams of carbon per year (+/- 2 sigma). Humans have accelerated the cycling of carbon between terrestrial ecosystems, inland waters and the atmosphere, and decreased the uptake of atmospheric carbon dioxide from tidal wetlands and submerged vegetation. Ignoring these changing LOAC carbon fluxes results in an overestimation of carbon storage in terrestrial ecosystems by 0.6 +/- 0.4 petagrams of carbon per year, and an underestimation of sedimentary and oceanic carbon storage. We identify knowledge gaps that are key to reduce uncertainties in future assessments of LOAC fluxes. An assessment of the land-to-ocean cycling of carbon through inland waters, estuaries, tidal wetlands and continental shelf waters provides a perspective on the global carbon cycle and identifies key knowledge gaps.
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000769827000001
来源期刊	NATURE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/280646
作者单位	Universite Libre de Bruxelles; Princeton University; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park
推荐引用方式 GB/T 7714	Regnier, Pierre,Resplandy, Laure,Najjar, Raymond G.,et al. The land-to-ocean loops of the global carbon cycle[J],2022,603(7901).
APA	Regnier, Pierre,Resplandy, Laure,Najjar, Raymond G.,&Ciais, Philippe.(2022).The land-to-ocean loops of the global carbon cycle.NATURE,603(7901).
MLA	Regnier, Pierre,et al."The land-to-ocean loops of the global carbon cycle".NATURE 603.7901(2022).