干旱区生态环境知识资源中心(Arid): Global-scale daily riverine DOC fluxes from lands to the oceans with a generic model

Arid

DOI	10.1016/j.gloplacha.2020.103294
	Global-scale daily riverine DOC fluxes from lands to the oceans with a generic model
	Fabre, C.; Sauvage, S.; Probst, J-L; Sanchez-Perez, J. M.
通讯作者	Fabre, C ; Sanchez-Perez, JM
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2020
卷号	194
英文摘要	The export of riverine dissolved organic carbon (DOC) to the oceans is determinant in carbon exchanges of the estuaries and oceanic food webs. Past research returned a global DOC export around 160-450 TgC.yr(-1) by using complex process-based models or yearly average estimates that could have been misjudged. In this study, we try to understand the complex processes explaining daily DOC exports among 341 exoreic watersheds covering 71% of freshwater flows to the oceans. Based on a dataset of DOC concentrations among rivers at the global scale, we were able to link DOC concentrations to daily discharge, the ration between the soil organic carbon content and the amount of precipitations and the average air temperature in the watersheds. We have found a global riverine DOC flux of 131.6 TgC.yr(-1) based on daily data and a generic model. Tropical and cold watersheds are the main contributors with 49.5% and 33.3% of the global riverine DOC flux on the two last decades while temperate, semi-arid and polar basins represent 15.9%, 0.7% and 0.6%, respectively. Temporal exports range from 0.1 to 0.16 TgC.day(-1) in tropical areas, 0.03-0.32 TgC.day(-1) in cold areas and 0.03-0.08 TgC.day(-1) in temperate areas. Atlantic and Arctic oceans receive the most important fluxes (0.12-0.2 and 0.01-0.26 TgC.day(-1)). In a climate change context, this generic equation could be introduced in hydrological modelling tools to predict future DOC fluxes trends.
英文关键词	DOC Global scale Generic model Daily Riverine exports
类型	Article
语种	英语
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000579858500007
WOS关键词	DISSOLVED ORGANIC-CARBON ; LARGE TROPICAL RIVER ; TEMPORAL VARIATION ; MEDITERRANEAN SEA ; TRANSPORT ; MATTER ; SOIL ; WATER ; NITROGEN ; DATABASE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326907
作者单位	[Fabre, C.; Sauvage, S.; Probst, J-L; Sanchez-Perez, J. M.] Univ Toulouse, Lab Ecol Fonct & Environm, UPS, CNRS,INPT, Toulouse, France
推荐引用方式 GB/T 7714	Fabre, C.,Sauvage, S.,Probst, J-L,et al. Global-scale daily riverine DOC fluxes from lands to the oceans with a generic model[J],2020,194.
APA	Fabre, C.,Sauvage, S.,Probst, J-L,&Sanchez-Perez, J. M..(2020).Global-scale daily riverine DOC fluxes from lands to the oceans with a generic model.GLOBAL AND PLANETARY CHANGE,194.
MLA	Fabre, C.,et al."Global-scale daily riverine DOC fluxes from lands to the oceans with a generic model".GLOBAL AND PLANETARY CHANGE 194(2020).