气候变化领域集成服务门户(CCPortal): Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay

CCPortal

DOI	10.5194/cp-20-121-2024
	Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay
	Alves, Eduardo Queiroz; Wong, Wanyee; Hefter, Jens; Grotheer, Hendrik; Tesi, Tommaso; Gentz, Torben; Zonneveld, Karin; Mollenhauer, Gesine
发表日期	2024
ISSN	1814-9324
EISSN	1814-9332
起始页码	20
结束页码	1
卷号	20 期号:1
英文摘要	The last deglaciation is the most recent relatively well-documented period of pronounced and fast climate warming, and, as such, it holds important information for our understanding of the climate system. Notably, while research into terrestrial organic carbon reservoirs has been instrumental in exploring the possible sources of atmospheric carbon dioxide during periods of rapid change, the underlying mechanisms are not fully understood. Here we investigate the mobilization of organic matter to the Bay of Biscay, located in the north-eastern Atlantic Ocean off the coasts of France and Spain. Specifically, we focus on the area that was the mouth of the Channel River during the last deglaciation, where an enhanced terrigenous input has been reported for the last glacial-interglacial transition. We conducted a comprehensive suite of biomarker analyses (e.g. n-alkanes, hopanes and n-alkanoic acids) and isotopic investigations (radiocarbon dating and delta 13 C measurements) on a high-resolution sedimentary archive. The present study provides the first direct evidence for the fluvial supply of immature and ancient terrestrial organic matter to the core location. Moreover, our results reveal the possibility of permafrost carbon export to the ocean, driven by processes such as deglacial warming and glacial erosion. These findings are consistent with observations from other regions characterized by present or past permafrost conditions on land, which have shown that permafrost thaw and glacial erosion can lead to carbon remobilization, potentially influencing atmospheric carbon dioxide levels.
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001168885500001
来源期刊	CLIMATE OF THE PAST
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298690
作者单位	Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; University of Bremen; Consiglio Nazionale delle Ricerche (CNR); Istituto di Scienze Polari (ISP-CNR); University of Bremen; Universidade Federal Fluminense; Norwegian Research Centre (NORCE); Bjerknes Centre for Climate Research
推荐引用方式 GB/T 7714	Alves, Eduardo Queiroz,Wong, Wanyee,Hefter, Jens,et al. Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay[J],2024,20(1).
APA	Alves, Eduardo Queiroz.,Wong, Wanyee.,Hefter, Jens.,Grotheer, Hendrik.,Tesi, Tommaso.,...&Mollenhauer, Gesine.(2024).Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay.CLIMATE OF THE PAST,20(1).
MLA	Alves, Eduardo Queiroz,et al."Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay".CLIMATE OF THE PAST 20.1(2024).