DOI: 10.1002/2014GL061912
论文题名: Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico
作者: Yang W. ; Guo L.
刊名: Geophysical Research Letters
ISSN: 0094-9638
EISSN: 1944-9369
出版年: 2014
卷: 41, 期: 21 起始页码: 7619
结束页码: 7625
语种: 英语
英文关键词: black carbon
; Gulf of Mexico
; Mississippi River
; POC
; δ13C
Scopus关键词: Budget control
; Carbon
; Isotopes
; Population distribution
; Soot
; Black carbon
; Geochemical behaviors
; Gulf of Mexico
; Isotopic composition
; Mississippi river
; Northern Gulf of Mexico
; Particulate organic carbon
; POC
; Organic carbon
; allochthon
; black carbon
; isotopic composition
; marine environment
; reaction kinetics
; soot
; Atlantic Ocean
; Gulf of Mexico
英文摘要: There exists increasing evidence supporting the important role of black carbon in global carbon cycles. Particulate black carbon (PBC) is allochthonous and has distinct reactivities compared to the bulk particulate organic carbon (tot-POC) in marine environments. However, the abundance, geochemical behavior of PBC and its importance in oceanic carbon budget remain poorly understood. Here we report the abundance, distribution, and stable isotopic signatures of BC derived from the chemo-thermal oxidation (CTO-375) method (BCCTO ) in the Gulf of Mexico. Our results show that BCCTO abundance decreased from shelf to basin, and more than a half of riverine BCCTO could be removed over the shelf. Moreover, BCCTO is much more refractory compared to the tot-POC and has δ13C values lower than those of BC-excluded POC. These results highlight the significance of PBC in marine carbon cycles and potentially suggest the need for a new end-member term in quantifying POC sources in the ocean. Key Points BC could result in an overestimate of autochthonous POC in the ocean13C abundance of soot BC is up to 12‰ lower than BC-excluded POC>50% of the riverine soot BC is removed on the shelf ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912116200&doi=10.1002%2f2014GL061912&partnerID=40&md5=978df80436cb000b47b5697a83ed9a45
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6902
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
Recommended Citation:
Yang W.,Guo L.. Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico[J]. Geophysical Research Letters,2014-01-01,41(21).