Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico

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	Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico
	Yang, Weifeng ; Guo, Laodong ; Yang WF(杨伟锋) ; Guo LD(郭劳动)
刊名	http://dx.doi.org/10.1002/2014GL061912
	2014
关键词	Budget control Carbon Isotopes Population distribution Soot
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
语种	英语
出版者	Blackwell Publishing Ltd
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88233]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Yang, Weifeng,Guo, Laodong,Yang WF,et al. Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico[J]. http://dx.doi.org/10.1002/2014GL061912,2014.
APA	Yang, Weifeng,Guo, Laodong,杨伟锋,&郭劳动.(2014).Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico.http://dx.doi.org/10.1002/2014GL061912.
MLA	Yang, Weifeng,et al."Abundance, distribution, and isotopic composition of particulate black carbon in the northern Gulf of Mexico".http://dx.doi.org/10.1002/2014GL061912 (2014).