DOI: 10.1002/2015GB005320
Scopus记录号: 2-s2.0-84970024597
论文题名: A novel molecular approach for tracing terrigenous dissolved organic matter into the deep ocean
作者: Medeiros P ; M ; , Seidel M ; , Niggemann J ; , Spencer R ; G ; M ; , Hernes P ; J ; , Yager P ; L ; , Miller W ; L ; , Dittmar T ; , Hansell D ; A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 5 起始页码: 689
结束页码: 699
语种: 英语
英文关键词: deep North Atlantic Ocean
; deep North Pacific Ocean
; dissolved organic matter
; FT-ICR MS
; meridional overturning circulation
; terrigenous DOM
Scopus关键词: dissolved organic matter
; Fourier transform
; land-sea interaction
; mass spectrometry
; meridional circulation
; ocean basin
; terrigenous deposit
; vegetation cover
; Amazon River
; Atlantic Ocean
; Atlantic Ocean (North)
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Marine dissolved organic matter (DOM) contains one of the largest exchangeable organic carbon pools on Earth. Riverine input represents an important source of DOM to the oceans, yet much remains to be learned about the fate of the DOM linking terrestrial to oceanic carbon cycles through rivers at the global scale. Here we use ultrahigh-resolution mass spectrometry to identify 184 molecular formulae that are indicators of riverine inputs (referred to as t-Peaks) and to track their distribution in the deep North Atlantic and North Pacific Oceans. The t-Peaks were found to be enriched in the Amazon River, to be highly correlated with known tracers of terrigenous input, and to be observed in all samples from four different rivers characterized by vastly different landscapes and vegetation coverage spanning equatorial (Amazon and Congo), subtropical (Altamaha), and Arctic (Kolyma) regions. Their distribution reveals that terrigenous organic matter is injected into the deep ocean by the global meridional overturning circulation, indicating that a fraction of the terrigenous DOM introduced by rivers contributes to the DOM pool observed in the deep ocean and to the storage of terrigenous organic carbon. This novel molecular approach can be used to further constrain the transfer of DOM from land to sea, especially considering that Fourier transform ion cyclotron resonance mass spectrometer analysis is becoming increasingly frequent in studies characterizing the molecular composition of DOM in lakes, rivers, and the ocean. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77857
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Marine Sciences, University of Georgia, Athens, GA, United States; Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), University of Oldenburg, Oldenburg, Germany; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Department of Land, Air, and Water Resources, University of California, Davis, CA, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
Recommended Citation:
Medeiros P,M,, Seidel M,et al. A novel molecular approach for tracing terrigenous dissolved organic matter into the deep ocean[J]. Global Biogeochemical Cycles,2016-01-01,30(5)