DOI: 10.1002/2014GL062663
论文题名: Dissolved organic matter composition and photochemical transformations in the northern North Pacific Ocean
作者: Medeiros P.M. ; Seidel M. ; Powers L.C. ; Dittmar T. ; Hansell D.A. ; Miller W.L.
刊名: Geophysical Research Letters
ISSN: 0094-8980
EISSN: 1944-8711
出版年: 2015
卷: 42, 期: 3 起始页码: 863
结束页码: 870
语种: 英语
英文关键词: dissolved organic matter
; FT-ICR MS
; molecular composition
; North Pacific Ocean
; photochemistry
Scopus关键词: Biogeochemistry
; Biological materials
; Chemical reactions
; Dissolution
; Drug products
; Mass spectrometry
; Organic compounds
; Photochemical reactions
; Unsaturated compounds
; Dissolved organic matters
; FT-ICR MS
; Molecular compositions
; North Pacific Ocean
; Photochemical transformations
; Photodegradation products
; Polycyclic aromatics
; Ultrahigh resolution mass spectrometries
; Oceanography
; dissolved organic matter
; FTIR spectroscopy
; inductively coupled plasma method
; photic zone
; photochemistry
; photodegradation
; transformation
; vertical profile
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The composition and photochemical transformations of dissolved organic matter (DOM) in the northern North Pacific Ocean were investigated at the molecular level using ultrahigh resolution mass spectrometry and geochemical tracers. Analyses included vertical profiles and experiments in which deep sea DOM was exposed to sunlight and incubated in the dark. The composition of the deep sea DOM was found to be approximately uniform and enriched with highly unsaturated compounds, with highly aromatic compounds, and with polycyclic aromatics. Surface DOM had a significantly different composition, being enriched with both highly unsaturated and with unsaturated aliphatic compounds potentially due to the addition of photodegradation products and phytoplankton inputs. Deep sea DOM composition is transformed by photoreactions, becoming more similar to surface DOM. The influence of photochemistry extends beyond the photic zone, presumably because of vertical export of DOM previously modified at the surface. © 2015 The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925052011&doi=10.1002%2f2014GL062663&partnerID=40&md5=d30ff0067beb59e40a8837ab6a0787e7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8596
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Marine Sciences, University of Georgia, Athens, GA, United States
Recommended Citation:
Medeiros P.M.,Seidel M.,Powers L.C.,et al. Dissolved organic matter composition and photochemical transformations in the northern North Pacific Ocean[J]. Geophysical Research Letters,2015-01-01,42(3).