DOI: 10.1038/ngeo2631
论文题名: Elevated surface chlorophyll associated with natural oil seeps in the Gulf of Mexico
作者: D'Souza N.A. ; Subramaniam A. ; Juhl A.R. ; Hafez M. ; Chekalyuk A. ; Phan S. ; Yan B. ; MacDonald I.R. ; Weber S.C. ; Montoya J.P.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期: 3 起始页码: 215
结束页码: 218
语种: 英语
Scopus关键词: biogeochemistry
; chlorophyll
; concentration (composition)
; continental margin
; deep sea
; fluorescence
; hydrocarbon
; oil seep
; phytoplankton
; satellite imagery
; spatial resolution
; water column
; Atlantic Ocean
; Gulf of Mexico
英文摘要: Natural hydrocarbon seeps occur on the sea floor along continental margins, and account for up to 47% of the oil released into the oceans. Hydrocarbon seeps are known to support local benthic productivity, but little is known about their impact on photosynthetic organisms in the overlying water column. Here we present observations with high temporal and spatial resolution of chlorophyll concentrations in the northern Gulf of Mexico using in situ and shipboard flow-through fluorescence measurements from May to July 2012, as well as an analysis of ocean-colour satellite images from 1997 to 2007. All three methods reveal elevated chlorophyll concentrations in waters influenced by natural hydrocarbon seeps. Temperature and nutrient profiles above seep sites suggest that nutrient-rich water upwells from depth, which may facilitate phytoplankton growth and thus support the higher chlorophyll concentrations observed. Because upwelling occurs at natural seep locations around the world, we conclude that offshore hydrocarbon seeps, and perhaps other types of deep ocean vents and seeps at depths exceeding 1,000 m, may influence biogeochemistry and productivity of the overlying water column. © 2016 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106064
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; School of Biology, Georgia Institute of Technology, Atlanta, GA, United States; Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States
Recommended Citation:
D'Souza N.A.,Subramaniam A.,Juhl A.R.,et al. Elevated surface chlorophyll associated with natural oil seeps in the Gulf of Mexico[J]. Nature Geoscience,2016-01-01,9(3)