DOI: 10.1002/2016GL068871
论文题名: Expansion of denitrification and anoxia in the eastern tropical North Pacific from 1972 to 2012
作者: Horak R.E.A. ; Ruef W. ; Ward B.B. ; Devol A.H.
刊名: Geophysical Research Letters
ISSN: 0094-9653
EISSN: 1944-9384
出版年: 2016
卷: 43, 期: 10 起始页码: 5252
结束页码: 5260
语种: 英语
英文关键词: anoxia
; denitrification
; deoxygenation
; nitrogen cycle
; oxygen-deficient zone
Scopus关键词: Oxygen
; Oxygen supply
; Anoxia
; Deoxygenations
; Long term study
; Low oxygen conditions
; Nitrogen cycles
; Oxygen deficient
; Pacific decadal oscillation
; Wind driven upwelling
; Denitrification
; anoxic conditions
; chemical analysis
; denitrification
; isopycnal layer
; nitrogen cycle
; oxygenation
; transect
; upwelling
; water chemistry
; water column
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (Tropical)
英文摘要: The eastern tropical North Pacific (ETNP) is a large region of anoxic water that hosts widespread water column N loss (denitrification). There is some disagreement about the long-term trends of denitrification and anoxia and long-term studies of water column denitrification within the anoxic zone are lacking. In this study, we compared ETNP water column nitrite, N*, and O2 data along the same transect for four studies ranging from 1972 to 2012. Anoxic water volume increased, and low-oxygen conditions expanded into shallower isopycnals from 1972 to 2012. A geochemical marker for cumulative N loss indicates that denitrification was highest in 2012 and the upper oxygen-deficient zone (ODZ) experienced the most change. Oxygen and N loss changes in the world's largest ODZ for 2012 could not be explained by the Pacific Decadal Oscillation, and decreased O2 in supply currents and increased wind-driven upwelling are likely mechanisms contributing to increased N loss and anoxia. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971254750&doi=10.1002%2f2016GL068871&partnerID=40&md5=06056fa8ba412d06406e3e53b860f211
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10616
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: School of Oceanography, University of Washington, Seattle, WA, United States
Recommended Citation:
Horak R.E.A.,Ruef W.,Ward B.B.,et al. Expansion of denitrification and anoxia in the eastern tropical North Pacific from 1972 to 2012[J]. Geophysical Research Letters,2016-01-01,43(10).