DOI: 10.1002/2015GL066853
论文题名: Nitrous oxide production by nitrification and denitrification in the Eastern Tropical South Pacific oxygen minimum zone
作者: Ji Q. ; Babbin A.R. ; Jayakumar A. ; Oleynik S. ; Ward B.B.
刊名: Geophysical Research Letters
ISSN: 0094-8286
EISSN: 1944-8017
出版年: 2015
卷: 42, 期: 24 起始页码: 10755
结束页码: 10764
语种: 英语
英文关键词: denitrification
; nitrification
; nitrous oxide
; oxygen
; oxygen minimum zone
Scopus关键词: Nitrification
; Nitrogen oxides
; Oxygen
; Dominant pathways
; Nitrate reduction
; Nitrification and denitrification
; Nitrite reductase
; Nitrous oxide
; Nitrous oxide production
; Oxygen minimum zone
; Production rates
; Denitrification
; air-sea interaction
; anoxic conditions
; denitrification
; enzyme activity
; flux measurement
; nitrite
; nitrogen isotope
; nitrous oxide
; oxygen minimum layer
; oxygenation
; tracer
; Pacific Ocean
; Pacific Ocean (South)
英文摘要: The Eastern Tropical South Pacific oxygen minimum zone (ETSP-OMZ) is a site of intense nitrous oxide (N2O) flux to the atmosphere. This flux results from production of N2O by nitrification and denitrification, but the contribution of the two processes is unknown. The rates of these pathways and their distributions were measured directly using 15N tracers. The highest N2O production rates occurred at the depth of peak N2O concentrations at the oxic-anoxic interface above the oxygen deficient zone (ODZ) because slightly oxygenated waters allowed (1) N2O production from both nitrification and denitrification and (2) higher nitrous oxide production yields from nitrification. Within the ODZ proper (i.e., anoxia), the only source of N2O was denitrification (i.e., nitrite and nitrate reduction), the rates of which were reflected in the abundance of nirS genes (encoding nitrite reductase). Overall, denitrification was the dominant pathway contributing the N2O production in the ETSP-OMZ. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955214869&doi=10.1002%2f2015GL066853&partnerID=40&md5=b7fc01b840692b5fec9a58e874e5ed61
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7902
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 Geosciences, Guyot Hall, Princeton University, Princeton, NJ, United States
Recommended Citation:
Ji Q.,Babbin A.R.,Jayakumar A.,et al. Nitrous oxide production by nitrification and denitrification in the Eastern Tropical South Pacific oxygen minimum zone[J]. Geophysical Research Letters,2015-01-01,42(24).