DOI: 10.1002/2014GB004977
Scopus记录号: 2-s2.0-84939254869
论文题名: Origin and fluxes of nitrous oxide along a latitudinal transect in western North Pacific: Controls and regional significance
作者: Breider F ; , Yoshikawa C ; , Abe H ; , Toyoda S ; , Yoshida N
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 7 起始页码: 1014
结束页码: 1027
语种: 英语
英文关键词: flux
; isotope
; isotopomer
; nitrification
; nitrous oxide
; ocean
Scopus关键词: denitrification
; emission inventory
; flux measurement
; gyre
; isotopic analysis
; latitudinal gradient
; microbial activity
; nitrous oxide
; nutrient enrichment
; oligotrophic environment
; ozone
; radiative forcing
; solar radiation
; stratosphere
; subarctic region
; subtropical region
; trace gas
; transect
; water column
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Nitrous oxide (N2 O) is an atmospheric trace gas playing an important role in both radiative forcing and stratospheric ozone depletion. The oceans are the second most important natural source of N2 O. The magnitude of the flux of this source is poorly constrained. Moreover, the relative importance of the microbial processes leading to the formation or the consumption of N2 O in oceans remains unclear. We present here fluxes and isotope and isotopomer signatures of N2 O measured at three stations located along a latitudinal transect in subtropical and subarctic western North Pacific. These results indicate that about 30% to 55% of the oceanic flux of N2 O to the atmosphere originates from the deep euphotic and shallow aphotic zones. The sea-to-air fluxes of N2 O calculated using an isotope mass balance model indicate that the emission rate of N2 O in subarctic waters is about 2 times higher than in oligotrophic subtropical waters suggesting that nutrient-rich water coming from the western subarctic gyre stimulates the N2 O production. Moreover, isotopomer analysis has revealed that in shallow water N2 O originates from nitrification and nitrifier denitrification processes, and its distribution in the water column is partly controlled by the incident solar radiation. The results of this study contribute to better constrain the global N2 O budget and provide important information to better predict the future evolution of the oceanic emissions of N2 O. ©2015. 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/77961
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, Yokohama, Japan; Department of Biogeochemistry, Japan Agency of Marine Earth Science and Technology, Yokosuka, Japan; Department of Environmental Science and Technology, Tokyo Institute of Technology, Yokohama, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro, Japan
Recommended Citation:
Breider F,, Yoshikawa C,, Abe H,et al. Origin and fluxes of nitrous oxide along a latitudinal transect in western North Pacific: Controls and regional significance[J]. Global Biogeochemical Cycles,2015-01-01,29(7)