DOI: 10.1002/2016GL068335
论文题名: Limited impact of atmospheric nitrogen deposition on marine productivity due to biogeochemical feedbacks in a global ocean model
作者: Somes C.J. ; Landolfi A. ; Koeve W. ; Oschlies A.
刊名: Geophysical Research Letters
ISSN: 0094-9039
EISSN: 1944-8770
出版年: 2016
卷: 43, 期: 9 起始页码: 4500
结束页码: 4509
语种: 英语
英文关键词: atmospheric nitrogen deposition
; denitrification
; marine productivity
; N2 fixation
Scopus关键词: Biogeochemistry
; Denitrification
; Feedback
; Meteorological problems
; Nitrogen
; Productivity
; Atmospheric depositions
; Atmospheric nitrogen deposition
; Global ocean model
; Marine biogeochemistries
; Marine nitrogen cycle
; Marine productivity
; Nitrogen deposition
; Ocean biogeochemistry models
; Nitrogen fixation
英文摘要: The impact of increasing anthropogenic atmospheric nitrogen deposition on marine biogeochemistry is uncertain. We performed simulations to quantify its effect on nitrogen cycling and marine productivity in a global 3-D ocean biogeochemistry model. Nitrogen fixation provides an efficient feedback by decreasing immediately to deposition, whereas water column denitrification increases more gradually in the slowly expanding oxygen deficient zones. Counterintuitively, nitrogen deposition near oxygen deficient zones causes a net loss of marine nitrogen due to the stoichiometry of denitrification. In our idealized atmospheric deposition simulations that only account for nitrogen cycle perturbations, these combined stabilizing feedbacks largely compensate deposition and suppress the increase in global marine productivity to <2%, in contrast to a simulation that neglects nitrogen cycle feedbacks that predicts an increase of >15%. Our study emphasizes including the dynamic response of nitrogen fixation and denitrification to atmospheric nitrogen deposition to predict future changes of the marine nitrogen cycle and productivity. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970005848&doi=10.1002%2f2016GL068335&partnerID=40&md5=644362e495ca3c606663dd79e3871d79
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10002
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Somes C.J.,Landolfi A.,Koeve W.,et al. Limited impact of atmospheric nitrogen deposition on marine productivity due to biogeochemical feedbacks in a global ocean model[J]. Geophysical Research Letters,2016-01-01,43(9).