globalchange  > 气候变化事实与影响
DOI: 10.1002/2016GB005586
Scopus记录号: 2-s2.0-85012081835
论文题名:
A reevaluation of the magnitude and impacts of anthropogenic atmospheric nitrogen inputs on the ocean
作者: Jickells T; D; , Buitenhuis E; , Altieri K; , Baker A; R; , Capone D; , Duce R; A; , Dentener F; , Fennel K; , Kanakidou M; , LaRoche J; , Lee K; , Liss P; , Middelburg J; J; , Moore J; K; , Okin G; , Oschlies A; , Sarin M; , Seitzinger S; , Sharples J; , Singh A; , Suntharalingam P; , Uematsu M; , Zamora L; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期:2
起始页码: 289
结束页码: 305
语种: 英语
英文关键词: atmospheric deposition ; nitrogen ; ocean
Scopus关键词: ammonia ; anthropogenic effect ; atmospheric deposition ; biogeochemical cycle ; biogeochemistry ; carbon dioxide ; carbon sequestration ; climate change ; continental shelf ; nitrogen fixation ; open ocean ; organic nitrogen ; surface water
英文摘要: We report a new synthesis of best estimates of the inputs of fixed nitrogen to the world ocean via atmospheric deposition and compare this to fluvial inputs and dinitrogen fixation. We evaluate the scale of human perturbation of these fluxes. Fluvial inputs dominate inputs to the continental shelf, and we estimate that about 75% of this fluvial nitrogen escapes from the shelf to the open ocean. Biological dinitrogen fixation is the main external source of nitrogen to the open ocean, i.e., beyond the continental shelf. Atmospheric deposition is the primary mechanism by which land-based nitrogen inputs, and hence human perturbations of the nitrogen cycle, reach the open ocean. We estimate that anthropogenic inputs are currently leading to an increase in overall ocean carbon sequestration of ~0.4% (equivalent to an uptake of 0.15 Pg C yr−1 and less than the Duce et al. (2008) estimate). The resulting reduction in climate change forcing from this ocean CO2 uptake is offset to a small extent by an increase in ocean N2O emissions. We identify four important feedbacks in the ocean atmosphere nitrogen system that need to be better quantified to improve our understanding of the perturbation of ocean biogeochemistry by atmospheric nitrogen inputs. These feedbacks are recycling of (1) ammonia and (2) organic nitrogen from the ocean to the atmosphere and back, (3) the suppression of nitrogen fixation by increased nitrogen concentrations in surface waters from atmospheric deposition, and (4) increased loss of nitrogen from the ocean by denitrification due to increased productivity stimulated by atmospheric inputs. ©2017. 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/77767
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: School of Environmental Science, University of East Anglia, Norwich, United Kingdom; Energy Research Centre, University of Cape Town, Cape Town, South Africa; Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States; Departments of Oceanography and Atmospheric Sciences, Texas A&M University, College Station, TX, United States; DG Joint Research Centre, European Commission, Ispra, Italy; Department of Oceanography, Dalhousie University, Halifax, NS, Canada; Department of Chemistry, University of Crete, Heraklion, Greece; Department of Biology, Dalhousie University, Halifax, NS, Canada; School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, South Korea; Faculty of Geosciences, University of Utrecht, Utrecht, Netherlands; Department of Earth System Science, University of California, Irvine, CA, United States; Department of Geography, University of California, Los Angeles, CA, United States; GEOMAR, Kiel, Germany; Geosciences Division, Physical Research Laboratory, Ahmedabad, India; Department of Environmental Studies, University of Victoria, Victoria, BC, Canada; School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; Center for International Collaboration, Atmosphere and Ocean Research Institute, University of Tokyo, Tokyo, Japan; NASA Goddard Space Flight Centre, Greenbelt, MD, United States; Universities Space Research Association, Greenbelt, MD, United States

Recommended Citation:
Jickells T,D,, Buitenhuis E,et al. A reevaluation of the magnitude and impacts of anthropogenic atmospheric nitrogen inputs on the ocean[J]. Global Biogeochemical Cycles,2017-01-01,31(2)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Jickells T]'s Articles
[D]'s Articles
[, Buitenhuis E]'s Articles
百度学术
Similar articles in Baidu Scholar
[Jickells T]'s Articles
[D]'s Articles
[, Buitenhuis E]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Jickells T]‘s Articles
[D]‘s Articles
[, Buitenhuis E]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.