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    Past, Present, and Future Atmospheric Nitrogen Deposition

    Source: Journal of the Atmospheric Sciences:;2016:;Volume( 073 ):;issue: 005::page 2039
    Author:
    Kanakidou, M.
    ,
    Myriokefalitakis, S.
    ,
    Daskalakis, N.
    ,
    Fanourgakis, G.
    ,
    Nenes, A.
    ,
    Baker, A. R.
    ,
    Tsigaridis, K.
    ,
    Mihalopoulos, N.
    DOI: 10.1175/JAS-D-15-0278.1
    Publisher: American Meteorological Society
    Abstract: eactive nitrogen emissions into the atmosphere are increasing as a result of human activities, affecting nitrogen deposition to the surface and impacting the productivity of terrestrial and marine ecosystems. An atmospheric chemistry?transport model [Tracer Model 4 of the Environmental Chemical Processes Laboratory (TM4-ECPL)] is here used to calculate the global distribution of total nitrogen deposition, accounting for the first time for both its inorganic and organic fractions in gaseous and particulate phases and past and projected changes due to anthropogenic activities. The anthropogenic and biomass-burning Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) historical and RCP6.0 and RCP8.5 emissions scenarios are used. Accounting for organic nitrogen (ON) primary emissions, the present-day global nitrogen atmospheric source is about 60% anthropogenic, while total N deposition increases by about 20% relative to simulations without ON primary emissions. About 20%?25% of total deposited N is ON. About 10% of the emitted nitrogen oxides are deposited as ON instead of inorganic nitrogen (IN), as is considered in most global models. Almost a threefold increase over land (twofold over the ocean) has been calculated for soluble N deposition due to human activities from 1850 to present. The investigated projections indicate significant changes in the regional distribution of N deposition and chemical composition, with reduced compounds gaining importance relative to oxidized ones, but very small changes in the global total flux. Sensitivity simulations quantify uncertainties due to the investigated model parameterizations of IN partitioning onto aerosols and of N chemically fixed on organics to be within 10% for the total soluble N deposition and between 25% and 35% for the dissolved ON deposition. Larger uncertainties are associated with N emissions.
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      Past, Present, and Future Atmospheric Nitrogen Deposition

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4220027
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    contributor authorKanakidou, M.
    contributor authorMyriokefalitakis, S.
    contributor authorDaskalakis, N.
    contributor authorFanourgakis, G.
    contributor authorNenes, A.
    contributor authorBaker, A. R.
    contributor authorTsigaridis, K.
    contributor authorMihalopoulos, N.
    date accessioned2017-06-09T16:59:11Z
    date available2017-06-09T16:59:11Z
    date copyright2016/05/01
    date issued2016
    identifier issn0022-4928
    identifier otherams-77466.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4220027
    description abstracteactive nitrogen emissions into the atmosphere are increasing as a result of human activities, affecting nitrogen deposition to the surface and impacting the productivity of terrestrial and marine ecosystems. An atmospheric chemistry?transport model [Tracer Model 4 of the Environmental Chemical Processes Laboratory (TM4-ECPL)] is here used to calculate the global distribution of total nitrogen deposition, accounting for the first time for both its inorganic and organic fractions in gaseous and particulate phases and past and projected changes due to anthropogenic activities. The anthropogenic and biomass-burning Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) historical and RCP6.0 and RCP8.5 emissions scenarios are used. Accounting for organic nitrogen (ON) primary emissions, the present-day global nitrogen atmospheric source is about 60% anthropogenic, while total N deposition increases by about 20% relative to simulations without ON primary emissions. About 20%?25% of total deposited N is ON. About 10% of the emitted nitrogen oxides are deposited as ON instead of inorganic nitrogen (IN), as is considered in most global models. Almost a threefold increase over land (twofold over the ocean) has been calculated for soluble N deposition due to human activities from 1850 to present. The investigated projections indicate significant changes in the regional distribution of N deposition and chemical composition, with reduced compounds gaining importance relative to oxidized ones, but very small changes in the global total flux. Sensitivity simulations quantify uncertainties due to the investigated model parameterizations of IN partitioning onto aerosols and of N chemically fixed on organics to be within 10% for the total soluble N deposition and between 25% and 35% for the dissolved ON deposition. Larger uncertainties are associated with N emissions.
    publisherAmerican Meteorological Society
    titlePast, Present, and Future Atmospheric Nitrogen Deposition
    typeJournal Paper
    journal volume73
    journal issue5
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/JAS-D-15-0278.1
    journal fristpage2039
    journal lastpage2047
    treeJournal of the Atmospheric Sciences:;2016:;Volume( 073 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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