Recent research in nitrogen exchange with the atmosphere has separated research communities according to N form. The integrated perspective needed to quantify the net effect of N on greenhouse-gas balance is being addressed by the NitroEurope Integrated Project (NEU). Recent advances have depended on improved methodologies, while ongoing challenges include gas-aerosol interactions, organic nitrogen and N2 fluxes. The NEU strategy applies a 3-tier Flux Network together with a Manipulation Network of global-change experiments, linked by common protocols to facilitate model application. Substantial progress has been made in modelling N fluxes, especially for N2O, NO and bi-directional NH3 exchange. Landscape analysis represents an emerging challenge to address the spatial interactions between farms, fields, ecosystems, catchments and air dispersion/deposition. European up-scaling of N fluxes is highly uncertain and a key priority is for better data on agricultural practices. Finally, attention is needed to develop N flux verification procedures to assess compliance with international protocols.
SUTTON M.A.;
NEMITZ E.;
ERISMAN J.W.;
BEIER C.;
BUTTERBACH BAHL K.;
CELLIER P.;
DE VRIES W.;
COTRUFO F.;
SKIBA U.;
DI MARCO C.;
JONES S.;
LAVILLE P.;
SOUSSANA J.F.;
LOUBET B.;
TWIGG M.;
FAMULARI D.;
WHITEHEAD J.;
GALLAGHER M.W.;
NEFTEL A.;
FLECHARD C.R.;
HERRMANN B.;
CALANCA P.L.;
SCHJOERRING J.K.;
DAEMMGEN U.;
HORVATH L.;
TANG Y.S.;
EMMETT B.A.;
TIETEMA A.;
PENUELAS J.;
KESIK M.;
BRUEGGEMANN N.;
PILEGAARD K.;
VESALA T.;
CAMPBELL C.L.;
OLESEN J.E.;
DRAGOSITS U.;
THEOBALD M.R.;
LEVY P.;
MOBBS D.C.;
MILNE R.;
VIOVY N.;
VUICHARD N.;
SMITH J.U.;
SMITH P.;
BERGAMASCHI Peter;
FOWLER D.;
REIS S.;
2007-11-28
ELSEVIER SCI LTD
JRC41723
0269-7491,
www.elsevier.com/locate/envpol,
https://publications.jrc.ec.europa.eu/repository/handle/JRC41723,
10.1016/j.envpol.2007.04.014,
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