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Environ Pollut ; 150(1): 125-39, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17604887

RESUMO

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 N(2) 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 N(2)O, NO and bi-directional NH(3) 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.


Assuntos
Poluentes Atmosféricos/química , Efeito Estufa , Modelos Químicos , Compostos de Nitrogênio/química , Poluentes Atmosféricos/análise , Atmosfera , Ecossistema , Monitoramento Ambiental/métodos , Europa (Continente) , Compostos de Nitrogênio/análise
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