Publication Abstracts

Dentener et al. 2006

Dentener, F., J. Drevet, J.F. Lamarque, I. Bey, B. Eickhout, A.M. Fiore, D. Hauglustaine, L.W. Horowitz, M. Krol, U.C. Kulshrestha, M. Lawrence, C. Galy-Lacaux, S. Rast, D. Shindell, D. Stevenson, T. Van Noije, C. Atherton, N. Bell, D. Bergman, T. Butler, J. Cofala, B. Collins, R. Doherty, K. Ellingsen, J. Galloway, M. Gauss, V. Montanaro, J.F. Müller, G. Pitari, J. Rodriguez, M. Sanderson, F. Solmon, S. Strahan, M. Schultz, K. Sudo, S. Szopa, and O. Wild, 2006: Nitrogen and sulfur deposition on regional and global scales: A multimodel evaluation. Glob. Biogeochem. Cycles, 20, GB4003, doi:10.1029/2005GB002672.

We use 23 atmospheric chemistry transport models to calculate current and future (2030) deposition of reactive nitrogen (NOy, NHx) and sulfate (SOx) to land and ocean surfaces. The models are driven by three emission scenarios: (1) current air quality legislation (CLE); (2) an optimistic case of the maximum emissions reductions currently technologically feasible (MFR); and (3) the contrasting pessimistic IPCC SRES A2 scenario. An extensive evaluation of the present-day deposition using nearly all information on wet deposition available worldwide shows a good agreement with observations in Europe and North America, where 60-70% of the model-calculated wet deposition rates agree to within ±50% with quality-controlled measurements. Models systematically overestimate NHx deposition in South Asia, and underestimate NOy deposition in East Asia. We show that there are substantial differences among models for the removal mechanisms of NOy, NHx, and SOx, leading to ±1 σ variance in total deposition fluxes of about 30% in the anthropogenic emissions regions, and up to a factor of 2 outside. In all cases the mean model constructed from the ensemble calculations is among the best when comparing to measurements. Currently, 36-51% of all NOy, NHx, and SOx is deposited over the ocean, and 50-80% of the fraction of deposition on land falls on natural (nonagricultural) vegetation. Currently, 11% of the world's natural vegetation receives nitrogen deposition in excess of the "critical load" threshold of 1000 mg(N) m-2/yr. The regions most affected are the United States (20% of vegetation), western Europe (30%), eastern Europe (80%), South Asia (60%), East Asia (40%), southeast Asia (30%), and Japan (50%). Future deposition fluxes are mainly driven by changes in emissions, and less importantly by changes in atmospheric chemistry and climate. The global fraction of vegetation exposed to nitrogen loads in excess of 1000 mg(N) m-2/yr increases globally to 17% for CLE and 25% for A2. In MFR, the reductions in NOy are offset by further increases for NHx deposition. The regions most affected by exceedingly high nitrogen loads for CLE and A2 are Europe and Asia, but also parts of Africa.

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BibTeX Citation

  author={Dentener, F. and Drevet, J. and Lamarque, J. F. and Bey, I. and Eickhout, B. and Fiore, A. M. and Hauglustaine, D. and Horowitz, L. W. and Krol, M. and Kulshrestha, U. C. and Lawrence, M. and Galy-Lacaux, C. and Rast, S. and Shindell, D. and Stevenson, D. and Van Noije, T. and Atherton, C. and Bell, N. and Bergman, D. and Butler, T. and Cofala, J. and Collins, B. and Doherty, R. and Ellingsen, K. and Galloway, J. and Gauss, M. and Montanaro, V. and Müller, J. F. and Pitari, G. and Rodriguez, J. and Sanderson, M. and Solmon, F. and Strahan, S. and Schultz, M. and Sudo, K. and Szopa, S. and Wild, O.},
  title={Nitrogen and sulfur deposition on regional and global scales: A multimodel evaluation},
  journal={Glob. Biogeochem. Cycles},

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RIS Citation

ID  - de08300g
AU  - Dentener, F.
AU  - Drevet, J.
AU  - Lamarque, J. F.
AU  - Bey, I.
AU  - Eickhout, B.
AU  - Fiore, A. M.
AU  - Hauglustaine, D.
AU  - Horowitz, L. W.
AU  - Krol, M.
AU  - Kulshrestha, U. C.
AU  - Lawrence, M.
AU  - Galy-Lacaux, C.
AU  - Rast, S.
AU  - Shindell, D.
AU  - Stevenson, D.
AU  - Van Noije, T.
AU  - Atherton, C.
AU  - Bell, N.
AU  - Bergman, D.
AU  - Butler, T.
AU  - Cofala, J.
AU  - Collins, B.
AU  - Doherty, R.
AU  - Ellingsen, K.
AU  - Galloway, J.
AU  - Gauss, M.
AU  - Montanaro, V.
AU  - Müller, J. F.
AU  - Pitari, G.
AU  - Rodriguez, J.
AU  - Sanderson, M.
AU  - Solmon, F.
AU  - Strahan, S.
AU  - Schultz, M.
AU  - Sudo, K.
AU  - Szopa, S.
AU  - Wild, O.
PY  - 2006
TI  - Nitrogen and sulfur deposition on regional and global scales: A multimodel evaluation
JA  - Glob. Biogeochem. Cycles
VL  - 20
SP  - GB4003
DO  - 10.1029/2005GB002672
ER  -

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