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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 110,
D19303,
doi:10.1029/2005JD005825,
2005
Assessing future nitrogen deposition and carbon cycle feedback using a multimodel approach: Analysis of nitrogen deposition
J.-F. Lamarque
National Center for Atmospheric Research, Boulder, Colorado, USA
J. T. Kiehl
National Center for Atmospheric Research, Boulder, Colorado, USA
G. P. Brasseur
Max-Planck Institute for Meteorology, Hamburg, Germany
T. Butler
Max-Planck Institute for Chemistry, Mainz, Germany
P. Cameron-Smith
Lawrence Livermore National Laboratory, Livermore, California, USA
W. D. Collins
National Center for Atmospheric Research, Boulder, Colorado, USA
W. J. Collins
Hadley Centre, Met Office, Exeter, UK
C. Granier
Max-Planck Institute for Meteorology, Hamburg, Germany Service d'Aéronomie/Institut Pierre-Simon Laplace, Paris, France CIRES/NOAA Aeronomy Laboratory, Boulder, Colorado, USA
D. Hauglustaine
Laboratoire des Sciences du Climat et de l'Environnement/Institut Pierre-Simon Laplace, Gif sur Yvette, France
P. G. Hess
National Center for Atmospheric Research, Boulder, Colorado, USA
E. A. Holland
National Center for Atmospheric Research, Boulder, Colorado, USA
L. Horowitz
Geophysical Fluid Dynamics Laboratory/NOAA, Princeton, New Jersey, USA
M. G. Lawrence
Max-Planck Institute for Chemistry, Mainz, Germany
D. McKenna
National Center for Atmospheric Research, Boulder, Colorado, USA
P. Merilees
National Center for Atmospheric Research, Boulder, Colorado, USA
M. J. Prather
Earth System Science, University of California, Irvine, California, USA
P. J. Rasch
National Center for Atmospheric Research, Boulder, Colorado, USA
D. Rotman
Lawrence Livermore National Laboratory, Livermore, California, USA
D. Shindell
NASA Goddard Institute for Space Studies, New York, New York, USA
P. Thornton
National Center for Atmospheric Research, Boulder, Colorado, USA
Abstract
In this study, we present the results of nitrogen deposition on land from a set of 29 simulations from six different tropospheric
chemistry models pertaining to present-day and 2100 conditions. Nitrogen deposition refers here to the deposition (wet and
dry) of all nitrogen-containing gas phase chemical species resulting from NOx (NO + NO2) emissions. We show that under the assumed IPCC SRES A2 scenario the global annual average nitrogen deposition over land
is expected to increase by a factor of ∼2.5, mostly because of the increase in nitrogen emissions. This will significantly
expand the areas with annual average deposition exceeding 1 gN/m2/year. Using the results from all models, we have documented the strong linear relationship between models on the fraction
of the nitrogen emissions that is deposited, regardless of the emissions (present day or 2100). On average, approximately
70% of the emitted nitrogen is deposited over the landmasses. For present-day conditions the results from this study suggest
that the deposition over land ranges between 25 and 40 Tg(N)/year. By 2100, under the A2 scenario, the deposition over the
continents is expected to range between 60 and 100 Tg(N)/year. Over forests the deposition is expected to increase from 10
Tg(N)/year to 20 Tg(N)/year. In 2100 the nitrogen deposition changes from changes in the climate account for much less than
the changes from increased nitrogen emissions.
Received 31
January
2005;
accepted 7
July
2005;
published 5
October
2005.
Keywords: nitrogen deposition;
carbon cycle;
nitrogen oxides;
IPCC A2 scenario.
Index Terms: 0426 Biogeosciences: Biosphere/atmosphere interactions (0315); 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 0469 Biogeosciences: Nitrogen cycling.
Read Full Article (file size: 8853755 bytes) Cited by
Citation: Lamarque, J.-F., et al.
(2005),
Assessing future nitrogen deposition and carbon cycle feedback using a multimodel approach: Analysis of nitrogen deposition,
J. Geophys. Res.,
110,
D19303,
doi:10.1029/2005JD005825.
Copyright 2005 by the American Geophysical Union.
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