Nitrogen deposition on regional and global scales:
Download
1 / 23

ACCENT intercomparison (Expt. 2) - PowerPoint PPT Presentation


  • 57 Views
  • Uploaded on

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' ACCENT intercomparison (Expt. 2)' - jaunie


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Nitrogen deposition on regional and global scales: a multi-model evaluationF.J. Dentener1, J. Drevet2, D.S. Stevenson3, K. Ellingsen4, T.P.C. van Noije5, M.G. Schultz6, C.S. Atherton7, N. Bell8, T. Butler9, B. Eickhout10, A.M. Fiore11, J. Galloway12, C. Galy-Lacaux13, U.C. Kulshresta14, J.-F. Lamarque15, V. Montanaro16, J.-F. Müller17, J.M. Rodriguez18, M.G. Sanderson19, N.H. Savage20, S. Szopa21, K. Sudo22, O. Wild22, G. Zeng201. JRC, Ispra, Italy. 2. EPFL, Lausanne, Switzerland. 3. University of Edinburgh, UK4. University of Oslo, Norway. 5. KNMI, De Bilt, The Netherlands. 6. MPI-Met, Hamburg, Germany. 7. LLNL, Livermore, USA. 8. NASA-GISS, New York, USA. 9. MPI-Chem, Mainz, Germany. 10. RIVM, Bilthoven, The Netherlands 11. NOAA GFDL, Princeton, USA. 12. University of Virginia, USA. 13. Observatoire Midi-Pyrénées, France. 14. Indian Institute of Chemical Technology, Hyderabad, India. 15. NCAR, Boulder, USA.16. Università L'Aquila, Italy.17. IASB, Brussels, Belgium. 18. GEST, Washington, DC, USA. 19. Met Office, UK. 20. University of Cambridge, UK. 21. LSCE, Gif-sur-Yvette, France.22. FRSGC JAMSTEC, Yokohama, Japan.


Accent intercomparison expt 2

Future changes in composition related to emissions

1 year runs

Future changes in composition related to climate change

5-10 year runs

ACCENT intercomparison (Expt. 2)

  • Focus on 2030 – of direct interest to policymakers

  • Go beyond radiative forcing: also consider ozone AQ, N- and S-deposition, and the use of satellite data to evaluate models

  • Present-day base case for evaluation:

    • S1: 2000

  • Consider three 2030 emissions scenarios:

    • S2: 2030 IIASA CLE (‘likely’)

    • S3: 2030 IIASA MFR (‘optimistic’)

    • S4: 2030 SRES A2 (‘pessimistic’)

  • Also consider the effect of climate change:

    • S5: 2030 CLE + imposed 2030 climate


Global NOx emission scenarios

SRES A2

CLE

MFR

2000

2030

Figure 1. Projected development of IIASA anthropogenic NOx emissions by SRES world region (Tg NO2 yr-1).


Other emissions categories
Other emissions categories

  • EDGAR3.2 ship emissions, and assumed 1.5%/yr growth in all scenarios

  • Biomass burning emissions from van der Werf et al. (2003) – assumed these remained fixed to 2030 in all scenarios

  • Aircraft emissions from IPCC(1999)

  • Modellers used their own natural emissions

  • Specified fixed global CH4 for each case (from earlier transient runs)


Requested model diagnostics
Requested model diagnostics

  • Monthly mean, full 3-D

    • O3, NO, NO2, CO, OH, …

    • O3 budget terms

    • CH4 + OH

    • NOy, NHx and SOx deposition fluxes

    • T, Q, etc. for climate change runs

  • Daily NO2 column (GOME comparison)

  • Hourly surface O3 (for AQ analysis)

  • NETCDF files submitted to central database


26 participating models

CHASER_CTM

CHASER_GCM

FRSGC/UCI

GEOS-CHEM

GISS

GMI/CCM3

GMI/DAO

GMI/GISS

IASB

LLNL-IMPACT

LMDz/INCA-CTM

LMDz/INCA-GCM

MATCH-MPIC/ECMWF

MATCH-MPIC/NCEP

MOZ2-GFDL

MOZART4

MOZECH

MOZECH2

p-TOMCAT

STOCHEM-HadAM3

STOCHEM-HadGEM

TM4

TM5

UIO_CTM2

ULAQ

UM_CAM

26 Participating Models

CTMs driven by analyses

CTMs coupled to GCMs

CTMs driven by GCM output



Mean model v obs hno 3 wet dep
Mean model v Obs. HNO3 Wet dep.

N. AMERICA

EUROPE

AFRICA

E. ASIA




Mean model v obs nh 4 wet dep
Mean model v Obs. NH4 Wet dep.

N. AMERICA

EUROPE

AFRICA

E. ASIA



Different model resolutions
Different model resolutions

3°x3°

1°x1°

Meanmodel

5°x5°



Changes in NOy dep 2000-2030, under 3 scenarios

IIASA CLE

IIASA MFR

SRES A2


Changes in NHx dep 2000-2030, under 2 scenarios

IIASA CLE

SRES A2



Annual NH region3 emission & NHx deposition (per unit area) by region(mean model)


Fraction of NOy deposition to natural vegetation, regionagriculture/urban, soil/desert, and water/ice


Fraction of NHx deposition to natural vegetation, regionagriculture/urban, soil/desert, and water/ice


% of natural vegetation with N regionr dep > 1 g N/m2/yr


ad