|
|||||
|
|
A comparison of scavenging and deposition processes in global models: results from the WCRP Cambridge Workshop of 1995 |
|
| Authors: | P J RASCH J FEICHTER K LAW N MAHOWALD J PENNER C BENKOVITZ C GENTHON C GIANNAKOPOULOS P KASIBHATLA D KOCH H LEVY T MAKI M PRATHER D L ROBERTS G&#;J ROELOFS D STEVENSON Z STOCKWELL S TAGUCHI M KRITZ M CHIPPERFIELD D BALDOCCHI P McMURRY L BARRIE Y BALKANSKI R CHATFIELD E KJELLSTROM M LAWRENCE H N LEE J LELIEVELD K J NOONE J SEINFELD G STENCHIKOV S SCHWARTZ C WALCEK D WILLIAMSON |
| Institution: | National Center for Atmospheric Research, PO Box 3000, Boulder CO, 80307, USA;;Max Planck Institute for Meteorology, Bundestrasse 55, D‐20146 Hamburg, Germany;;Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, CB2 IEW, Cambridge, UK;;Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, 93106‐5131, USA;;Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, USA;;Environmental Chem. Division, Brookhaven National Laboratory, Upton, NY 11973, USA;;LGGE CNRS, F‐38402, St Martin D'Heres Cedex, France;;School of the Environment, Levine Science Research Center Duke University, Box 90328, Durham, NC 27708, USA;;NASA GISS, 2880 Broadway, NY, NY 10025, USA;;GFDL, Princeton, NJ, 08542‐0308, USA;;JMA 1‐3‐4 Otemachi, Chiyoda‐ku Tokyo 100, Japan;;Department of Earth System Science, University of California, Irvine, CA 92717‐3100, USA;;UK Meteorological Office, London Road, Bracknell, RG12 2SY, UK;;IMAU, Utrecht University, Princetonplein 5, 3584 CC Utrecht, NL;;NIRE, 16‐3, Onogawa, Tsukuba, Ibaraki, 305, Japan;;MSRC, SUNY Albany, PO Box 468, NY;;ATDD NOAA, Oak Ridge, TN, 37831, USA;;University of Minnesota, Minneapolis, MINN 55455, USA;;AES Downsview, ONT, Canada M3H 5T4;;LMCE, CEA‐DSM, 91191 Gif‐Yvette, France;;MISU, S‐106 91 Stockholm, Sweden;;MPI for Chemistry, 55122 Mainz, Germany;;EML USDOE NY, NY 10014‐35621, USA;;University of Maryland, College Park, MD 20742, USA;;ASRC‐SUNY Albany, NY 12205, USA. |
| Abstract: | We report on results from a World Climate Research Program workshop on representations of scavenging and deposition processes in global transport models of the atmosphere. 15 models were evaluated by comparing simulations of radon, lead, sulfur dioxide, and sulfate against each other, and against observations of these constituents. This paper provides a survey on the simulation differences between models. It identifies circumstances where models are consistent with observations or with each other, and where they differ from observations or with each other. The comparison shows that most models are able to simulate seasonal species concentrations near the surface over continental sites to within a factor of 2 over many regions of the globe. Models tend to agree more closely over source (continental) regions than for remote (polar and oceanic) regions. Model simulations differ most strongly in the upper troposphere for species undergoing wet scavenging processes. There are not a sufficient number of observations to characterize the climatology (long‐term average) of species undergoing wet scavenging in the upper troposphere. This highlights the need for either a different strategy for model evaluation (e.g., comparisons on an event by event basis) or many more observations of a few carefully chosen constituents. |
| Keywords: | |