The POLARCAT Model Intercomparison Project (POLMIP): overview and evaluation with observations

作者：L. K. Emmons, S. R. Arnold, S. A. Monks, Vincent Huijnen, Simone Tilmes, Kathy S. Law, Jennie L. Thomas, Jean‐Christophe Raut, I. Bouarar, Solène Turquéty, Y. Long, B. N. Duncan, Stephen D. Steenrod, Sarah A. Strode, Johannes Flemming, Jingqiu Mao, Joakim Langner, Anne M. Thompson, D. W. Tarasick, Eric C. Apel, D. R. Blake, R. C. Cohen, Jack E. Dibb, Glenn S. Diskin, Alan Fried, Samuel R. Hall, L. G. Huey, A. J. Weinheimer, Armin Wisthaler, Tomáš Mikoviny, J. B. Nowak, Jeff Peischl, J. M. Roberts, Thomas B. Ryerson, C. Warneke, Detlev Helmig · 发表于：Atmospheric chemistry and physics · 年份：2015 · DOI：10.5194/acp-15-6721-2015 · 被引用次数：104 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Atmospheric Ozone and Climate

Abstract. A model intercomparison activity was inspired by the large suite of observations of atmospheric composition made during the International Polar Year (2008) in the Arctic. Nine global and two regional chemical transport models participated in this intercomparison and performed simulations for 2008 using a common emissions inventory to assess the differences in model chemistry and transport schemes. This paper summarizes the models and compares their simulations of ozone and its precursors and presents an evaluation of the simulations using a variety of surface, balloon, aircraft and satellite observations. Each type of measurement has some limitations in spatial or temporal coverage or in composition, but together they assist in quantifying the limitations of the models in the Arctic and surrounding regions. Despite using the same emissions, large differences are seen among the models. The cloud fields and photolysis rates are shown to vary greatly among the models, indicating one source of the differences in the simulated chemical species. The largest differences among models, and between models and observations, are in NOy partitioning (PAN vs. HNO3) and in oxygenated volatile organic compounds (VOCs) such as acetaldehyde and acetone. Comparisons to surface site measurements of ethane and propane indicate that the emissions of these species are significantly underestimated. Satellite observations of NO2 from the OMI (Ozone Monitoring Instrument) have been used to e...