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Comparison of Cloud-Resolving with Single Column Simulations of Summertime Midlatitude Convection

Xu, K.-M.(a), Krueger, S.K.(b), Randall, D.A.(c), Cederwall, R.T.(d), Xie, S.C.(d), and Yio, J.J.(d), NASA Langley (a), University of Utah (b), Colorado State University (c), Lawrence Livermore National Laboratory (d)
Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting

This paper presents a comparison of cloud-resolving model (CRM) and single-column model (SCM) simulations of midlatitude continental cumulus convection observed during the Summer 1997 Intensive Observation Period (IOP) of the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) program. The simulation results by eight 2-D, two 3-D CRMs and 15 SCMs are contrasted between these two groups of the models in terms of their abilities of simulating the cloud processes. Unlike the earlier studies (Xu et al, 2002; Xie et al. 2002), this study compares the simulations by CRMs and SCMs as two groups, using the mean results and the spread among the models as represented by two standard deviations. As expected, the spreads are generally much larger for the SCM group than for the CRM group, while the means are extremely close to each other in many time series and vertical profiles. This implies that SCMs as a group have more rooms for further improvements. Detailed results are presented during the meeting as more results will be analyzed soon.

Note: This is the poster abstract presented at the meeting; an extended version was not provided by the author(s).