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Title: The effect of horizontal resolution on simulation quality in the Community Atmospheric Model, CAM5.1

We present an analysis of version 5.1 of the Community Atmospheric Model (CAM5.1) at a high horizontal resolution. Intercomparison of this global model at approximately 0.25°, 1°, and 2° is presented for extreme daily precipitation as well as for a suite of seasonal mean fields. In general, extreme precipitation amounts are larger in high resolution than in lower-resolution configurations. In many but not all locations and/or seasons, extreme daily precipitation rates in the high-resolution configuration are higher and more realistic. The high-resolution configuration produces tropical cyclones up to category 5 on the Saffir-Simpson scale and a comparison to observations reveals both realistic and unrealistic model behavior. In the absence of extensive model tuning at high resolution, simulation of many of the mean fields analyzed in this study is degraded compared to the tuned lower-resolution public released version of the model.
 [1] ;  [2] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [1] ;  [2] ;  [6]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. National Center for Atmospheric Research, Boulder, CO (United States)
  3. National Taiwan Normal Univ., Taipei (Taiwan)
  4. Univ. of California, Berkeley, CA (United States)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Univ. of Michigan, Ann Arbor, MI (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1942-2466
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; SC0006684
Accepted Manuscript
Journal Name:
Journal of Advances in Modeling Earth Systems
Additional Journal Information:
Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 1942-2466
American Geophysical Union (AGU)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
58 GEOSCIENCES; high resolution; global atmospheric modeling; extreme precipitation; tropical cyclones
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1407263; OSTI ID: 1411698