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Journal of Advances in Modeling Earth Systems

Cover image for Journal of Advances in Modeling Earth Systems

March 2013

Volume 5, Issue 1

Pages 1–116

  1. Regular Articles

    1. Top of page
    2. Regular Articles
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      Climate and climate change in a radiative-convective equilibrium version of ECHAM6 (pages 1–14)

      D. Popke, B. Stevens and A. Voigt

      Article first published online: 28 JAN 2013 | DOI: 10.1029/2012MS000191

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      Key Points

      • ECHAM6 is configured to run in RCE with a mixed-layer ocean
      • RCE similar to tropics in mean vertical structure and overturning circulation
      • Lower climate sensitivity in RCE than in full GCM although feedbacks are present
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      Global dust simulations in the multiscale modeling framework (pages 15–31)

      W. C. Hsieh, D. Rosa and W. D. Collins

      Article first published online: 7 FEB 2013 | DOI: 10.1029/2012MS000150

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      Key Points

      • Vertical transport in CAM lift tracers more efficiently than SPCAM in low layers
      • The dust implementation method is crucial for the simulated dust profiles
      • Treatments of convection processes can significantly affect dust budgets
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      Sensitivity of tropical intraseasonal variability to the pattern of climate warming (pages 32–47)

      Eric D. Maloney and Shang-Ping Xie

      Article first published online: 7 FEB 2013 | DOI: 10.1029/2012MS000171

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      Key Points

      • Future MJO activity is sensitive to the pattern of SST change
      • Care should be taken in future projections of MJO
      • Process-oriented diagnosis of why MJO might change in future
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      Evaluation of vegetation cover and land-surface albedo in MPI-ESM CMIP5 simulations (pages 48–57)

      V. Brovkin, L. Boysen, T. Raddatz, V. Gayler, A. Loew and M. Claussen

      Article first published online: 7 FEB 2013 | DOI: 10.1029/2012MS000169

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      Key Points

      • Two metrics are proposed to evaluate vegetation cover simulated by ESMs
      • On a global scale, tree cover is satisfactory simulated by MPI-ESM
      • Land-surface albedois evaluated using the net surface radiation
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      Parameter estimation using data assimilation in an atmospheric general circulation model: From a perfect toward the real world (pages 58–70)

      Sebastian Schirber, Daniel Klocke, Robert Pincus, Johannes Quaas and Jeffrey L. Anderson

      Article first published online: 4 MAR 2013 | DOI: 10.1029/2012MS000167

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      Key Points

      • Objective parameter estimation using Ensemble Kalman Filter techniques
      • Cumulus-convection scheme of an atmospheric general circulation model
      • Applying numerical weather prediction techniques to a climate model
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      Madden-Julian oscillation as simulated by the MPI Earth System Model: Over the last and into the next millennium (pages 71–84)

      Jonathan J. Schubert, Bjorn Stevens and Traute Crueger

      Article first published online: 4 MAR 2013 | DOI: 10.1029/2012MS000180

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      Key Points

      • The MJO varies on interannual to interdecadal time scales
      • Solar variability and volcanoes may have influenced the MJO strength marginally
      • CO2 increased by 1% per year over 150 yrs show the MJO to strengthen by 11%
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      Tropical precipitation and convection changes in the Max Planck Institute Earth system model (MPI-ESM) in response to CO2 forcing (pages 85–97)

      Traute Crueger, Cathy Hohenegger and Wilhelm May

      Article first published online: 6 MAR 2013 | DOI: 10.1002/jame.20012

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      Key Points

      • Convection scheme obeys climate change rules derived from CRM except over land
      • Link to land surface processes yields different precipitation sensitivity to CO2
      • Tropical deep convection gets less frequent (-5.5%/K) and deeper (3.8 %/K)
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      Response of the middle atmosphere to anthropogenic and natural forcings in the CMIP5 simulations with the Max Planck Institute Earth system model (pages 98–116)

      H. Schmidt, S. Rast, F. Bunzel, M. Esch, M. Giorgetta, S. Kinne, T. Krismer, G. Stenchikov, C. Timmreck, L. Tomassini and M. Walz

      Article first published online: 6 MAR 2013 | DOI: 10.1002/jame.20014

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      Key Points

      • Middle atmosphere features of the MPI-ESM and external data are described
      • Middle atmosphere response to climate forcing in CMIP5 simulations is discussed
      • Future middle atmosphere evolution depends strongly on the emission scenario

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