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Journal of Advances in Modeling Earth Systems

Cover image for Journal of Advances in Modeling Earth Systems

December 2013

Volume 5, Issue 4

Pages 659–849

  1. Regular Articles

    1. Top of page
    2. Regular Articles
    3. Short Topics
    1. You have free access to this content
      Simulating soil freeze/thaw dynamics with an improved pan-Arctic water balance model (pages 659–675)

      M. A. Rawlins, D. J. Nicolsky, K. C. McDonald and V. E. Romanovsky

      Article first published online: 1 OCT 2013 | DOI: 10.1002/jame.20045

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      Key Points

      • Model accounts for organic soil properties and snow density variations
      • Model captures range in soil temperatures over small areas during most months
      • Links between future change in precipitation, snowfall, and soil regime explored
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      Forcing and feedback in the MPI-ESM-LR coupled model under abruptly quadrupled CO2 (pages 676–691)

      K. Block and T. Mauritsen

      Article first published online: 2 OCT 2013 | DOI: 10.1002/jame.20041

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      Key Points

      • Effective climate sensitivity could be considered a function of climate state
      • Fast cloud and temperature adjustments contribute to forcing
      • Feedbacks and fast adjustments in MPI-ESM-LR are documented
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      Does convective aggregation need to be represented in cumulus parameterizations? (pages 692–703)

      Isabelle Tobin, Sandrine Bony, Chris E. Holloway, Jean-Yves Grandpeix, Geneviève Sèze, David Coppin, Steve J. Woolnough and Rémy Roca

      Article first published online: 2 OCT 2013 | DOI: 10.1002/jame.20047

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      Key Points

      • Mesoscale convective aggregation affects atmospheric moisture and radiation
      • Aggregation effects must be represented in parameterizations
      • Convective aggregation effects are reproduced by a CSRM
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      MAC-v1: A new global aerosol climatology for climate studies (pages 704–740)

      Stefan Kinne, Declan O'Donnel, Philip Stier, Silvia Kloster, Kai Zhang, Hauke Schmidt, Sebastian Rast, Marco Giorgetta, Tom F. Eck and Bjorn Stevens

      Article first published online: 4 OCT 2013 | DOI: 10.1002/jame.20035

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      Key Points

      • Aerosol monthly climatology for global modeling
      • Aerosol direct radiative effects
      • Temporal change in aerosol direct radiative forcing
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      Effects of nitrogen limitation on hydrological processes in CLM4-CN (pages 741–754)

      Eungul Lee, Benjamin S. Felzer and Zavareh Kothavala

      Article first published online: 4 OCT 2013 | DOI: 10.1002/jame.20046

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      Key Points

      • Modified the incomplete carbon-nitrogen coupling linked to N-limitation
      • Identified the effects of N-limitation on canopy transpiration and runoff
      • Improved hydrological processes in the modified version of CLM4-CN
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      Sources and sinks of entropy in the atmosphere (pages 755–763)

      David J. Raymond

      Article first published online: 31 OCT 2013 | DOI: 10.1002/jame.20050

      Key Points

      • The moist entropy budget must be treated correctly in climate models
      • A means of eliminating numerical entropy sources in models is presented
      • Physical entropy sources in the atmosphere are assessed
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      A sensitivity theory for the equilibrium boundary layer over land (pages 764–784)

      Timothy W. Cronin

      Article first published online: 4 NOV 2013 | DOI: 10.1002/jame.20048

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      Key Points

      • We develop an analytic sensitivity theory for an idealized boundary layer model
      • The theory estimates how much the land surface warms due to drying
      • Our theory agrees well with simulation results from a more complex model
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      Development and verification of a new wind speed forecasting system using an ensemble Kalman filter data assimilation technique in a fully coupled hydrologic and atmospheric model (pages 785–800)

      John L. Williams III, Reed M. Maxwell and Luca Delle Monache

      Article first published online: 6 NOV 2013 | DOI: 10.1002/jame.20051

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      Key Points

      • EnKF data assimilation applied to coupled hydrologic and atmospheric systems
      • Reduction of surface and subsurface uncertainty propagates to the atmosphere
      • Optimized surface data collection can improve wind energy forecasts
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      Controls on and impacts of the diurnal cycle of deep convective precipitation (pages 801–815)

      C. Hohenegger and B. Stevens

      Article first published online: 22 NOV 2013 | DOI: 10.1002/2012MS000216

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      Key Points

      • Biases in the convective diurnal cycle do not project onto main climatic biases
      • The misrepresented diurnal cycle over land is mainly not due to entrainment
      • The misrepresented diurnal cycle over ocean can be due to entrainment
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      Rotating radiative-convective equilibrium simulated by a cloud-resolving model (pages 816–825)

      Marat Khairoutdinov and Kerry Emanuel

      Article first published online: 24 DEC 2013 | DOI: 10.1002/2013MS000253

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      Key Points

      • The number of tropical cyclones decreases as sea-surface temperature increases
      • The size and intensity of tropical cyclones increase with increasing SST
      • The outflow temperature of TCs stays approximately constant
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      CGILS: Results from the first phase of an international project to understand the physical mechanisms of low cloud feedbacks in single column models (pages 826–842)

      Minghua Zhang, Christopher S. Bretherton, Peter N. Blossey, Phillip H. Austin, Julio T. Bacmeister, Sandrine Bony, Florent Brient, Suvarchal K. Cheedela, Anning Cheng, Anthony D. Del Genio, Stephan R. De Roode, Satoshi Endo, Charmaine N. Franklin, Jean-Christophe Golaz, Cecile Hannay, Thijs Heus, Francesco Alessandro Isotta, Jean-Louis Dufresne, In-Sik Kang, Hideaki Kawai, Martin Köhler, Vincent E. Larson, Yangang Liu, Adrian P. Lock, Ulrike Lohmann, Marat F. Khairoutdinov, Andrea M. Molod, Roel A. J. Neggers, Philip Rasch, Irina Sandu, Ryan Senkbeil, A. Pier Siebesma, Colombe Siegenthaler-Le Drian, Bjorn Stevens, Max J. Suarez, Kuan-Man Xu, Knut von Salzen, Mark J. Webb, Audrey Wolf and Ming Zhao

      Article first published online: 26 DEC 2013 | DOI: 10.1002/2013MS000246

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      Key Points

      • Reasons of negative and positive cloud feedbacks in SCMs are explained
      • A framework is provided to interpret cloud feedbacks in models
      • SCM results are compared with LES simulations
  2. Short Topics

    1. Top of page
    2. Regular Articles
    3. Short Topics
    1. You have free access to this content
      The climate time scale in the approach to radiative-convective equilibrium (pages 843–849)

      Timothy W. Cronin and Kerry A. Emanuel

      Article first published online: 29 OCT 2013 | DOI: 10.1002/jame.20049

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      Key Points

      • We discuss the long time scale of approach to RCE with an interactive surface
      • Moisture significantly increases the thermal inertia of the atmosphere
      • Theoretical results agree well with simulations from a single-column model

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