Convective Self-Aggregation in Numerical Simulations: A Review |
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Authors: | Allison A Wing Kerry Emanuel Christopher E Holloway Caroline Muller |
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Institution: | 1.Lamont-Doherty Earth Observatory,Columbia University,Palisades,USA;2.Florida State University,Tallahassee,USA;3.Massachusetts Institute of Technology,Cambridge,USA;4.University of Reading,Reading,UK;5.Laboratoire de Météorologie Dynamique,école Normale Supérieure,Paris,France |
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Abstract: | Organized convection in the tropics occurs across a range of spatial and temporal scales and strongly influences cloud cover and humidity. One mode of organization found is “self-aggregation,” in which moist convection spontaneously organizes into one or several isolated clusters despite spatially homogeneous boundary conditions and forcing. Self-aggregation is driven by interactions between clouds, moisture, radiation, surface fluxes, and circulation, and occurs in a wide variety of idealized simulations of radiative–convective equilibrium. Here we provide a review of convective self-aggregation in numerical simulations, including its character, causes, and effects. We describe the evolution of self-aggregation including its time and length scales and the physical mechanisms leading to its triggering and maintenance, and we also discuss possible links to climate and climate change. |
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