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contributor authorGrabowski, Wojciech W.
date accessioned2017-06-09T16:57:56Z
date available2017-06-09T16:57:56Z
date copyright2014/12/01
date issued2014
identifier issn0022-4928
identifier otherams-77158.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4219685
description abstractsimple methodology is proposed to extract impacts of cloud microphysics on macrophysical cloud-field properties in large-eddy simulations of shallow convection. These impacts are typically difficult to assess because of natural variability of the simulated cloud field. The idea is to use two sets of thermodynamic variables driven by different microphysical schemes or by a single scheme with different parameters as applied here. The first set is coupled to the dynamics as in the standard model, and the second set is applied diagnostically?that is, driven by the flow but without the feedback on the flow dynamics. Having the two schemes operating in the same flow pattern allows for extracting the impact with high confidence. For illustration, the method is applied to simulations of precipitating shallow convection applying a simple bulk representation of warm-rain processes. Because of natural variability, the traditional approach provides an uncertain estimate of the impact of cloud droplet concentration on the mean cloud-field rainfall even with an ensemble of simulations. In contrast, the impact is well constrained while applying the new methodology. The method can even detect minuscule changes of the mean cloud cover and liquid water path despite their large temporal fluctuations and different evolutions within the ensemble.
publisherAmerican Meteorological Society
titleExtracting Microphysical Impacts in Large-Eddy Simulations of Shallow Convection
typeJournal Paper
journal volume71
journal issue12
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/JAS-D-14-0231.1
journal fristpage4493
journal lastpage4499
treeJournal of the Atmospheric Sciences:;2014:;Volume( 071 ):;issue: 012
contenttypeFulltext


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