DOI: 10.1175/JCLI-D-16-0069.1
Scopus记录号: 2-s2.0-85020088698
论文题名: An explanation for the sensitivity of the mean state of the community atmosphere model to horizontal resolution on aquaplanets
作者: Herrington A.R. ; Reed K.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 13 起始页码: 4781
结束页码: 4797
语种: 英语
英文摘要: The sensitivity of the mean state of the Community Atmosphere Model to horizontal resolutions typical of present-day general circulation models is investigated in an aquaplanet configuration. Nonconvergence of the mean state is characterized by a progressive drying of the atmosphere and large reductions in cloud coverage with increasing resolution. Analyses of energy and moisture budgets indicate that these trends are balanced by variations in moisture transport by the resolved circulation, and a reduction in activity of the convection scheme. In contrast, the large-scale precipitation rate increases with resolution, which is approximately balanced by greater advection of dry static energy associated with more active resolved vertical motion in the ascent region of the Hadley cell. An explanation for the sensitivity of the mean state to horizontal resolution is proposed, based on linear Boussinesq theory. The authors hypothesize that an increase in horizontal resolution in the model leads to a reduction in horizontal scale of the diabatic forcing arising from the column physics, facilitating finescale flow and faster resolved convective updrafts within the dynamical core, and steering the coupled system toward a new mean state. This hypothesis attempts to explain the underlying mechanism driving the variations in moisture transport observed in the simulations. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48815
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, NY, United States
Recommended Citation:
Herrington A.R.,Reed K.A.. An explanation for the sensitivity of the mean state of the community atmosphere model to horizontal resolution on aquaplanets[J]. Journal of Climate,2017-01-01,30(13)