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Effects of Dimensionality on Simulated Large-Scale Convective Organization and Coupled Waves
Liu, CH (Liu, Changhai)[1,2]; Moncrieff, MW (Moncrieff, Mitchell W.)[1]; Hsu, HM (Hsu, Hsiao-Ming)[1]; Liu, XD (Liu, Xiaodong)[2]
2012-02-28
Source PublicationJOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN
Volume90Issue:1Pages:59-78
Subtype期刊论文
Abstract

Tropical multi-scale convective organization of the super-cluster kind and convectively coupled gravity waves are investigated by both two and three-dimensional cloud-system-resolving simulations. The experimental setup includes a constant-temperature ocean surface, constant and horizontally-uniform radiative cooling in the troposphere, and a uniform easterly background wind. The objective of this study is to quantify the impacts of dimensionality on the simulated large-scale convective patterns and associated gravity waves. Eastward propagating large-scale coherent precipitating convection occurs regardless of the spatial dimension. The convective organization has a horizontal wavenumber-one structure in the computational domain and travels at about 13-17 m s(-1) relative to the ground, equivalent to 19-23 m s(-1) relative to the environmental flow. However, the convectively-induced wave signature is much weaker in three dimensions than in two dimensions, as well as a faster translation and a smaller tilt of the vertical. Moreover, a two-dimensional framework generates additional organizational modes compared to the three-dimensional results, including a fast westward-moving system with a mean-flow-relative speed comparable to the eastward-moving wavenumber-1 counterpart and the quasi-stationary (relative to the background flow) higher wavenumber precipitating system. This does not necessarily imply that these additional modes are artifacts of two dimensionality.

DOI10.2151/jmsj.2012-104
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10152
Collection古环境研究室
Corresponding AuthorLiu, CH (Liu, Changhai)[1,2]
Affiliation1.National Center for Atmospheric Research∗, Boulder, Colorado, U.S.A.;
2.Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China
Recommended Citation
GB/T 7714
Liu, CH ,Moncrieff, MW ,Hsu, HM ,et al. Effects of Dimensionality on Simulated Large-Scale Convective Organization and Coupled Waves[J]. JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN,2012,90(1):59-78.
APA Liu, CH ,Moncrieff, MW ,Hsu, HM ,&Liu, XD .(2012).Effects of Dimensionality on Simulated Large-Scale Convective Organization and Coupled Waves.JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN,90(1),59-78.
MLA Liu, CH ,et al."Effects of Dimensionality on Simulated Large-Scale Convective Organization and Coupled Waves".JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN 90.1(2012):59-78.
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