DOI: 10.1007/s00382-014-2256-8
Scopus记录号: 2-s2.0-84932192928
论文题名: Asymmetric intraseasonal events in the stochastic skeleton MJO model with seasonal cycle
作者: Thual S. ; Majda A.J. ; Stechmann S.N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-03-04 起始页码: 603
结束页码: 618
语种: 英语
英文关键词: MJO
; Skeleton model
; Summer monsoon ISO
; Tropical atmospheric dynamics
英文摘要: The stochastic skeleton model is a simplified model for the Madden–Julian oscillation (MJO) and intraseasonal-planetary variability in general involving coupling of planetary-scale dry dynamics, moisture, and a stochastic parametrization for the unresolved details of synoptic-scale activity. The model captures the fundamental features of the MJO such as the intermittent growth and demise of MJO wave trains, the MJO propagation speed, peculiar dispersion relation, quadrupole vortex structure, etc. We analyze here the solutions of a stochastic skeleton model with an idealized seasonal cycle, namely a background warm pool state of heating/moistening displacing meridionally during the year. The present model considers both equatorial and off-equatorial components of the envelope of synoptic scale convective activity, which allows for a large diversity of meridionally symmetric and asymmetric intraseasonal events found in nature. These include examples of symmetric events with MJO quadrupole vortex structure, half-quadrupole events with off-equatorial convective heating structure, as well as tilted events with convective heating structure oriented north-westward and associated northward propagation that is reminiscent of the summer monsoon intraseasonal oscillation. The model also reproduces qualitatively the meridional migration of intraseasonal variability during the year, that approximatively follows the meridional migration of the background warm pool. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54066
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Mathematics, Center for Atmosphere Ocean Science, Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY, United States; Department of Mathematics, University of Wisconsin–Madison, 480 Lincoln Drive, Madison, WI, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin–Madison, 1225 W. Dayton Street, Madison, WI, United States
Recommended Citation:
Thual S.,Majda A.J.,Stechmann S.N.. Asymmetric intraseasonal events in the stochastic skeleton MJO model with seasonal cycle[J]. Climate Dynamics,2015-01-01,45(2017-03-04)