期刊
JOURNAL OF THE ATMOSPHERIC SCIENCES
卷 68, 期 9, 页码 1974-1989出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/2011JAS3592.1
关键词
-
资金
- U.S. Department of Energy [DE-AC06-76RLO1830]
To identify the main thermodynamic processes that sustain the Madden-Julian oscillation (MJO), an eddy available potential energy budget analysis is performed on a regional model simulation with moisture constrained by observations. The model realistically simulates the two MJO episodes observed during the winter of 2007/08. Analysis of these two cases shows that instabilities and damping associated with variations in diabatic heating and energy transport work in concert to provide the MJO with its observed characteristics. The results are used to construct a simplified paradigm of MJO thermodynamics. Furthermore, the effect of moisture nudging on the simulation is analyzed to identify the limitations of the model cumulus parameterization. Without moisture nudging, the parameterization fails to provide adequate low-level (upper level) moistening during the early (late) stage of the MJO active phase. The moistening plays a critical role in providing stratiform heating variability that is an important source of eddy available potential energy for the model MJO.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据