Multi-scale Organization of Convection in a Global Numerical Simulation of the December 2006 MJO Event Using Explicit Moist Processes
Multi-scale Organization of Convection in a Global Numerical Simulation of the December 2006 MJO Event Using Explicit Moist Processes
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使用显式潮湿过程对 2006 年 12 月 MJO 事件进行全球数值模拟中的多尺度对流组织
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Oouchi
中科院分区：
文献类型：
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作者：
T. Nasuno;H. Miura;M. Satoh;A. Noda;K. Oouchi
利用显式湿物理数值试验研究了2006年12月至2007年1月发生的Madden-Julian振荡（MJO）事件的多尺度对流组织。模拟成功地再现了向东传播的（0.5 m s-1）的对流包络，其纬向尺度为5000- 10，000 km，其中包括向东传播的（10-15 m s-1）扰动（EPD）和向西传播的云团（CC），其纬向尺度为1000-2000 km和O（100 km），模拟的EPD由CC组成，新的集群生长到旧集群的东部。当与MJO相关的大尺度环流增强时，EPD形成组织良好的飑线型云团（雨带）。模拟的EPD的动力学结构令人想起湿开尔文波。向西传播的波扰动，包括越赤道流的对流组织中的EPD的相关性也提出了建议。
Multi-scale convective organization in a Madden-Julian Oscillation (MJO) event that occurred during December 2006 and January 2007 was studied by global numerical experiments using explicit moist physics. The simulations successfully reproduced the eastward-propagating (∼5 m s-1) convective envelope of the MJO with a zonal scale of 5000-10,000 km, which included eastward-propagating (10-15 m s-1) disturbances (EPDs) and westward-propagating cloud clusters (CCs) with zonal scales of 1000-2000 km and O (100 km), respectively.The simulated EPDs were composed of CCs, with new clusters growing to the east of older ones. When the large-scale circulation associated with the MJO intensified, the EPDs formed well-organized squall-type clusters (rainbands). The dynamical structure of the simulated EPDs was reminiscent of moist Kelvin waves. Relevance of westward-propagating wave disturbances including cross-equatorial flow to convective organization in the EPDs was also suggested.