Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0260.1 |
Upscale Impact of Mesoscale Convective Systems and Its Parameterization in an Idealized GCM for an MJO Analog above the Equator | |
Yang, Qiu1; Majda, Andrew J.1,2,3; Moncrieff, Mitchell W.4 | |
2019-03-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:3页码:865-892 |
文章类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates; USA |
英文摘要 | The Madden-Julian oscillation (MJO) typically contains several superclusters and numerous embedded mesoscale convective systems (MCSs). It is hypothesized here that the poorly simulated MJOs in current coarse-resolution global climate models (GCMs) is related to the inadequate treatment of unresolved MCSs. So its parameterization should provide the missing collective effects of MCSs. However, a satisfactory understanding of the upscale impact of MCSs on the MJO is still lacking. A simple two-dimensional multicloud model is used as an idealized GCM with clear deficiencies. Eddy transfer of momentum and temperature by the MCSs, predicted by the mesoscale equatorial synoptic dynamics (MESD) model, is added to this idealized GCM. The upscale impact of westward-moving MCSs promotes eastward propagation of the MJO analog, consistent with the theoretical prediction of the MESD model. Furthermore, the upscale impact of upshear-moving MCSs significantly intensifies the westerly wind burst because of two-way feedback between easterly vertical shear and eddy momentum transfer with low-level eastward momentum forcing. Finally, a basic parameterization of the upscale impact of upshear-moving MCSs modulated by deep heating excess and vertical shear strength significantly improves key features of the MJO analog in the idealized GCM with clear deficiencies. A three-way interaction mechanism between the MJO analog, parameterized upscale impact of MCSs, and background vertical shear is identified. |
英文关键词 | Convection Madden-Julian oscillation Mesoscale systems Wind shear General circulation models Parameterization |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461046000002 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; TOGA COARE IOP ; SIMPLE MULTICLOUD PARAMETERIZATION ; ORGANIZED TROPICAL CONVECTION ; LARGE-SCALE ORGANIZATION ; PACIFIC WARM POOL ; MOMENTUM TRANSPORT ; DIURNAL CYCLE ; MULTISCALE MODEL ; PART II |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29213 |
专题 | 地球科学 |
作者单位 | 1.New York Univ Abu Dhabi, Ctr Prototype Climate Modeling, Abu Dhabi, U Arab Emirates; 2.NYU, Dept Math, New York, NY USA; 3.NYU, Courant Inst Math Sci, Ctr Atmosphere Ocean Sci, New York, NY USA; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Yang, Qiu,Majda, Andrew J.,Moncrieff, Mitchell W.. Upscale Impact of Mesoscale Convective Systems and Its Parameterization in an Idealized GCM for an MJO Analog above the Equator[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(3):865-892. |
APA | Yang, Qiu,Majda, Andrew J.,&Moncrieff, Mitchell W..(2019).Upscale Impact of Mesoscale Convective Systems and Its Parameterization in an Idealized GCM for an MJO Analog above the Equator.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(3),865-892. |
MLA | Yang, Qiu,et al."Upscale Impact of Mesoscale Convective Systems and Its Parameterization in an Idealized GCM for an MJO Analog above the Equator".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.3(2019):865-892. |
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