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DOI | 10.1175/JCLI-D-16-0556.1 |
A Simple Model of the Life Cycle of Mesoscale Convective Systems Cloud Shield in the Tropics | |
Roca, R.1; Fiolleau, T.2,3; Bouniol, D.2,3 | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Mesoscale convective systems (MCSs) are important to the water and energy budget of the tropical climate and are essential ingredients of the tropical circulation. MCSs are readily observed in satellite infrared geostationary imagery as cloud clusters that evolve in time from small structures to well-organized large patches of cloud shield before dissipating. The MCS cloud shield is the result of a large ensemble of mesoscale dynamical, thermodynamical, and microphysical processes. This study shows that a simple parametric model can summarize the time evolution of the morphological characteristics of the cloud shield during the life cycle of the MCS. It consists of a growth-decay linear model of the cloud shield and is based on three parameters: the time of maximum extent, the maximum extent, and the duration of the MCS. It is shown that the time of maximum is frequently close to the middle of the life cycle and that the correlation between maximum extent and duration is strong all over the tropics. This suggests that 1 degree of freedom is left to summarize the life cycle of the MCS cloud shield. Such a model fits the observed MCS equally well, independent of the duration, size, location, and propagation characteristics, and its relevance is assessed for a large number of MCSs over three boreal summer periods over the whole tropical belt. The scaling of this simple model exhibits weak (strong) regional variability for the short- (long-) lived systems indicative of the primary importance of the internal dynamics of the systems to the large-scale environment for MCS sustainability. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401007500020 |
WOS关键词 | PACIFIC WARM POOL ; SATELLITE-OBSERVATIONS ; RADIATIVE PROPERTIES ; DIURNAL-VARIATIONS ; EQUATORIAL AFRICA ; SCALE DEPENDENCE ; WESTERN PACIFIC ; DEEP CONVECTION ; TRMM ; EVOLUTION |
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/19727 |
专题 | 气候变化 |
作者单位 | 1.Univ Toulouse III, CNRS, CNES, Lab Etud Geophys & Oceanog Spatiales,IRD, Toulouse, France; 2.Meteo France, Ctr Natl Rech Meteorol GAME, Toulouse, France; 3.CNRS, Toulouse, France |
推荐引用方式 GB/T 7714 | Roca, R.,Fiolleau, T.,Bouniol, D.. A Simple Model of the Life Cycle of Mesoscale Convective Systems Cloud Shield in the Tropics[J]. JOURNAL OF CLIMATE,2017,30(11). |
APA | Roca, R.,Fiolleau, T.,&Bouniol, D..(2017).A Simple Model of the Life Cycle of Mesoscale Convective Systems Cloud Shield in the Tropics.JOURNAL OF CLIMATE,30(11). |
MLA | Roca, R.,et al."A Simple Model of the Life Cycle of Mesoscale Convective Systems Cloud Shield in the Tropics".JOURNAL OF CLIMATE 30.11(2017). |
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