Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080501 |
On Cold Pool Collisions in Tropical Boundary Layers | |
Torri, Giuseppe1; Kuang, Zhiming2,3 | |
2019-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:1页码:399-407 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Collisions between cold pools are generally acknowledged to be important processes through which new convective cells are triggered. Yet relatively little has been done to characterize these processes in detail, quantify their impact on the life cycle of cold pools, and include them in convective parameterizations. We use a combination of Eulerian and Lagrangian models to investigate how much cold pools are affected by collisions. Results from simulations in radiative-convective equilibrium suggest that collisions represent a first-order process in the dynamics of cold pools, the median time of first collision being under 10min since cold pool birth. Through a Lagrangian tracking algorithm, it is also shown that cold pools are significantly deformed by collisions and lose the circular shapes they would have if in isolation only a few minutes after birth. Finally, it is suggested that cold pools happen in clusters, and associated spatial and temporal scales are presented. Plain Language Summary While collisions between cold pools are known to be key processes in the formation of new convective clouds, they are overlooked by many studies and most parameterizations. We find that collisions have a significant impact on the life and the dynamics of cold pools, affecting their propagations in the boundary layer already few minutes after their birth. Contrary to many conceptual models, our results suggest that cold pools lose circular symmetry already when still young. Finally, we show that cold pools are not randomly distributed in space and time but tend to appear in clusters. |
英文关键词 | cold pools deep convection tropical meteorology Lagrangian model boundary layer gravity currents |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456938600044 |
WOS关键词 | INTERACTING THUNDERSTORM OUTFLOWS ; DENSITY CURRENTS ; GUST FRONTS ; CONVECTION ; SIMULATION ; PARAMETERIZATION ; INITIATION ; AGGREGATION ; CONVERGENCE ; FORMULATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/28712 |
专题 | 气候变化 |
作者单位 | 1.Univ Hawaii Manoa, Dept Atmospher Sci, Honolulu, HI 96822 USA; 2.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 3.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Torri, Giuseppe,Kuang, Zhiming. On Cold Pool Collisions in Tropical Boundary Layers[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(1):399-407. |
APA | Torri, Giuseppe,&Kuang, Zhiming.(2019).On Cold Pool Collisions in Tropical Boundary Layers.GEOPHYSICAL RESEARCH LETTERS,46(1),399-407. |
MLA | Torri, Giuseppe,et al."On Cold Pool Collisions in Tropical Boundary Layers".GEOPHYSICAL RESEARCH LETTERS 46.1(2019):399-407. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论