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DOI | 10.1029/2018GL081817 |
Convective Self-Aggregation As a Cold Pool-Driven Critical Phenomenon | |
Haerter, Jan O. | |
2019-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:7页码:4017-4028 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark |
英文摘要 | Convective self-aggregation is when thunderstorm clouds cluster over a constant temperature surface in radiative convective equilibrium. Self-aggregation was implicated in the Madden-Julian Oscillation and hurricanes. Yet, numerical simulations succeed or fail at producing self-aggregation, depending on modeling choices. Common explanations for self-aggregation invoke radiative effects, acting to concentrate moisture in a subdomain. Interaction between cold pools, caused by rain evaporation, drives reorganization of boundary layer moisture and triggers new updrafts. We propose a simple model for aggregation by cold pool interaction, assuming a local number density rho(r) of precipitation cells, and that interaction scales quadratically with rho(r). Our model mimics global energy constraints by limiting further cell production when many cells are present. The phase diagram shows a continuous phase transition between a continuum and an aggregated state. Strong cold pool-cold pool interaction gives a uniform convective phase, while weak interaction yields few and independent cells. Segregation results for intermediate interaction strength. |
英文关键词 | self-aggregation convection cloud thunderstorm critical phenomenon phase transition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465836200048 |
WOS关键词 | VERTICAL WIND SHEARS ; TROPICAL CONVECTION ; WATER-VAPOR ; ORGANIZATION |
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/182396 |
专题 | 气候变化 |
作者单位 | Univ Copenhagen, Niels Bohr Inst, Copenhagen, Denmark |
推荐引用方式 GB/T 7714 | Haerter, Jan O.. Convective Self-Aggregation As a Cold Pool-Driven Critical Phenomenon[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(7):4017-4028. |
APA | Haerter, Jan O..(2019).Convective Self-Aggregation As a Cold Pool-Driven Critical Phenomenon.GEOPHYSICAL RESEARCH LETTERS,46(7),4017-4028. |
MLA | Haerter, Jan O.."Convective Self-Aggregation As a Cold Pool-Driven Critical Phenomenon".GEOPHYSICAL RESEARCH LETTERS 46.7(2019):4017-4028. |
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