Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0129.1 |
Universality in the Spatial Evolution of Self-Aggregation of Tropical Convection | |
Windmiller, Julia M.1,2; Craig, George C.1 | |
2019-06-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:6页码:1677-1696 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Self-aggregation in numerical simulations of tropical convection is described by an upscale growth and intensification of dry and moist regions. Previous work has focused on determining the relevant mechanism that induces moist regions to get moister and dry regions to get drier. Though different mechanisms have been identified, the spatial evolution of self-aggregation is remarkably universal. The first part of this study shows that different mechanisms can lead to a similar evolution of self-aggregation, if self-aggregation is described by a phase separation of moist and dry regions, through a process called coarsening. Though it was previously introduced based on a convection-humidity feedback, coarsening, importantly, is not tied to a specific feedback process but only requires an intensification of local humidity perturbations. Based on different feedback loops, three simple models of the evolution of the humidity field are introduced, all of which lead to coarsening. In each model, diffusive transport of humidity is assumed, which approximates a humidity increase due to convection, within a finite region around convective cores. In the second part, predictions made by coarsening are compared with atmospheric model simulations. Analyzing a set of radiative-convective equilibrium simulations shows that coarsening correctly predicts the upscale growth of the moist and dry regions in the early stages of self-aggregation. In addition, coarsening can explain why self-aggregation is not observed for small domains and why the shape of the final moist region changes with the shape of the domain. |
英文关键词 | Atmosphere Tropics Deep convection Nonlinear dynamics Radiative-convective equilibrium |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000470676900002 |
WOS关键词 | DIABATIC PROCESSES ; WATER-VAPOR ; EQUILIBRIUM ; TEMPERATURE ; SENSITIVITY ; EXPLICIT ; ARRIVAL ; HEIGHT ; MODEL ; SCALE |
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/183881 |
专题 | 地球科学 |
作者单位 | 1.Ludwig Maximilians Univ Munchen, Munich, Germany; 2.Max Planck Inst Meteorol, Hamburg, Germany |
推荐引用方式 GB/T 7714 | Windmiller, Julia M.,Craig, George C.. Universality in the Spatial Evolution of Self-Aggregation of Tropical Convection[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(6):1677-1696. |
APA | Windmiller, Julia M.,&Craig, George C..(2019).Universality in the Spatial Evolution of Self-Aggregation of Tropical Convection.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(6),1677-1696. |
MLA | Windmiller, Julia M.,et al."Universality in the Spatial Evolution of Self-Aggregation of Tropical Convection".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.6(2019):1677-1696. |
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