| DOI: | 10.1002/grl.50204
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| 论文题名: | Convective self-aggregation, cold pools, and domain size |
| 作者: | Jeevanjee N.; Romps D.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9251
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| EISSN: | 1944-8982
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| 出版年: | 2013
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| 卷: | 40, 期:5 | | 起始页码: | 994
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| 结束页码: | 998
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| 语种: | 英语
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| 英文关键词: | Atmospheric Models
; Cloud-Resolving Models
; Convection
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| Scopus关键词: | Atmospheric model
; Cloud resolving model
; Cloud-resolving simulation
; Critical threshold
; Dry patches
; Self aggregation
; Sharp transition
; Streamfunctions
; Earth sciences
; Geophysics
; Heat convection
; Lakes
; aggregation
; boundary layer
; convection
; domain structure
; moisture
; simulation
; streamflow
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| 英文摘要: | Convective self-aggregation refers to a phenomenon in cloud-resolving simulations wherein the atmosphere spontaneously develops a circulation with a convecting moist patch and a nonconvecting dry patch. All previous studies have found a sharp transition to aggregated convection when the domain size exceeds a critical threshold, typically in the range of 200-300 km. Here, we show that cold pools are responsible for this sharp transition. When cold pools are inhibited, self-aggregation occurs at all domain sizes. In this case, the aggregation strength decreases smoothly as the domain size L is decreased below about 200-300 km. A streamfunction analysis reveals two distinct sources for the air subsiding into the dry-patch boundary layer: a moist, shallow circulation and a dry, deep circulation. The deep circulation scales with L, whereas the shallow circulation does not. At small L, the shallow circulation dominates, thereby weakening the aggregation. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876798976&doi=10.1002%2fgrl.50204&partnerID=40&md5=378f2bcfe54592fde8f2b0c5817dfde7
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6515
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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| Recommended Citation: | |
Jeevanjee N.,Romps D.M.. Convective self-aggregation, cold pools, and domain size[J]. Geophysical Research Letters,2013-01-01,40(5).
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