Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076640 |
Estimating Bulk Entrainment With Unaggregated and Aggregated Convection | |
Becker, Tobias1; Bretherton, Christopher S.2,3; Hohenegger, Cathy1; Stevens, Bjorn1 | |
2018-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:1页码:455-462 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA |
英文摘要 | To investigate how entrainment is influenced by convective organization, we use the ICON (ICOsahedral Nonhydrostatic) model in a radiative-convective equilibrium framework, with a 1 km spatial grid mesh covering a 600 by 520 km(2) domain. We analyze two simulations, with unaggregated and aggregated convection, and find that, in the lower free troposphere, the bulk entrainment rate increases when convection aggregates. The increase of entrainment rate with aggregation is caused by a strong increase of turbulence in the close environment of updrafts, masking other effects like the increase of updraft size and of static stability with aggregation. Even though entrainment rate increases with aggregation, updraft buoyancy reduction through entrainment decreases because aggregated updrafts are protected by a moist shell. Parameterizations that wish to represent mesoscale convective organization would need to model this moist shell. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423431800051 |
WOS关键词 | SHALLOW CUMULUS CONVECTION ; HIGH-RESOLUTION SIMULATION ; LARGE-EDDY SIMULATION ; CLIMATE SENSITIVITY ; SELF-AGGREGATION ; MOIST CONVECTION ; MODEL ; PARAMETERIZATION ; ORGANIZATION ; EQUILIBRIUM |
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/25596 |
专题 | 气候变化 |
作者单位 | 1.Max Planck Inst Meteorol, Hamburg, Germany; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Univ Washington, Dept Appl Math, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Becker, Tobias,Bretherton, Christopher S.,Hohenegger, Cathy,et al. Estimating Bulk Entrainment With Unaggregated and Aggregated Convection[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(1):455-462. |
APA | Becker, Tobias,Bretherton, Christopher S.,Hohenegger, Cathy,&Stevens, Bjorn.(2018).Estimating Bulk Entrainment With Unaggregated and Aggregated Convection.GEOPHYSICAL RESEARCH LETTERS,45(1),455-462. |
MLA | Becker, Tobias,et al."Estimating Bulk Entrainment With Unaggregated and Aggregated Convection".GEOPHYSICAL RESEARCH LETTERS 45.1(2018):455-462. |
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