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DOI | 10.1029/2019GL083805 |
Convective Heating Leads to Self-Aggregation by Generating Available Potential Energy | |
Yang, Da | |
2019-09-30 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | The moisture-entrainment-convection (MEC) feedback posits that a moist environment favors deep convection, which further moistens the atmosphere through its associated circulation and detrainment. The MEC feedback has been proposed to be crucial to spontaneous convective aggregation. Here we test this hypothesis by performing minimal cloud-resolving simulations, without the buoyancy effect due to water vapor, evaporation of rain, or radiative and surface-flux feedbacks. Convection can self-aggregate in this minimal simulation, in which the MEC feedback is active. We then switch off this feedback by relaxing moisture to its horizontal mean over a time scale of 3 hr. Convection still self-aggregates in this mechanism-denial experiment, suggesting that the MEC feedback is not essential to self-aggregation. We further show that convective heating coincides with positive temperature anomalies, generating available potential energy. Therefore, we propose that this convective heating-overturning circulation feedback can lead to spontaneous development of large-scale circulations. |
英文关键词 | convective organization radiative convective equilibrium entrainment convective heating |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000492450100001 |
WOS关键词 | VERTICAL WIND SHEARS ; TROPICAL CONVECTION ; SCALE ; PRECIPITATION ; ORGANIZATION ; EQUILIBRIUM ; CLIMATE ; MODEL |
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/187154 |
专题 | 气候变化 |
作者单位 | Univ Calif Davis, Davis, CA 95616 USA |
推荐引用方式 GB/T 7714 | Yang, Da. Convective Heating Leads to Self-Aggregation by Generating Available Potential Energy[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Yang, Da.(2019).Convective Heating Leads to Self-Aggregation by Generating Available Potential Energy.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Yang, Da."Convective Heating Leads to Self-Aggregation by Generating Available Potential Energy".GEOPHYSICAL RESEARCH LETTERS (2019). |
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