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DOI | 10.1175/JAS-D-18-0023.1 |
Why Does Deep Convection Have Different Sensitivities to Temperature Perturbations in the Lower versus Upper Troposphere? | |
Tian, Yang1; Kuang, Zhiming1,2 | |
2019 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:1页码:27-41 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Previous studies have documented that deep convection responds more strongly to above-the-cloud-base temperature perturbations in the lower troposphere than to those in the upper troposphere, a behavior that is important to the dynamics of large-scale moist flows, such as convectively coupled waves. A number of factors may contribute to this differing sensitivity, including differences in buoyancy, vertical velocity, and/or liquid water content in cloud updrafts in the lower versus upper troposphere. Quantifying the contributions from these factors can help to guide the development of convective parameterization schemes. We tackle this issue by tracking Lagrangian particles embedded in cloud-resolving simulations within a linear response framework. The results show that both the differences in updraft buoyancy and vertical velocity play a significant role, with the vertical velocity being the more important, and the effect of liquid water content is only secondary compared to the other two factors. These results indicate that cloud updraft vertical velocities need to be correctly modeled in convective parameterization schemes in order to properly account for the differing convective sensitivities to temperature perturbations at different heights of the free troposphere. |
英文关键词 | Clouds Convection Entrainment Mass fluxes transport Vertical motion Waves atmospheric |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453367600003 |
WOS关键词 | SHALLOW CUMULUS CONVECTION ; PART I ; STRATIFORM INSTABILITY ; ENTRAINMENT ; PARAMETERIZATION ; ENSEMBLE |
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/29318 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Tian, Yang,Kuang, Zhiming. Why Does Deep Convection Have Different Sensitivities to Temperature Perturbations in the Lower versus Upper Troposphere?[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(1):27-41. |
APA | Tian, Yang,&Kuang, Zhiming.(2019).Why Does Deep Convection Have Different Sensitivities to Temperature Perturbations in the Lower versus Upper Troposphere?.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(1),27-41. |
MLA | Tian, Yang,et al."Why Does Deep Convection Have Different Sensitivities to Temperature Perturbations in the Lower versus Upper Troposphere?".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.1(2019):27-41. |
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