Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093316 |
How does LCL height influence deep convective updraft width? | |
J. P. Mulholland; J. M. Peters; H. Morrison | |
2021-06-30 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | Previous studies have hypothesized that the width of deep convection should positively scale with lifting condensation level (LCL) height. To evaluate this hypothesis, we analyzed idealized large-eddy simulations with varying LCL heights and initial warm bubble widths in unsheared environments with comparable convective available potential energy. For a given initial warm bubble width, simulations with higher LCLs result in wider, deeper, and stronger cloudy updrafts compared to simulations with lower LCLs. Rising dry thermals in higher LCL simulations experience longer residence times within the sub-cloud layer, and consequently entrain more conditionally unstable air and grow wider before reaching the LCL. The resulting cloudy updrafts are wider, deeper, and have faster vertical velocities because of a reduction in entrainment-driven dilution of buoyancy, relative to lower LCL simulations. These results confirm the hypothesized positive relationship between LCL height and deep convective updraft width, and provide a physical explanation for this relationship. |
领域 | 气候变化 |
URL | 查看原文 |
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/333862 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | J. P. Mulholland,J. M. Peters,H. Morrison. How does LCL height influence deep convective updraft width?[J]. Geophysical Research Letters,2021. |
APA | J. P. Mulholland,J. M. Peters,&H. Morrison.(2021).How does LCL height influence deep convective updraft width?.Geophysical Research Letters. |
MLA | J. P. Mulholland,et al."How does LCL height influence deep convective updraft width?".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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