| 大气静力稳定度的铅直分布和不同风速铅直廓线对天气系统发展的影响 |
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| 引用本文： | 萧永生.大气静力稳定度的铅直分布和不同风速铅直廓线对天气系统发展的影响[J].气象学报,1984,42(3):279-289. |
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| 作者姓名： | 萧永生 |
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| 作者单位： | 安徽省气象科学研究所 |
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| 摘 要： | 采用一个准地转三层模式,对于高低空不同层结及不同风速铅直廓线下的斜压不稳定性问题进行了分析和讨论。指出:(1)大气层结特征对斜压不稳定的影响不仅表现在对不稳定临界波长和临界风速切变的制约上,而且其铅直分布的不均一性决定了大气的各个层次对斜压不稳定的贡献大小;扰动的斜压发展主要取决于静力稳定度较小的那些层次内的热力、动力学条件,在这些层次内,扰动也最为明显。(2)高低空风速比中空为大的“高低空强风型”风速铅直分布最有利于扰动的不稳定发展,在这种风速铅直廓线下,不稳定波波谱较宽,不稳定波临界波长和最不稳定波波长也较短。
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| 收稿时间： | 1982/5/14 0:00:00 |
| 修稿时间： | 1983/6/24 0:00:00 |
THE EFFECTS OF VERTICAL STRATIFICATION OF TEMPERATURE AND OF VERTICAL WIND SHEAR ON THE DEVELOPMENT OF SYNOPTIC SYSTEMS |
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| Xiao Yongsheng.THE EFFECTS OF VERTICAL STRATIFICATION OF TEMPERATURE AND OF VERTICAL WIND SHEAR ON THE DEVELOPMENT OF SYNOPTIC SYSTEMS[J].Acta Meteorologica Sinica,1984,42(3):279-289. |
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| Authors: | Xiao Yongsheng |
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| Institution: | Meteorological Institute of Anhui Province |
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| Abstract: | Using a quasi-geostrophic three layer baroclinic model, the baroclinic instability in different vertical stratification of temperature and in different vertical wind shear conditions are discussed and analysed. It is found that not only the stratification of atmosphere defines the critical wavelength of instable waves, but also its vertical difference determines the contribution to The baroclinic instability (in each level) the baroclinic development of small perturbations depends primarily on thermal and dynamical conditions in layers with smaller static stability. It is also found that the wind is stronger in high and low levels, it is. most favourable in the develepment of instable disturbances. |
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