| 环境场对边界层低空急流形成的影响 |
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| 引用本文： | 罗德海.环境场对边界层低空急流形成的影响[J].热带气象学报,1987,0(3):227-232. |
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| 作者姓名： | 罗德海 |
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| 作者单位： | 中国科学院大气物理研究所 |
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| 摘 要： | 本文利用两层流的浅水波模式,讨论了环境场对边界层低空急流形成的影响,并得到了边界层低空急流的特征宽度为L0=(ρ2-ρ1)/(ν2ρ2-ρ1ν1)L0*C0*,式中C0*=√gh2, L0*=C0*/f为Rossby变形半径,ρ1,p2和v1,v2分别为上下两层大气的密度和大尺度经向地转风,H2为低层大气的厚度,g为重力加速度,f为柯氏参数,当高低层大气中的大尺度经向地转风的垂直切变越强时,所形成的中尺度边界层低空急流就越强;当低层大气中的温度增高和湿度增大、并且低层大气中的大尺度经向地转风越强、高度越低时,越有利于形成边界层低空急流。
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| 收稿时间： | 1986/8/29 0:00:00 |
| 修稿时间： | 1986/11/29 0:00:00 |
EFFECT OF ENVIRONMENTAL CONDITION ON THE BOUNDARY LAYER LOW-LEVEL JET |
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| Luo de Hai.EFFECT OF ENVIRONMENTAL CONDITION ON THE BOUNDARY LAYER LOW-LEVEL JET[J].Journal of Tropical Meteorology,1987,0(3):227-232. |
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| Authors: | Luo de Hai |
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| Institution: | Institute of Atmospheric physics, academia sinica |
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| Abstract: | In this paper, the shallow water wave model is used to discuss the effect of environmental condition on boundary layer low-level jet and it is obtained thatthe scale of the boundary layer low-level jet is L0=(ρ2-ρ1)/(ν2ρ2-ρ1ν1)L0*C0*.Startingfrom this formula, we have concluded that it is advantaged to establish the stronger boundary layer low-level jet in the large scale geostrophic current with stronger vertical shear and high temperature and wet in the low layer atmosphere, while geostrophic wind is stronger and its height is lower, the stronger boundary layer low-level jet may be established. |
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