| 用10层准拉格朗日有限区域模式对高原东侧锋生过程的数值模拟 |
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| 引用本文： | 赵思雄.用10层准拉格朗日有限区域模式对高原东侧锋生过程的数值模拟[J].大气科学,1991,15(5):40-50. |
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| 作者姓名： | 赵思雄 |
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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： | 本文对一次引起夏季华北暴雨的锋生过程进行了研究。在诊断分析的基础上,我们采用十层准拉格朗日有限区域模式对此个例进行了48小时的模拟,并对模拟输出结果进行解释与再次诊断。表明:(1)夏季高原东侧有时两支气流交绥很清楚,温度对比明显,与梅雨锋的情况很不相同,这在夏末尤其如此。这种温度对比区虽比冬季弱,但是,与夏季天气系统的发展及降水是有关系的。(2)模拟结果与实际观测资料是很相似的,再现了两支气流形成切变线的三维结构、移动与演变,并模拟出了在对流层中存在着深厚的24小时变温区;模拟发现,一条东北-西南向的锋生
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| 关 键 词： | 中尺度 数值预报 锋生 |
Numerical Simulation of Frontogenetical Process of the East of the Tibetan Plateau by Quasi-Lagrangian Limited Area Model |
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| Zhao Sixiong.Numerical Simulation of Frontogenetical Process of the East of the Tibetan Plateau by Quasi-Lagrangian Limited Area Model[J].Chinese Journal of Atmospheric Sciences,1991,15(5):40-50. |
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| Authors: | Zhao Sixiong |
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| Abstract: | A frontogenetical process of OOGMT 15- 00GMT 17 August, 1981 has been discussed. Results are summarized as follows. (1 )During this period, cold air invaded North China from middle-high latitudes and, at the same time.the warm air originating from the SE of the Tibetan Plateau already extended Northwards and reached the Korean Peninsula by OOGMT 17 August. Strong interaction between cold and warm air occurred in North China, then, a cold front formed and intensified. This situation is quite different from Baiu front. (2) A ten - level quasi - lagrangian limited area numerical model with terra in of the Tibetan Plateau was used to simulate the process successfully. In our experiments, different schemes of terrains and lateral boundary conditions were tested. It is shown that the results of simulation experiments are very sensitive to some schemes .( 3 ) Frontogenetical function, F-d/ dt , was calculated at different standard pressure surfaces, respectively. It is found that the maxima of frontogenetical function appeared ahead of the trough at 700 hPa and the deformation term of frontogenetical function probably contributes greatly to the development of mesoscale systems near frontal zone in North China. |
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| Keywords: | Mesoscale system Numerical weather prediction Frontogenesis |
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