| 摘要: |
| 对一次强冷空气伴随的近海大风天气进行了分析,研究了强冷空气影响过程中地面变压场和高空各层温度平流场的演变特征及其与地面风场之间的关系,在此基础上对强冷空气引发江苏近海强风形成与发展的物理过程进行了探讨,研究表明:温度平流与地面风场之间是通过变压场相互关联和促进的,强冷空气所伴随的冷平流增强了地面变压场及变压梯度,是导致江苏近海大风出现的重要原因。 |
| 关键词: 冷空气 近海大风 温度平流 变压场 |
| DOI： |
| 分类号: |
| 基金项目:江苏省重大科技项目(BS2006086)资助 |
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| DISCUSSION OF PHYSICAL MECHANISMS FOR A GALE PROCESS CAUSED BY SEVERE COLD AIR OFFSHORE JIANGSU |
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WU Hai-ying, SUN Yan, ZENG Ming-jian, YIN Dong-ping, SHEN Shu-qin
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Jiangsu Provincial Meteorological Observatory, Nanjing 210008, China
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| Abstract: |
| A gale process accompanied by severe cold air in offshore of Jiangsu Province was analyzed in this paper and the relationships of wind field with evolution characteristics of surface allobaric field and allobaric field and its gradient that were increased by the cold temperature advection resulted in the gale offshore of Jiangsu.temperature advection field on different hight levels were also studied.On the basis of the above study,we probed into the physical mechanism for the generation and development of the gale.It was showed that the surface allobaric field correlated high-level temperature advection with surface wind field and the surface |
| Key words: cold air offshore gale temperature advection allobaric field |
