| 摘要: |
| 用一个全球谱模式作数值试验,研究了1979年6月中旬一次西太平洋副热带高压西伸北进的中期天气过程中热带西太平洋地区理想热源的作用。结果表明:理想热源的作用大约在4天以后可以影响我国东部的副热带高压和中高纬度的环流;理想热源在热带洋面上产生的扰动首先沿副高南边的东风气流向西北方向传播,到中纬西风带后分为两支,一支继续向西北方向传播,另一支转向东北偏东方向传播,两支扰动的共同作用,导致了副热带高压和西风带环流的变化。 |
| 关键词: 数值试验 副热带高压 热带西太平洋 理想热源 扰动 |
| DOI： |
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| THE NUMERICAL EXPERIMENT OF THE MEDIUM RANGE CHANGE OF THE SUBTROPICAL HIGH Ⅱ.THE INFLUENCE OF THE HEAT SOURCE OVER TROPICAL WESTERN PACIFIC |
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Gong Yuanfa1, Ji Liren2
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1.Chengdu Institute of Meteorology, Chengdu, 610041;2.Institute of Atmospheric Physics, Chinese Academy of Science
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| Abstract: |
| The medium-range changes of the subtropical high of June,1979 as influenced by ideal heat sources over the tropical western Pacific are studied using a global circulation spectral model.The analyses of the simulation results show that the subtropical high and mid high latitude circulation systems of the eastern China are changed by the ideal heat source 4 days after inclusion.In the easterlies south of the subtropical high,the disturbance is produced,propagated to the northwest at first.Then,this disturbance branch off into two parts in the westerlies,one still propagating to northwest,another changing into the eastnortheast direction in the westerlies stream of the north of the subtropical high.Owing to the influences of the two disturbances,the subtropical high and westerly system are changed. |
| Key words: Numerical experiment Subtropical high Tropical western Pacific Ideal heat source Disturbance |
