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青藏高原加热与南海季风爆发

Effects of the Heating of the Tibetan Plateau on the Onset of the East Asian Summer Monsoon

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【作者】 江宁波罗会邦

【Author】 Jiang Ningbo Luo Huibang

【机构】 中山大学大气科学系

【摘要】 各季节青藏高原地面的感热加热相对周围地区强烈的辐射冷却而言始终是个热源.地面向上的感热输送是高原大气热源的主要贡献者(干对流输送),但在雨季潜热的贡献同样重要.东亚季风爆发时高原东南部地区对流层大气爆发性增暖的主要原因是高原东南部的非绝热加热作用;而这种增暖使得高原东部以南的温度梯度改变,从而导致风压场的调整——东亚季风爆发

【Abstract】 Based on the past studies on the relationship between the heating of the Tibetan Plateau and the onset of the East Asian monsoon,a review was given in this paper as part of the preparation task of the coming SCS MONEX.The air above the Plateau is a relative heat source in all seasons compared with the air over the surrounding areas at the same level and the same latitude.The major souce of the heating above the Plateau is provided by the sensible heat transports with the mechanism of the dry thermal convection rising from the heated plateau surface,which produces the tropospheric heating over the Plateau.But the contribution from the precipitation is also important in the rainy season when the cumulus convection plays a significant role in the heating over the southeastern Plateau.The diabatic heating over the eastern Plateau is the primary cause of mid May atmospheric warming from the eastern Plateau to the centrl China Plain,which leads to the reversal of the meridional temperature gradient of the troposphere east of 80°E,which results in the commencement of the East Asian monsoon.

【关键词】 热源季风爆发青藏高原南海
【Key words】 eat sourcesonset of monsoonTibetan PlateauNanhai
  • 【文献出处】 中山大学学报(自然科学版) ,ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI , 编辑部邮箱 ,1996年S1期
  • 【分类号】P425.42(667)
  • 【被引频次】12
  • 【下载频次】161
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