梁潇云
,刘屹岷,吴国雄
. 2005. 青藏高原对亚洲夏季风爆发位置及强度的影响[J]. 气象学报, 63(5):799-805, doi:10.11676/qxxb2005.076 |
青藏高原对亚洲夏季风爆发位置及强度的影响 |
EFFECT OF TIBETAN PLATEAU ON THE SITE OF ONSET AND INTENSITY OF THE ASIAN SUMMER MONSOON |
投稿时间:2005-09-12 修订日期:2005-09-15 |
DOI:10.11676/qxxb2005.076 |
中文关键词: 青藏高原,亚洲夏季风,爆发地点,热力滑轮 |
英文关键词:Tibetan Plateau, Asian summer monsoon, Site of onset, Heat pulley. |
基金项目:中国科学院创新团队国际合作伙伴计划“气候系统模式研发及应用研究”,国家自然科学基金项目(40475027,40135020,40221503和40375022) |
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中文摘要: |
通过数值模拟,研究了青藏高原位于不同经度位置时,亚洲夏季风的爆发和演变情况,从动力和热力学角度分析了青藏高原大地形对亚洲夏季风爆发位置的影响。结果表明,青藏高原的“热力滑轮”作用引起:高原东南面热带陆地上空的偏南气流加强,降水增加,凝结潜热加强;高原西南面热带陆地上空出现偏北气流,降水减弱,陆面的感热加热加强。青藏高原对于亚洲夏季风的爆发地点有锚定的作用,在热带海陆分布的背景下,使亚洲夏季风首先在高原东南面的海洋东岸—陆地西岸爆发,并使亚洲季风降水重新分布。 |
英文摘要: |
Based on experiments in different longitudes of the Tibetan Plateau, it is found that the Tibetan Plateau makes a heat pulley function on its surrounding areas in late spring and summer. The function always enhances southerlies and brings heavy rainfall and more latent heating over tropical land to southeast of the Tibet, prevail northerlies, less rainfall and more sensible heating over tropical land to southwest of the Tibet. Therefore, the onset of Asian summer monsoon often takes place on the eastern shore of sea lies to the south of the Tibetan Plateau. These show that the Tibetan Plateau anchor the onset site of Asian summer monsoon. Results also show that the existence of Tibetan Plateau modulates the Asian monsoon, and make the Asian summer rainfall to redistribute. |
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