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大气科学  2006 

未来半个世纪江淮流域夏季降水变化趋势的数值模拟结果分析

DOI: 10.3878/j.issn.1006-9895.2006.01.13

Keywords: 全球增暖,降水,副热带高压,海表温度梯度

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Abstract:

基于政府间气候变化委员会(IPCC)排放情景特别报告(SRES)A2和B2温室气体排放方案下全球海气耦合模式模拟结果,分析了未来半个世纪中国江淮流域夏季降水变化趋势,发现江淮流域在经历21世纪开始10年降水偏多时期后,从2010年开始该地区将经历一段降水偏少的时期,在温室气体和SO2排放量较多的A2方案下,该时期将维持较长时间.这些地区夏季降水的减少与夏季西北太平洋副热带高压环流的减弱东撤有关,由此伴随这些地区夏季风和对流层中大气上升运动的减弱,而西北太平洋副热带高压环流的减弱东撤与北太平洋海表面南高北低的温度梯度的减小有关.

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