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大气科学  2005 

塔里木盆地中的大气环流及沙尘暴成因探讨--根据沙漠风积地貌和气象观测重建的风场

DOI: 10.3878/j.issn.1006-9895.2005.04.14

Keywords: 塔克拉玛干沙漠,风积地貌,大气环流,沙尘暴,辐合上升区

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Abstract:

沙漠风积地貌的形态可反映风向的长期变化,作者通过对塔克拉玛干沙漠风积地貌形态所揭示的风向及盆地边缘气象站40年的风况分析和合并,重建了盆地中沙尘暴形成时的风场.在分析冷空气入侵塔里木盆地的路径、盆地中不同时期热力状况的基础上,从大气环流的角度探讨了盆地中沙尘暴的成因.结果表明,在暖季(春、夏),由于地面对大气感热加热作用强烈,形成了浅薄的热低压.当不同强度的冷空气入侵时,尽管风场有所不同,但都会分别在和田-于田-民丰一带、柯坪一带形成强大的辐合上升区,使这两个地区成为中国沙尘暴发生频率最

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