朱抱真. 1964. 大地形和热源的动力控制与超长波活动关系的初步研究[J]. 气象学报, 34(3):285-298, doi:10.11676/qxxb1964.030
大地形和热源的动力控制与超长波活动关系的初步研究
A PRELIMINARY STUDY ON THE ACTIVITIES OF ULTRA-LONG WAVES IN RELATION TO THE DYNAMIC CONTROL OF LARGE-SCALE OROGRAPHY AND HEAT SOURCES
投稿时间:1963-10-16  修订日期:1964-05-01
DOI:10.11676/qxxb1964.030
中文关键词:  
英文关键词:
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作者单位
朱抱真 中国科学院地球物理研究所 
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中文摘要:
      考虑静力稳定度在垂直方向上的不均匀性,给出一个简单的讨论对流层中层、平流层下层运动的一参数模式。在线性化下研究了大地形和热源对超长波活动的控制作用: (1)地形和热源可使超长波在固定的地理区域摆动和加深,说明一些大槽和阻塞高压易于在一定的地区维持。(2)超长波振幅变化存在10—30天的周期,长短决定于大气运动的尺度、结构和地球自转。(3)在一定的大气参数保持不变的情况下,扰动在极长时间中建立了定常状态。计算表明,在对流层中层所观测到的平均槽脊正是地形和热源所造成的定常超长波系。
英文摘要:
      Utilizing a simple theoretical model, some dynamic processes of ultra-long waves in the troposphere as well as in the stratosphere are studied in relating to the heating and orographic influences.Owing to the existance of both orographic and thermal factors, the ultra-long waves fluctuate and intensify about a certain geographical location, this may explain the maintenance of quasi-stationary large troughs in the mid-troposphere.It is also found that the amplitude of ultra-long waves varies periodically with a period of 10-30 days, and Further that the period depends upon the scale of motion and the structure of circulation.When the parameters of the atmosphere remain unchanged in an unlimited time, the field of motion tends to become steady.
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