论青藏高原中部的非绝热局地锋生

ON THE LOCAL DIABATIC FRONTOGENESIS IN THE CENTRAL PART OF QINGZANG GAOYUAN

中文摘要:

      本文通过实例分析表明,在34°N 附近由高原大地形引起的非绝热局地锋生,是一种基本的高原天气过程。进而指出,引用大尺度加热场的概念,可对一系列高原天气气候学现象作出适当的解释。例如高原上的锋系(特别是暖锋)、高原气旋(低涡)的发生发展、长江黄河的发源以及柴达木盆地的干旱等。文中指出,高原天气学中应当重视非绝热过程,地面分析也是一个亟待改进的问题。

英文摘要:

      In this paper some examples are given to show the fact that the large scale topography of the plateau exerts a basic influence on the local diabatic frontogenesis near 34°N. Adopting the concept of the large-scale heating field, one can find out suitable expression for a number of weather and climatic phenomena over the plateau, such as the frontal systems(especially, the warm fronts), the plateau cyclones(vortices), the origins of Chang Jiang and Huang He and the formation of Qaidam Pendi Desert. It is shown in this paper, that the diabatic process must be taken into account in the study of plateau meteorology and the surface analysis needs also to be improved urgently.