高山冰川作用区局地环流和气温分析

A Study on Local Circulation and Temperature in Alpine Glaciated Area

本文通过西昆仑山崇侧冰川区的观测资料,揭示了冰川区和非冰雪区风向风速,气温的日变化以及它们在垂直和水平方向的演变。结果表明,这里盛行来自冰川区的风,在冰川区与非冰川区之间风向有明显的切变,并形成一些小的辐合辐散区。而且,冰雪区全天均为绝热稳定区,非冰雪区白天为绝热不稳定状态,夜晚存在逆温现象。水平方向温度差主要发生在冰雪区前缘地带,进而提出了冰川区特有的现象——冰川锋。

Based on measuring data from Chongce ice cap area of West Kunlun Mountains, the daily variation of wind direction, wind speed and air temperature in the glacial and non-glacierized area as well as their variation of temperature on horizontal and vertical direction were revealed. The results show that the wind from the glacier region is prevailing and there are wind shear, convergence and divergence zones between the glacial and the non-glacierized area. The atmospheric-superadiabatic stable state occurred in the glacial region for all day, but in the non-glacierized area the atmospheric superadiabatic unstable state occurred in daytime, and a phenomen on of inverse temperature in nighttime. Therefore, the variation of temperature on horizontal direction occurred mainly in the front of the ice / snow region. So we suggest a specific phenome on 'the glacier front' in the glacial area.