南极瑞穗站雪面热量平衡特征

利用南极瑞穗站(日本)1979年近地面层微气象资料及净辐射、本站气压等资料进行了统计分析。采用鲍文比-能量平衡法求得月平均感热通量和潜热通量,采用热含法计算得出月平均雪面热通量,使用了直接测量的净辐射通量,研究了该站雪面热量平均特征。其中突出的特征是3—12月雪面净辐射值为负值,主要靠感热通量由大气向雪面补充热量。将本文结果与苏联少先队站1956年的结果进行了比较,得出相当一致的年变化规律。最后,得出瑞穗站雪面为一强冷源。

The characteristics of heat balance on the snow surface at Mizuho Station in Antarctica

In this paper, the data of the micrometeorology near the surface, the net radiation and the local pressure at Mizuho Station in Antarctica(1979) are analysed. The monthly average values of sensible and latent heat fluxes are calculated with Bowen ratio-energy budget method. The monthly average heat flux on the snow surface is studied. The heat budget on the snow surface is estimated directly using the net radiation flux. The obvious characteristic is that the value of the net radiation on the snow surface is negative from March to December. The supplement of the heat is obtained according to the sensible heat flux from the air to the snow surface. It can be concluded that the snow surface at Mizub(?) station is a strong cold source.