极地研究

极地研究 ›› 1990, Vol. 2 ›› Issue (3): 1-10.

• 目次 •    下一篇

南极瑞穗高原1987—1988年度表面物质平衡及其变化

张文敬;山内恭   

  • 出版日期:1990-09-30 发布日期:1990-09-30

THE SURFACE MASS BALANCE AND ITS VARIABILITY IN THE MIZUHO PLATEAU, 1987-1988, ANTARCTIC

  • Online:1990-09-30 Published:1990-09-30

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摘要：

根据1987/1988年度表面物质积累资料,对Mizuho(瑞穗)高原该年度物质平衡的分布规律及其变化进行了讨论,同时还对年内短期天气过程及地形变化对物质平衡的影响进行了分析。研究发现1987/1988年度物质平衡的空间分布与多年平均状况存在较大区别:海拔550m以下的沿海地带表现为负物质平衡状态。从S_16点向内陆80km范围内为高值物质平衡区。年平均净物质平衡量达0.84m雪层深;80km到瑞穗高原内陆的瑞穗站之间为低值物质平衡区,年平均物质平衡量仅0.14m雪层深。在瑞穗高原,表面物质平衡水平表现为低积累,低支出的特征。此外,年内短期气候和地形变化对物质平衡的影响均大于多年平均状态,在高值物质平衡区,气候变化对物质平衡的影响大于地形变化的影响;而在低值物质平衡区,地形变化对物质平衡的影响则大于气候变化对物质平衡的影响。

关键词: 表面物质平衡;积累分布;瑞穗高原;南极

Abstract:

Base on the surface mass accumulation data in year of 1987/88, both distribution and variability of annual mass balance on Mizuho Plateau have been discussed. The authors also studied how they were influenced by means of shortterm climatic and topographical variations. It is found that there are some big differences between the year of 1987/88 and other years. In the region below 550 m a.s.l. which is near the coast, the mass balance appeared as negative. For the distance of 80 km from S16 to inland the annual net mass balance was 0.84 m snow depth. From 80 km point to Mizuho Station, it is considered as low mass balance zone with only 0.14 m snow depth. In Mizuho Pla-.teau, the level of massbalance appears to be as low accumulation and low expenditure. The influences of shortterm climatic and topographical variations to the mass balance were more heavy in this year than in other years. In the high accumulation zone, the influence of the shortterm climatical variation is greater than that of topographical one, while in the low value zone, the latter is greater than the former.