摘要
贡嘎山5000m以上山体面积占全区总面积的六分之一,这样高大的山体为冰川发育提供了有利的地势条件和宽阔的积累区。同时,据观测推算东坡冰川积累区的年降水量可达3000mm,雪线处的年平均气温在-4.1—-5℃;西坡冰川积累区的年降水量达1800mm,为本区冰川发育提供了丰富的冰雪物质条件和必要的低温。冰川形态类型基本齐全,冰川分布比较集中,但东西坡冰川在规模上有明显差异,东坡冰川条数虽然较西坡少,但冰川规模较东坡大,冰川雪线和冰舌下伸高度也较西坡低。
Lying at the southeastern margin of the Tibetan Plateau, the Gongga Mts., with 1 / 6 the whole area above 5 000 m a.s.l. is situated at the middle section of the Daxueshan Mts. where the highest peak is up to 7 514 m a.s.l.. Based on meteorological observation, the precipitation in the accumulation area is estimated to be about 3 000 mm each year and the annual airtemperature is about -4.1--5.1℃ at the equilibrium line on the east slope of themountains, while the annual precipitation on the west slope is 1 800 mm in the accumulation area. Such an aboundant accumulation and necessarily lower temperature are prefitable to glacier development.There are 74 glaciers with a total area of 255.1 square km around the Gongga Mts. where different glaciers types can be found. Though glaciers are relatively concentrated, the difference in scale is most obvious. Glaciers on east slope are less than those on the west, but glaciers on the east slope are larger than those on the west, Moreover the snow line altitudes and glacier fronts on the east slope extend to lower altitudes than those on the west.
出处
《冰川冻土》
CSCD
北大核心
1993年第4期551-558,共8页
Journal of Glaciology and Geocryology
关键词
冰川
发育条件
雪线
贡嘎山
Glacier development condition, glacier distribution, glacier shape type, snowline, Gongga Mountains
