羌塘高原东部冰川发育的水汽来源探讨

选取4座地处青藏高原腹地羌塘高原东部的雪山,其中山脊线呈南北走向者,东坡冰川较西坡更为发育;山脊线呈东西走向者,南坡冰川面积大于北坡.雪山各朝向冰川面积的统计数值也表现为:南向及东南向冰川最为发育.统计坐落于羌塘高原的11座雪山的平均雪线,其高度变化表现为:纬线方向上,88°E以西的同纬度雪山的雪线高度基本相同,88°E以东雪线高度快速下降;经线方向上,雪线从南到北先略微升高后又降低.这些地形学信息表明,羌塘高原东部地区冰川发育的水汽来源于东南方向,即西南季风穿过横断山脉为羌塘高原东部冰川的发育提供降水.

Discussing Sources of Moisture Feeding the Glaciers on the Eastern Qangtang Plateau

In this paper,four mountains in the interior of the Tibetan Plateau were researched with geomorphological methods.Among the four mountains,those with ridges from south to north have glaciers well developed on the east slopes,and those with ridges from west to east have glaciers well developed on the south slopes.Furthermore,glaciers with south and east aspects occupy much more area.Along the latitudinal direction,altitude of snowline is almost the same in the west of 88° E,but decreases sharply from west to east in the east of 88° E.Along the longitudinal direction,altitude of snowline first increases and then decreases from south to north.All the information indicates that moisture feeding the glaciers in the east of Qangtang Plateau comes from the southeast by the Indian monsoon.