【摘要】 <正> 在中国西部山地中,博格达山脉是最早引起中外学者注意并进行考察的冰川区之一。本文是作者在前人工作的基础上,通过1959和1981年两度实地考察,并结合卫星象片和航空象片解译,对博格达峰现代冰川变化进行的初步探讨。 一、现代冰川发育过程及冰碛的形成时代 博格达峰地区共有113条现代冰川,分别位于南坡的古班博格达河、黑沟和阿克苏河,北坡的三工河、四工河、甘河子沟及白杨河等河流源头。这些冰川中的绝大多数是小冰更多还原

【Abstract】 On the basis of the standard tree ring sequence, it is pointed out that there were three stages of modern glaciation in Bogda area and the strongest falls on the second. The three modern end-moraines generally existing at the glacial termini were the products of the second and the third stages in the early 18th century, the middle of 19th century and the 1930s respectively.In the first half of this century, the climate turned warmer again. But a wet period lasting 35 years since 1905 made modern glaciers begin their third great retreat as late as in the 1930s. In the 50 years since 1930, glaciers have retreated continuously but slowly with a velocity generally less than 6 m each year. In the ten years from the end of 1950s to the end of 1960s, glaciers retreated with a quickest rate in the past 50 years, and the variations at the glacial termini were most obvious. But at the sametime, some glacial termini in Bogda remained unchanged for a long period.更多还原