地理学报 ›› 1992, Vol. 59 ›› Issue (3): 260-266.doi: 10.11821/xb199203007

• 论文 • 上一篇    下一篇

乌鲁木齐河源雪密度观测研究

杨大庆, 张寅生, 张志忠   

  1. 中国科学院兰州冰川冻土研究所
  • 出版日期:1992-05-15 发布日期:1992-05-15
  • 基金资助:
    国家自然科学基金资助项目

A STUDY ON THE SNOW DENSITY IN THE HEAD AREA OF URUMQI RIVER BASIN

Yang Daqing, Zhang Yingsheng, Zhang Zhizhong   

  1. Lanzhou Institute of Glaciology & Geocrylolgy, Chinese Academy of Science
  • Online:1992-05-15 Published:1992-05-15

摘要: 乌鲁木齐河源高山区积雪形成期(10月)积雪层的月平均密度为140kg/m3,稳定积雪前期(11—2月)和稳定积雪后期(3—4月)雪层的月平均密度分别为190—210kg/m3和175kg/m3,非稳定积雪期(5—9月)的新雪密度介于90—125kg/m3,平均值为112kg/m3。统计分析表明,冬季积雪层的平均密度不随积雪深度而变化,但与5日平均气温和5日合计降水量呈反相关关系,夏季新雪的密度随雪深的增大而上升,风速对冬季积雪层平均密度和夏季新雪密度均无明显影响作用。

关键词: 高山区, 积雪层, 新雪, 密度

Abstract: The profile averaged snow density in the high alpine area of Urumqi river basin is 140 kg/m3 in the period of the formation of deposit snow during early winter (Oct.), It grows to 190-21O kg/m3 in the early period of stable snow cover during the middle winter (Nov.-Feb.) and reduces to 175kg/m3 in the late period of stable snow cover during late winter and early spring (Mar.-Apr.).

Key words: High alpine area, Deposited snow, New snow, Density