首页    期刊浏览 2025年07月18日 星期五
登录注册

文章基本信息

  • 标题:The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland
  • 本地全文:下载
  • 作者:Tranter Martyn ; Raiswell Robert
  • 期刊名称:Journal of Glaciology
  • 印刷版ISSN:0022-1430
  • 电子版ISSN:1727-5652
  • 出版年度:1991
  • 卷号:37
  • 期号:125
  • 页码:59-66
  • DOI:10.1017/S0022143000042805
  • 出版社:Cambridge University Press
  • 摘要:A new method of hydrograph separation for bulk meltwaters draining Alpine glaciers is proposed. It is based on the two-component (subglacial and englacial) mixing model of Collins (1978), but allows the composition of the subglacial component to vary between ascending and descending lines of the hydrograph. The mean englacial component can be derived from linear relationships between sulphate concentrations and other ions in bulk meltwaters. On certain occasions during the ablation season, the maximum concentration of ions in the subglacial component can be determined from the linear relationship between bulk meltwater sulphate concentrations and discharge. The bulk discharge is then a direct measure of the mass fraction of the englacial component. At maximum discharge, the contribution of the subglacial component approaches zero, which has implications for the storage and mixing of waters in subglacial reservoirs. Further, the subglacial component is not of constant composition, and may itself be a mixture of dilute supraglacial and concentrated subglacial water.
国家哲学社会科学文献中心版权所有