کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9491604 1630191 2005 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Glacier hydrochemistry, solute provenance, and chemical denudation at a surge-type glacier in Kuannersuit Kuussuat, Disko Island, West Greenland
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Glacier hydrochemistry, solute provenance, and chemical denudation at a surge-type glacier in Kuannersuit Kuussuat, Disko Island, West Greenland
چکیده انگلیسی
In 1995-1998, Han 11 km terrestrial surge of Kuannersuit Glacier, an outlet glacier of the largest ice cap on Disko Island, West Greenland, affected the catchment dramatically. In order to estimate solute fluxes and provenances, bulk meltwaters were sampled at the main subglacial outlet during the initial part of the quiescent phase. The hydrochemistry is significantly influenced by a subglacial basaltic weathering regime with absence of carbonate minerals. The results show that marine and aerosol derived solutes have minimal contribution to the total ion content, whereas sequestration of atmospheric CO2 associated with carbonation of Ca-rich feldspar and reactive volcanic glass is more dominant than previously reported from glacierized catchments. Application of a sampling strategy dividing water samples into four groups to determine the content of dissolved HCO3− and CO32− shows that the cationic equivalent weathering rate range is 683-860 Σmeq+ m−2 a−1 and solute flux ranges between 76 and 98 t km−2 a−1. The crustal denudation rate is estimated to 26 t km−2 a−1, and the transient CO2 drawdown amounts to 8500-13700 kg C km−2 a−1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 300, Issues 1–4, 10 January 2005, Pages 172-187
نویسندگان
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