کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4681177 | 1634949 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The level of the GrÃmsvötn subglacial lake, Vatnajökull, Iceland, monitored with SPOT5 images
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
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چکیده انگلیسی
The uplift map of GrÃmsvötn shows that 10.9 (± 1) km2 of ice was floating between 11 and 16 August 2004. The ice shelf rose by 1.7 (± 0.6) m indicating that the volume of liquid water in the lake increased by 0.018 (± 0.007) km3. Our field observations show that surface melting due to meteorological processes contributed 70% of the accumulated water, hence, the rest originated from ice melted by the subglacial geothermal activity. The power required to melt 0.005 km3 (water equivalent) of basal ice in 5 days is 4000 MW. The applicability of the technique can be extended to volcanology and seismology, and even landslides or subsidence, when finer-resolution optical images become available. Applied to two pairs of images, it could solve for the 3-dimensional displacements of the Earth's surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 243, Issues 1â2, 15 March 2006, Pages 293-302
Journal: Earth and Planetary Science Letters - Volume 243, Issues 1â2, 15 March 2006, Pages 293-302
نویسندگان
E. Berthier, H. Björnsson, F. Pálsson, K.L. Feigl, M. Llubes, F. Rémy,