Ice thickness, areal and volumetric changes of Davies Dome and Whisky Glacier (James Ross Island, Antarctic Peninsula) in 1979–2006

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Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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ENGEL Zbyněk NÝVLT Daniel LÁSKA Kamil

Rok publikování 2012
Druh Článek v odborném periodiku
Časopis / Zdroj Journal of Glaciology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Doi http://dx.doi.org/10.3189/2012JoG11J156
Obor Zemský magnetismus, geodesie, geografie
Klíčová slova Antarctica; James Ross Island; Antarctic Peninsula; ice cap; ice thickness; valley glacier; ground-penetrating radar; glacier; elevation changes;
Popis This study calculates area, volume and elevation changes of two glaciers on James Ross Island, Antarctica, during the period 1979–2006. Davies Dome is a small ice cap. Whisky Glacier is a valley glacier. Ground-penetrating radar surveys indicate ice thickness, which was used for calculations of the bed topography and volume of both glaciers. Maximum measured ice thicknesses of Davies Dome and Whisky Glacier are 83 +/- 2 and 157 +/- 2 m, respectively. Between 1979 and 2006, the area of the ice cap decreased from 6.23 +/- 0.05 km2 to 4.94 +/- 0.01 km2 (–20.7%), while the area of the valley glacier reduced from 2.69 +/- 0.02 km 2 to 2.40 +/- 0.01 km2 (–10.6%). Over the same period the volume of the ice cap and valley glacier reduced from 0.23 +/- 0.03 km3 to 0.16 +/- 0.02 km3 (–30.4%) and from 0.27 +/- 0.02 km3 to 0.24 +/- 0.01 km3 (–10.6%), respectively. The mean surface elevation decreased by 8.5 +/- 2.8 and 10.1 +/- 2.8 m. The average areal (0.048–0.011 km2 a–1) and volumetric (0.003–0.001 km3 a–1) changes are higher than the majority of other estimates from Antarctic Peninsula glaciers.
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