نتایج جستجو برای: antarctic lake
تعداد نتایج: 55835 فیلتر نتایج به سال:
The geothermal heat flux is a critical thermal boundary condition that influences the melting, flow, and mass balance of ice sheets, but measurements of this parameter are difficult to make in ice-covered regions. We report the first direct measurement of geothermal heat flux into the base of the West Antarctic Ice Sheet (WAIS), below Subglacial Lake Whillans, determined from the thermal gradie...
The nature of microscopic particulates in meteoric and accreted ice from the Vostok ice core, is assessed in conjunction with existing ice core data to investigate the mechanism by which particulates are incorporated into refrozen lake water. Melted ice samples from a range of ice core depths were filtered through 0.2 μm polycarbonate membranes and secondary electron images were collected at ×5...
The subglacial Lake Vostok in Antarctic is a unique natural phenomenon, its comprehensive study involves sampling of water and bottom surface rocks. For further the lake, it necessary to drill new access well develop environmentally safe technologies for exploration. This article discusses existing potential rocks lakes. All these meet environmental safety requirements are conducive sampling. a...
ENDURANCE (Environmentally Non-Disturbing Under-ice Robotic Antarctic Explorer) is a highly maneuverable, hovering autonomous underwater science platform descended from the DEPTHX vehicle, both of which were developed under NASA ASTEP funding. ENDURANCE had the specifi c mission of descending through a 5 meter deep melt hole in the ice cap of West Lake Bonney, Taylor Valley, Antarctica and cond...
Tropical Andes The record of ancient glaciers is the principal source of information on high-altitude paleoclimate in the tropics, but the age of late Pleistocene glaciation throughout the tropics is poorly constrained, which complicates estimating past climate from glacial records. Seltzer et al. (1) established that maximum late Pleistocene glaciation in the tropical Andes was broadly synchro...
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