Ice flow models and glacial erosion over multiple glacial–interglacial cycles
نویسندگان
چکیده
منابع مشابه
Eight glacial cycles from an Antarctic ice core
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate variability was smaller before that time, but such records are often poorly resolved. Moreover, it is not possible to infer the abundance of greenhouse gases in the atmosphere from marine records. Here we...
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Organized conduits of fast ice flow at the fringe of present and past ice sheets move the majority of ice from ice sheet interior to periphery. These relatively narrow corridors play a critical role in feedbacks between landscape evolution and ice sheet dynamics. Here we combine bedrock Be concentrations with distribution of lakes on Baffin Island, Arctic Canada, to constrain the pattern of gla...
متن کاملLecture 9 Mechanisms and toy models of the glacial cycles
(Ghil [14]) Assume that higher elevation of the ice sheet surface results in colder ice-sheet surface temperature, therefore in less ablation, and therefore in more net accumulation (i.e. opposite of the elevation-desert effect). As the ice volume increases, the ice sheet sinks into the bedrock, moving more of the the glacier surface area into an elevation of less accumulation/ more ablation (o...
متن کاملMechanisms and Toy Models of the Glacial Cycles
A laboratory experiment has been conducted in which a small basin was heatedfrom below. This basin was connected to a large reservoir that was filled with a layerof salt water at the bottom and fresh water above it, by tubes at the top, the middleand the bottom. It was shown that different flow regimes exist in this experiment. Forlow forcing temperatures, self-sustained osc...
متن کاملGlacial flow of floating marine ice in ‘‘Snowball Earth’’
[1] Simulations of frigid Neoproterozoic climates have not considered the tendency of thick layers of floating marine ice to deform and spread laterally. We have constructed a simple model of the production and flow of marine ice on a planetary scale, and determined ice thickness and flow in two situations: when the ocean is globally icecovered (‘‘hard snowball’’) and when the tropical waters r...
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ژورنال
عنوان ژورنال: Earth Surface Dynamics
سال: 2015
ISSN: 2196-632X
DOI: 10.5194/esurf-3-153-2015