12-8-08 - Global Climate Change1.Indirect effects of the...

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Unformatted text preview: 12-8-08Global Climate Change1.Indirect effects of the Pleistocene2.The Ice Ages3.Evidence of past climates4.Climate change theories5.Global warming Mountain Glaciation•Ice only modifies pre-glacial landscape, doesn’t create hills or valleys •Ice over steepens slopes, broadens valleysoStreams V-shaped valleys (Hasn’t been glaciated) oGlaciers U-shaped valleys•Moraines are deposited—damming lakes•Longitudinal profiles of streams more irregular Glacial Recession•Mass balance- strongly negative I ndirect Effects of the Ice1.Sea level changesa.If Iceland/Greenland were to melt, sea level would rise and water would cover the US2.Deserts—wetter, pluvial lakes 3.Vegetation change worldwide 4.Stream adjustment to glacial meltwatera.Glacial outwash streamsi.Missourri and Ohio•When glaciation occurs—when its really cold, sea level is falling, but lakes and deserts rise. ***know for test*****•Sea level rises, deserts are hotter and lakes dry up in interglacial period (warmer period—continental ice sheets ablate) The Pleistocene Epoch...
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This note was uploaded on 01/17/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at UGA.

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12-8-08 - Global Climate Change1.Indirect effects of the...

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