Paleoglaciology of Alaska
收藏资源简介：
The Paleoglaciology of Alaska project involves scientists to estimate past climate parameters from glacial-geologic records. This project combines field research and cosmogenic-surface-exposure dating with GIS analysis of Alaskan glaciers that existed during the Last Glacial Maximum (LGM). -Former glacier extents, coupled with high-resolution Digital Elevation Models (DEM's), permit us to quantify past Equilibrium Line Altitudes (paleo-ELA's). -For each glacier, this parameter records a balance between winter precipitation and summer temperature. -Dense spatial arrays of hundreds of paleoELA's within 8 broad mountainous regions clarify: microclimatic vs. regional climatic controls on glacier growth; synoptic views of atmospheric moisture circulation; and spatially varying LGM aridity for comparison with numerical climate simulations. [Summary provided by the University of Colorado.]
