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| Keywords: Aridity ice age vs early holocene vs modern.jpg en During the Last Glacial Maximum 14000 years ago thermal-driven evaporation from the oceans onto continental landmasses was low causing large areas of extreme desert including polar deserts cold but with low rates of precipitation Greater precipitation today creates a much different distribution of climatic zones although anthropogenic changes including agriculture prevent forest cover from reaching its theoretical potential Near the start of the Atlantic Period 8000 years ago the world's climate was warmer and wetter than today according to an ORNL estimate http //www esd ornl gov/projects/qen/nerc html Adams J M Faure H 1997 eds QEN members Review and Atlas of Palaeovegetation Preliminary land ecosystem maps of the world since the Last Glacial Maximum Oak Ridge National Laboratory TN USA Oak Ridge National Laboratory Adams J M Faure H 1997 Not copyrighted as stated at http //www esd ornl gov/projects/qen/nerc html PD-USGov Weather and climate maps | ||||
