Simulation of the Atmospheric Circulation Using the NCAR Global Circulation Model with Ice Age Boundary Conditions

摘要: Abstract The NCAR global circulation model has been used to simulate atmospheric conditions using boundary representing those of the present day and Wurm/Wisconsin glacial maximum at about 20,000 years ago, for January July cases. mean zonal wind strength in ice age case middle latitudes Northern Hemisphere was comparable with winter conditions. Also cases, upper westerlies were not apparently displaced south Laurentide sheet. Icelandic Aleutian lows 10° southward, Siberian high remained unchanged from control situation, a new low center found over eastern Europe European USSR. In pressure developed most Asia. Maps cyclone frequency 30-day period showed influence major sheets sea displacing zones activity southward January. Frequent cyclones occurred central North America there wa...