Circulation Statistics for the Extratropical Northern Hemisphere Based on NMC Analyses

摘要

Polar stereographic maps and meridional cross-sections of selected circulation statistics for the extratropical regions from 1000 to 100 mb (20-90 degrees N) of the Northern Hemisphere are presented for winter and summer. The statistics were calculated from twice daily gridded synoptic analyses produced by the U.S. National Meteorological Center on an operational basis for 11 winters (1965-66 to 1975-76) and 12 summers (1966 to 1977).