A Comparative Study of Observed Northern Hemisphere Circulation Statistics Based on GFDL and NMC Analyses. Part I: The Time-Mean Fields

Publisher Website
Google Scholar
Abstract
Two sets of monthly mean analyses based essentially on the same observational data, but employing different analysis procedures, are compared. The first set was compiled at the Geophysical Fluid Dynamics Laboratory and consists of horizontal interpolations of monthly averaged circulation statistics accumulated at individual rawinsonde stations. The second set was derived from twice-daily gridded analyses produced by the National Meteorological Center on an operational basis. The data used cover nine winters and nine summers within the 1963–73 period. The spatial domain extends in latitude from 20° to 90°N, and in the vertical from 850 to 100 mb. The circulation statistics examined include 1) hemispheric distributions of 9-year averages as well as month-to-month standard deviations for the horizontal wind components and geopotential heights at 850, 500 and 200 mb, and the temperature at 850 mb; and 2) latitude-height sections for the zonally averaged wind and temperature, the standing eddy varianc... Abstract Two sets of monthly mean analyses based essentially on the same observational data, but employing different analysis procedures, are compared. The first set was compiled at the Geophysical Fluid Dynamics Laboratory and consists of horizontal interpolations of monthly averaged circulation statistics accumulated at individual rawinsonde stations. The second set was derived from twice-daily gridded analyses produced by the National Meteorological Center on an operational basis. The data used cover nine winters and nine summers within the 1963–73 period. The spatial domain extends in latitude from 20° to 90°N, and in the vertical from 850 to 100 mb. The circulation statistics examined include 1) hemispheric distributions of 9-year averages as well as month-to-month standard deviations for the horizontal wind components and geopotential heights at 850, 500 and 200 mb, and the temperature at 850 mb; and 2) latitude-height sections for the zonally averaged wind and temperature, the standing eddy varianc...

This publication has 0 references indexed in Scilit: