A note on the use of a forecast as the first guess in objective analysis¹

1 Research supported in part by the Section of Atmospheric Sciences, National Science Foundation, Grant GP-2561

Abstract

Some evidence is shown that the National Meteorological Center (NMC) objective analyses over the Pacific largely exaggerate the meridional transport of zonal momentum and on the average show the west wind maximum north of its true position. The use of numerical forecast as the first guess in the objective analysis is suggested as a possible cause of these systematic errors.

Notes

1 Research supported in part by the Section of Atmospheric Sciences, National Science Foundation, Grant GP-2561