Abstract

Abstract Haney-type surface thermal boundary conditions linearly connect net downward surface heat flux Q to air–sea temperature difference (gradient-type condition) ΔT1 or to climate/synoptic sea temperature difference (restoring-type condition) ΔT2 by a coupling coefficient κ. In this study, the authors used the global reanalyzed data (6-h resolution) of Q, surface air temperature TA, and sea surface temperature TO from the National Centers for Environmental Prediction during 1 October 1994–31 December 1995 to verify the validity of Haney-type surface thermal boundary conditions. First, daily means of these variables were computed to get rid of diurnal variation. Second, the cross-correlation coefficients (CCC) between Q and (ΔT1, ΔT2) were calculated. The ensemble mean CCC fields show (i) no correlation between Q and ΔT2 anywhere in the world oceans, (ii) no correlation between Q and ΔT1 in the equatorial regions, and (c) evident correlation (CCC ≥ 0.7) between Q and ΔT1 in the middle and high latitude...

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