RECALCULATIONS OF PACK ICE AND LEAD SURFACE-ENERGY BUDGETS DURING THEARCTIC LEADS EXPERIMENT (LEADEX) 1992

Because of the discovery of two errors in the calculations of long-wav e radiative fluxes from the Eppley radiometers, a recalculation of the ice pack and surface energy budgets during the Arctic Leads Experimen t (LEADEX) was necessary. The error principally contributing to the ob served differences was in the relationships that have been used for ob taining long-wave radiative fluxes from Eppley radiometers for the pas t 20 years. This paper focuses on the impacts on the LEADEX data. The main impacts of the corrections of these errors are decreases in the a mplitudes of the diurnal variations of the longwave fluxes and the ski n temperature; an increase in the estimate of the sensible heat transf er coefficient (C-H) and the removal of its apparent diurnal cycle; an d an interpretation of a more stable near-surface background atmospher e during the deployment to Lead 4. Average 10-m neutral values of the drag coefficient (C-D) and C-H are now found to be 1.46 x 10(-3) and 1 .40 x 10(-3), respectively.