Recalculations of pack ice and lead surface energy budgets during the Arctic Leads Experiment (LEADEX) 1992

Because of the discovery of two errors in the calculations of long-wave radiative fluxes from the Eppley radiometers, a recalculation of the ice pack and surface energy budgets during the Arctic Leads Experiment (LEADEX) was necessary. The error principally contributing to the observed differences was in the relationships that have been used for obtaining long-wave radiative fluxes from Eppley radiometers for the past 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 amplitudes of the diurnal variations of the longwave fluxes and the skin temperature; an increase in the estimate of the sensible heat transfer coefficient (C-H) and the removal of its apparent diurnal cycle; and an interpretation of a more stable near-surface background atmosphere 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.