OCEANIC HEAT FLUXES UNDER THIN SEA-ICE IN SAROMA-KO LAGOON, HOKKAIDO,JAPAN

Measurements of turbulent eddy fluxes of momentum and heat under growi ng thin sea ice in a pool artificially constructed in the ice sheet we re made with a three-dimensional ultrasonic current meter and a fast-r esponse temperature-conductivity meter in Saroma-ko Lagoon, Hokkaido, Japan, during the joint Japanese and Canadian Saroma-Resolute Study (S ARES) project. The conductive heat flux across the ice sheet and the l atent heat of newly formed ice in the pool were estimated from observi ng the changes in temperature gradients through the ice sheet and in i ce thickness. The mean friction velocity was 0.13 cm s(-1) over the on e-day sampling period. The mean oceanic heat flux from the ocean to th e growing thin ice, obtained from the eddy correlation method, was 75 W m(-2) over the ice growing period at night and 33 W m(-2) over the n on-ice growing period in the day.