Papers Online - #138

Energy Exchange in early Spring over Sea Ice in the Pacific Sector of the Southern Ocean


Adrian Hauser* , Gerd Wendler, Ute Adolphs, Martin O. Jeffries

Geophysical Institute, University of Alaska, Fairbanks, Alaska

Abstract. In September/October 1994, during a cruise to Antarctica, we carried out measurements of the radiation balance and turbulent fluxes aboard the R.V. Nathaniel B. Palmer. Hourly and daily flux values were calculated. The net radiation and the eddy fluxes showed the expected diurnal variations. On average, the ocean warmed the atmosphere 30.7 Wm-2, a reasonable value for spring. This flux, which was obtained as the remainder of the heat budget equation, showed larger values at night than during daytime. The surface albedo was also investigated. The area-averaged albedo increased from 0.08 for open water to 0.59 for 10/10 ice concentration. There was a large amount of scatter for the albedo when the ship was within the ice pack; low albedo values were associated with young non-snow covered ice and ice with wet snow cover.




Gerd Wendler
Date Last Modified: 4/30/00