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Surface Energy Budgets and Cloud Forcing on the Arctic Ice Cap from the SHEBA Experiment |
NOAA Environmental Technology Laboratory,
NOAA Environmental Technology Laboratory,
CU Cooperative Institute for Research in Environmental Sciences,
USA Cold Regions Research and Engineering Laboratory,
US Naval Postgraduate School
cfairall@etl.noaa.gov
From November 1997 to October 1998 the Surface Heat Budget of the Arctic (SHEBA) engaged in a variety of atmospheric, ice, and oceanic measurements on the Arctic icecap as part of ice station SHEBA. The ice station was launched at 143°W and 75°N and ended at 166°W and 80°N. The measurements included eddy-correlation measurements of sensible and latent heat flux, upward and downward solar and IR fluxes, and snow/ice temperatures. Cloud information was obtained with a ceilometer and a 0.523 micron wavelength depolarization and backscatter lidar (dabul). We believe this is the first set of eddy-correlation heat flux, radiative fluxes, and comprehensive cloud data obtained over an entire annual cycle on the ice cap. In this paper we will present simple statistics on the annual cycle of the components of the surface heat budget and cloud properties (fraction, thickness, ice vs water, etc). We will also provide a preliminary analysis of the annual cycle of cloud forcing of the surface heat budget.
