Sea ice-atmosphere interaction. Application of multispectral satellite data in polar surface energy flux estimates

• Main Authors: Key, Jeff, Steffen, Konrad, Maslanik, Jim, Haefliger, Marcel, Fowler, Chuck
• Format: Other/Unknown Material
• Language: unknown
• Published: 1992
• Subjects: GEOPHYSICS; Arctic; Arctic Basin; ice pack; Sea ice
• Online Access: http://hdl.handle.net/2060/19920010531

Satellite data for the estimation of radiative and turbulent heat fluxes is becoming an increasingly important tool in large-scale studies of climate. One parameter needed in the estimation of these fluxes is surface temperature. To our knowledge, little effort has been directed to the retrieval of the sea ice surface temperature (IST) in the Arctic, an area where the first effects of a changing climate are expected to be seen. The reason is not one of methodology, but rather our limited knowledge of atmospheric temperature, humidity, and aerosol profiles, the microphysical properties of polar clouds, and the spectral characteristics of the wide variety of surface types found there. We have developed a means to correct for the atmospheric attenuation of satellite-measured clear sky brightness temperatures used in the retrieval of ice surface temperature from the split-window thermal channels of the advanced very high resolution radiometer (AVHRR) sensors on-board three of the NOAA series satellites. These corrections are specified for three different 'seasons' and as a function of satellite viewing angle, and are expected to be applicable to the perennial ice pack in the central Arctic Basin.