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Sunlight, Sea Ice, and the Ice Albedo Feedback in a Changing Arctic Sea Ice Cover
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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The overarching goal of this work is to develop a quantitative understanding of the partitioning of solar radiation of the Arctic sea ice cover and its impact on the heat and mass balance of the ice and upper ocean. Particular emphasis will be placed on the Chukchi and Beaufort Seas, where there have been large changes in ice conditions in recent years. Objectives 1. Synthesize relevant data from reanalysis products, satellite observations, previous field campaigns, and the ongoing Arctic Observing Network. 2. Calculate the partitioning of spectral solar radiation between reflection to the atmosphere, absorption within the ice, and transmission to the ocean. 3. Determine the relative impact on solar partitioning of changes in i incident solar radiation, ii ice concentration, iii ice age, and iv onset dates of melt and freezeup. 4. Assess the magnitude of the contribution from ice-albedo feedback to the observed decrease of sea ice in the Chukchi and Beaufort Seas. 5. Relate solar heat input to the ice and ocean to surface, bottom, lateral, and internal melting of the ice cover. 6. Determine spatial distribution and temporal evolution of solar heat absorbed in the upper ocean. 7. Transfer results from this study to the sea ice prediction and modeling community to improve the treatment of solar radiation and the ice-albedo feedback. This transfer will take the form of publications and direct input to parameterization development.
APPROVED FOR PUBLIC RELEASE