Experimental Constraints on Ocean Wave Erosion of Icebergs and Glaciers

Adriana Formby FernandeFollow

Presentation Type

Long presentation (faculty/staff) 15-20 minutes

Campus

Daytona Beach

Status

Student

Faculty/Staff Department

Physical Sciences

Student Year and Major

Senior - Engineering Physics

Start Date

28-1-2020 2:30 PM

End Date

28-1-2020 2:50 PM

Presentation Description/Abstract

Loss of ice from glaciers and ice sheets has been steadily increasing over recent decades due to rising oceanic and atmospheric temperatures. White (1980) developed a theoretical estimate for the erosion rate of icy surface by wave activity, which has since been used as the sole basis for calculating wave melting effects in ocean and ice sheet models. In this study, we conduct the first new experiments since White (1980) to test the established parameterization and extend it to a wider range of wave and water properties. A custom-built 1.2 meter long wave tank is used to simulate the behavior of ocean waves on ice shelves in a laboratory-scaled manner. White’s theory is tested for a wide range of conditions to within a reasonable margin of error (given the limitations of the tank and required assumptions). We further discuss how the results from this experiment can help to improve models of the high-latitude oceans for the benefit of predicting future climate, and assessing iceberg hazards to shipping.

Keywords

Glacier, erosion, ocean

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Jan 28th, 2:30 PM Jan 28th, 2:50 PM

Experimental Constraints on Ocean Wave Erosion of Icebergs and Glaciers

Loss of ice from glaciers and ice sheets has been steadily increasing over recent decades due to rising oceanic and atmospheric temperatures. White (1980) developed a theoretical estimate for the erosion rate of icy surface by wave activity, which has since been used as the sole basis for calculating wave melting effects in ocean and ice sheet models. In this study, we conduct the first new experiments since White (1980) to test the established parameterization and extend it to a wider range of wave and water properties. A custom-built 1.2 meter long wave tank is used to simulate the behavior of ocean waves on ice shelves in a laboratory-scaled manner. White’s theory is tested for a wide range of conditions to within a reasonable margin of error (given the limitations of the tank and required assumptions). We further discuss how the results from this experiment can help to improve models of the high-latitude oceans for the benefit of predicting future climate, and assessing iceberg hazards to shipping.