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Abstract
Data from instruments placed on tabular Antarctic icebergs show that they flex, heave, and roll in response to ocean waves. One iceberg was monitored for 13 months in the Weddell Sea by an automatic data collection platform deployed by the Norwegian Antarctic Research Expedition 1978-79. The temperature sensors demonstrated burial by snow-fall during autumn and winter, but melting during the following summer led to a net annual surface mass balance of -0.1 m water equivalent and to snow and firn temperatures being raised to the melting point. Strain and tilt instruments showed flexure and tilt with main frequencies around 15 to 20 s, but short sampling periods made it difficult to conduct comprehensive statistical analysis of the data.
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