CAS ES 351 Lecture Notes - Lecture 11: Canadian Arctic Archipelago, Southern Ocean, Iceberg
15 Feb 2019
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Iceberg: is a detached piece of a glacier. Sea ice: is on land, forms at surface of ocean where we start freezing sea water. ~we monitor deep water formation with this as well. Glacier ice: forms on land when snow freezes that survives the summer heat. Snow compresses into ice, when it gets thick enough it starts collapsing under its own weight. ~there was a clear route through canadian arctic islands. Sea ice has the albedo energy balance (positive feedback), and it also has air-ocean heat exchange. So ice blocks heat from escaping from the ocean to the air. Even cold water has a significant amount of heat in it. With sea ice covering the surface ocean, the air above it can get really cold. The arctic is 5 degrees warmer than preindustrial era because sea ice is melting so there is no ice- albedo feedback, and more heat is going from the ocean to the air, making temperatures warmer.
