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Ice and icebergs in Antarctica by Andrés Tarruella
December 5, 2023 · 39 min · 5K views · Marambio Base
What this video covers
Andrés Tarruella, a meteorologist stationed at Argentina’s Base Marambio, outlines the identification and navigation hazards of sea ice and land-based ice in the Antarctic.0:59 He distinguishes between sea ice, which forms from saline water, and land-based ice, which originates from glaciers and freshwater precipitation.2:58 Sailors must account for the fact that only one-eighth of a floating ice mass remains above the waterline, with submerged "spurs" or keels posing significant collision risks.4:02 Tarruella categorizes ice by size and form, ranging from "gruñón" (small, irregular ice chunks) to massive tabular icebergs and large ice floes.9:43 He explains that ice concentration is measured in tenths, with concentrations below one-tenth indicating open water.19:38 Visual cues, such as light reflection on clouds, help navigators identify open water leads even when surrounded by ice.26:36 The presentation also touches on the influence of the Antarctic Circumpolar Current and the impact of seasonal light cycles on navigation and habitability.34:14
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