Lecture 6: Oceanography PDF
Document Details
Indian Institute of Science Education and Research Kolkata
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Summary
This lecture covers the topic of oceanography, specifically focusing on sea ice formation, its processes, and characteristics. It discusses the factors influencing sea ice formation including salinity and location. The lecture also defines "fast ice," "ice floes," and "leads."
Full Transcript
Lecture 6: Oceanography Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Sea ice (frozen seawater) -1.91°C Ice formation process in seawater...
Lecture 6: Oceanography Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Sea ice (frozen seawater) -1.91°C Ice formation process in seawater depends on its salinity Sea ice formed in shallow water ICE FLOE near the coast known as “fast ice” Pancakes of sea ice growing in thickness and lateral extent form “Ice floe or ice sheet” Once ice has formed at the sea surface, freezing continues at base Density Sea Ice ~857-924 of the ice and depends on the kg/m3 as compared to thickness of the ice and snow cover that in freshwater ice Hummocks ~916.8 kg/m3 Small breaks between ice floes are called “leads” Larger recurrent open Lead water areas are called “polynyas” Thanks
