235 Exam 1 with 100% correct answers

Countries Bordering Arctic Ocean USA, Canada, Greenland, Iceland, Norway and Russia Depth of Eurasian Basin >2000 m Depth of Barents Sea between 200m and 400m Depth of Chucki Sea ~50m Depth of Canadian Basin >2000 m Depth of Bering Strait ~50m Siberian Shelf Sea <200m Polar vortex is __ the bering strait south/ same latitude Polar vortex is __ the fram strait south What is a cold air outbreak Its when the polar vortex extends farther south than usual. higher than normal pressure weakens polar jet stream. heating can cause Describe factors that promote O3 destruction UV irradiation. faster in cold temps and CFCS< Why is O3 hole smaller in arctic. Antarctic is colder, has more clouds, and more stable polar vortex which prevents air from migrating into antarctic. What is the AO AO is dominant pattern of sea level pressure variability. Higher AO? lower than usual pressure in the Arctic, stronger anticlockwise atmospheric circulation, smaller beaufort gyre, warm water invasion from arctic, loss of sea ice, warmer temps What is fast ice Ice fastened to coast line. 10s to 100s of meters off shore. can extend to 100s of km what are stahmuki sea ice pressure ridges on the seaward side of land fast ice. 5-10 m keel depth why are arctic polynas regions of high biological productivity? allow light to come in. Allow mixing of nutrients ...