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Geog. 111 Notes 7

Geog. 111 Notes 7 - -midlatitude(wave cyclones-commonly...

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-midlatitude (wave) cyclones: -commonly found in mid-latitudes, north of 30 degrees and south of 60 degrees (ridges and troughs formed by cyclones resemble waves); fronts divide air masses with cold, dry air masses to the north and warm, tropical air masses to the south; nor’easters form in Gulf of Mexico or off the US East Coast and move north -“storm of the century” in March of 1993: system spanned from South America to Canada, produced flooding in Caribbean, tornados in Florida, record snowfall along US East Coast -frontal cyclones: wave cyclones associated with frontal boundaries; warm sector is the southeastern part of cyclone that tries to move northward; cool sector is air that is out in front of warm sector (air from warm sector glides over air in cool sector, much precipitation ahead of warm front and warm sector, also much precipitation behind the cold front); cold sector is air behind the cold front -case study (the monster storm that hit and sank the freighter the Edmund Fitzgerald ): -what was the Edmund Fitzgerald?: Great lakes ore freighter that made trips from Minnesota to Detroit; 729 feet long, hauled enough iron to make 7500 cars; lost in fierce storm near Whitefish Bay, Michigan on Nov. 10, 1975; no mayday and no survivors -why did sinking happen?: as with Titanic, the sinking is legendary; many hypotheses including the NTSB’s (sudden massive flooding b/c of collapsed hatch covers), the US Coast Guard’s (loss of buoyancy due to hours long flooding of cargo hold, leaky hatch covers), the Lake Carriers’ Association (Fitz hit bottom around mid afternoon, flooding below waterline caused sinking)
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