GRG301KTEST4 - 04.22.10...

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Jet Streams (aviation and cold/warm fronts surface maps) Polar jet streams- cold air south Subtropical jet stream-warm air north Global Winds and Oceans Surface waters of oceans tend to move with the surface wind Upwelling The Southern Oscillation (pacific water temps in the pacific basin between the west coast of south  America to the, westward to southeastern Asia, west of Australia. southern pacific) La Nina-  colder than avg equatorial (west of South America) Pacific Ocean water temp.  Ex: Dec 2000: higher of the low pressure is in the west of South America, and the lower is  more out in the pacific (L  -- H).  Trade winds are east to west.  High pressure is colder. El Nino-  warmer than avg equatorial (west of South America) Pacific Ocean water temp.  Ex: (H  L).  Trade winds are reversed.  El Nino reaches its peak around Christmas. 3 to 7 year period This warming and cooling has a tremendous effect worldwide. Notable El Nino Events 1982-1983: Strong event; $8 billion in damage. (New Orleans, Southern Mississippi) 1986-1987: Weaker event; Ended drought in SE USA (Georgia, Florida) 1991-1992: Strong event; Severe Texas flooding, 5 year drought ended in California Local Scale Winds Sea/Land Breezes:  -SEA BREEZE (comes from the sea)- daytime  -LAND BREEZE (comes from the land)-night time  -water heats and cools more slowly than land does Mountain/Valley Breezes: -Mountain breeze- nighttime (clouds will be over the valley) -Valley breeze- daytime (clouds over the top of the mountain) Monsoons: -A seasonal wind shift -India/Southeastern Asia -Southwestern USA- a “baby” monsoon (summer thermal low) -Winter monsoons: off shore winds HIGH…dry season -Summer monsoons: on shore winds LOW…wet season -470 in. of rain a year Thermal Lows: -A low pressure circulation created by changes in air temperature (strong daytime heating over  the southwestern USA during the summer months) -Results in the summer “monsoon” over Arizona
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This note was uploaded on 10/04/2011 for the course GRG 301K taught by Professor Kimmel during the Spring '08 term at University of Texas at Austin.

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GRG301KTEST4 - 04.22.10...

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