Continental & Local Winds

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Presentation transcript:

Continental & Local Winds darkroom.baltimoresun.com www.meted.ucar.edu

Effects of Seasons & Continents Land heats faster than water creates low pressure over land high pressure over oceans summer conditions

Pressure Pattern: Summer http://apollo.lsc.vsc.edu/classes/met130/notes/chapter10/july_surface_press.html

Effects of Seasons & Continents Land cools faster than water creates high pressure over land low pressure over oceans winter conditions

Pressure Pattern: Winter http://apollo.lsc.vsc.edu/classes/met130/notes/chapter10/graphics/jan_sfc_press.jpg

Monsoon: seasonal wind change Caused by changes in heating of the land surface Strong summer heating Weak winter heating Temperature difference shifts wind direction http://www.geo.arizona.edu/Antevs/ecol438/monsoon.gif

ITCZ seasonal change http://www.newmediastudio.org/DataDiscovery/Hurr_ED_Center/Stages_of_Hurricane_Dev/ITCZ/ITCZ_fig02.jpg

Local Winds: Lake Breeze Same concept as monsoon, but occurs only during the day; smaller scale than a monsoon http://www.weatherwizkids.com/sea_breeze.gif

Local Winds: Land Breeze Same concept as monsoon, but occurs only during the night; smaller scale than a monsoon http://www.weatherwizkids.com/land_breeze.gif

Review Questions How does average air pressure over the U.S. in summer compare to winter? Explain why the location of the ITCZ varies from season to season. Compare and contrast a land breeze to a lake breeze. Explain why India has a rainy summer and a dry winter.