Global circulation

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Global circulation
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IR
VIS
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• Animations of satellite composites Earth
  http//www.ssec.wisc.edu/data/composites.html
• Check out IR and WV images, compare to general
  model

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Aberrations from model?

• Seasonal
• ITCZ follows sun with slight delay
• Land/ocean distribution modifies subtropical H
• Oceanic H often accompanied by cloud cover
• Troughs and ridges in the polar and subtropical
  jets
• Seasonal variations

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January
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July
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• Upper air mid-latitude Westerlies
• (some board work)

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Current Jet situation

• Plots of isoheights and Rossby waves (try
  animations) http//www.cdc.noaa.gov/map/images/ens
  /ens.html

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Variations
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Short waves
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Short waves
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Check for long- and short waves

• Plots of isoheights and Rossby waves (try
  animations) http//www.cdc.noaa.gov/map/images/ens
  /ens.html

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Seasonal variations

• ITCZ shifts toward summer pole
• Stronger shift over land

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January
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July
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Seasonal variations

• Polar jet stream closer to pole during summer
• Polar jet weaker during winter
• New sub polar lowpressure systems during winter

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Monsoons

• Global circulation and land/ocean interaction
• Summer monsoon in India
• SE trade winds land/ocean gradient

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Influence of topography