Intertropical convergence zone itcz global max net

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Intertropical Convergence Zone (ITCZ) Global max net radiation in equatorial region. Triggers warming, uplift, surface low pressure. Very unstable. Wet, rainy conditions predominate. ITCZ is centered on the equator. Region of tropical rain forests
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Subtropical High Pressure Cells (STHP) Rising air over ITCZ moves pole ward aloft, then subsides to surface. Subsiding air generates high-pressure cells in major ocean basins. Stable conditions predominate clear skies, dry. Centered on 20-30 degrees N/S Region of major subtropical deserts. Trade Winds Easterly wind fields in tropical regions. Air moves from H L, from STHP ITCZ Coriolis deflection creates easterly winds NE trade winds in N hemisphere SE trade winds in S Hemisphere Polar Front Westerlies (PFW)
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Polar front—Region of strong thermal contrast between tropical and polar atmosphere. Zone of maximum heat exchange and frontal wedging. Storms develop along this zone of temp. contrast. Surface cyclones (L) migrate along PF boundary, steered by upper-level westerly winds. Generally wet, unstable atmosphere. Conditions vary from day-to-day. Polar High Pressure (PHP) Coldest atmospheric conditions, especially during dark polar winters. Cold, dense air produces surface high pressure Very stable and dry Tundra/major icecaps. Iceland and Greenland.
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