Temperature differences pressure differences wind

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temperature differences pressure differences wind >temp dif in winter >PressureGradientForce >winds Coriolis effect: apparent deflection in the path of a moving object due to the earth’s rotation. o Happens because: The earth is a sphere The earth is rotating o N hemisphere to the right o S hemisphere to the left o strength varies with:
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latitude: max at poles, zero at 0degrees Global-scale effects of differential heating tropical atmosphere is heated and expanded o tropopause is higher above surface o air pressure in upper atmosphere is high Polar atmosphere is cooled and vertically compressed o Tropopause is closer to surface o Air pressure in upper atmosphere is low Upper level winds—equator: heating expansion, poles: cold air subsidence (weaker in summer). Upper pressure gradient o In upper atmosphere, Pg=Cf o Geostropic condition o Winds blow parallel to isobars o Upper level winds: “westerlies” Surface winds o Affected by: PGF
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Coriolis effect Friction slows winds down o N hemisphere—H pressure cell-clockwise o S hemisphere- L pressure cell-counterclockwise o Cyclonic Circulation Uplift Unstable Cloudy, rainy Counterclockwise inward (N hemisphere) Clockwise inward (S hemisphere) o Anticyclonic Circlulation Subsidence Stable Clear skies Clockwise outward (N hemisphere) Counterclockwise outward (S hemisphere)
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