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UPPER AIR MAPS. Change of Air Pressure with Height. Pressure = 500 mb. Warm air is less dense ( “ thicker ” ) than cold air. Strongest Winds. Three-Dimensional Depiction of an Upper Air Constant Height Surface. Ridge. Surface Low. Surface High. Cold. Cold. L. H. Trough. Warm.
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Pressure = 500 mb Warm air is less dense (“thicker”) than cold air.
Strongest Winds
Three-Dimensional Depiction of an Upper Air Constant Height Surface
Ridge SurfaceLow SurfaceHigh Cold Cold L H Trough Warm Surface lows form downstream of upper air troughs. Surface highs form downstream of upper air ridges.
Jet Streams COLD WARM WARM WARM (Chap. 8, pp. 206–210)
CLOUD CLASSIFICATION
CUMULUS CONGESTUS (IN BACKGROUND) CUMULUS HUMILIS (IN FOREGROUND)
The same type of cloud will typically be at a lower altitude in the polar regions and higher in the tropics. (Chap. 5, pp. 127–135)
Nerdy Cloud Classification Details Just like animals and plants, clouds are classified according to their genus, species, and variety. 1. Genera: e.g., stratus, cumulonimbus (the types discussed today) 2. Species: e.g., humilis, congestus, castellanus, lenticularis (later) 3. Variety: e.g., undulatus, translucidus, opacus So a cloud might be classified as altocumulus castellanusopacus. (For examples, see Table 5.4 (page 133) and https://cloudatlas.wmo.int/principles-of-cloud-classification.html )