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Ch6 (1) -...

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Unformatted text preview: http:llwww.atmo.ttu.edulphillips/chapter6notes.htm Fall 2009 Cloud Development & Forms Chapter 6 m 1. Clouds predominately form when moist air rises (adiabatic cooling). 2. Clouds form when water vapor condenses onto condensation nuclei. 3. Latent heat of condensation released 4. Clouds are composed of tiny liquid water drops and/or ice crystals. Il'l‘fill' 1- woos/v vapor 2. Rising air -- sufficient cooling to attain saturation 3. Atmospheric Stability lDefine: A condition of the atmosphere that affects the strength of 3“ fl g g! gaging) Atmospheric stability can be thought of as the resistance the atmosphere has to vertical motion. When we speak of vertical motion it can refer to either rising or sinking air. Since we have stressed rising air that leads to cloud formation, think of atmospheric stability as a condition of the atmosphere that either promotes or hinders upward motion. When talking about atmospheric stability we generally refer to the atmosphere as being either {all blf or Vii 613322116: An bMfi‘l‘lefi atmosphere will favor rapidly rising air currents a '0 atmosphere will not favor rapidly rising air currents so the rising air currents are relatively weak Also, 1n a stable atmosphere, air parcels must be £1 1“:le upward by some mechanism. What are some of these mechanisms? 1. “WOKNWN‘; 2. CZO‘WVQ'VQQVYC, 3. Fy Qk’Ur-g ‘ \ Stability is related to the positive or negative E 1 AOL l 6W); Lil ofan air parcel. Why is stability important? “ maximums HA2, rye. '0‘? cloud thew lof4 R—oth‘sin “SW03 ykNVOl-del (Aw I0/26/098:20AM ...
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