| Moisture distribution modification by upward vertical motion / Ira S. Brenner - :14081 | National Weather Service (NWS)
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Moisture distribution modification by upward vertical motion / Ira S. Brenner
  • Published Date:
    1977
Filetype[PDF-1.19 MB]


Details:
  • Personal Authors:
  • Corporate Authors:
    United States, National Weather Service., Western Region,
  • Description:
    During the Arizona summer monsoon season, large-scale air-mass changes within the state are generally quite minimal. Nevertheless, the coverage and intensity of Arizona's dally thunderstorm activity does vary considerably. Increases in thunderstorm activity can frequently be attributed to decreasing stability, as well as increasing· precipitable water, mixing ratio, and relative humidity due to upward vertical motion commonly associated with positive vorticity advection. It has been found that "dry" air, undergoing weak upward vertical motion, can easily become saturated at middle and upper levels in slightly over 24 hours, A case study during which these processes were actively engaged Is presented.

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