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    Calculated Height Tendencies in Two Southern Hemisphere Blocking and Cyclone Events: The Contribution of Diabatic Heating to Block Intensification

    Lupo, Anthony R., 1966-
    Market, Patrick S.
    Melick, Christopher J., 1975-
    Tilly, Douglas E.
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    [PDF] CalculatedHeightTendenciesTwo.pdf (1.203Mb)
    Date
    2008-09
    Contributor
    University of Missouri-Columbia. College of Agriculture, Food and Natural Resources (CAFNR). School of Natural Resources. Department of Soil, Environmental and Atmospheric Sciences.
    Format
    Article
    Metadata
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    Abstract
    The Zwack-Okossi vorticity tendency equation was used to calculate 500-hPa height tendencies in two intensifying Southern Hemisphere blocking events. The National Centers for Environmental Prediction- National Center for Atmospheric Research gridded reanalyses were used to make each of these calculations. The block intensification period for each event was associated with a deepening surface cyclone during a 48-h period beginning at 1200 UTC 28 July and 1200 UTC 8 August 1986, respectively. These results demonstrate that the diabatic heating forces height rises through the sensible and latent heating terms in these two Southern Hemisphere blocking events. The sensible heating was the larger contributor, second only to (about the same as) the vorticity advection term in the first (second) event. The vorticity advection term has been shown by several studies to be associated with block intensification.
    URI
    http://hdl.handle.net/10355/2350
    Citation
    Monthly Weather Review Volume 136, Issue 9 (September 2008), 3568-3578
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    • Soil, Environmental and Atmospheric Sciences publications (MU)

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