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    Time Spectral Analysis of Mid-Latitude Disturbances

    Source: Monthly Weather Review:;1974:;volume( 102 ):;issue: 005::page 348
    Author:
    Hartmann, Dennis L.
    DOI: 10.1175/1520-0493(1974)102<0348:TSAOML>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The method of time series analysis is used to study rawinsonde data in middle latitudes. The spectra reveal baroclinically unstable traveling waves with a preferred period of four to five days and a large amount of variance at lower frequencies. The preferred period of the longer-period waves is roughly 30 days, although the character of the disturbances in this range is highly variable. For the waves of periods between three and seven days, phase relations are derived for the northward component of the wind, the temperature, and the height of constant pressure surfaces. The phase relations are characteristic of traveling baroclinic waves and possess reasonable statistical significance. No stable phases were obtained for the eastward component of the wind or for the longer-period oscillations.
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      Time Spectral Analysis of Mid-Latitude Disturbances

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    contributor authorHartmann, Dennis L.
    date accessioned2017-06-09T16:00:32Z
    date available2017-06-09T16:00:32Z
    date copyright1974/05/01
    date issued1974
    identifier issn0027-0644
    identifier otherams-58655.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4199126
    description abstractThe method of time series analysis is used to study rawinsonde data in middle latitudes. The spectra reveal baroclinically unstable traveling waves with a preferred period of four to five days and a large amount of variance at lower frequencies. The preferred period of the longer-period waves is roughly 30 days, although the character of the disturbances in this range is highly variable. For the waves of periods between three and seven days, phase relations are derived for the northward component of the wind, the temperature, and the height of constant pressure surfaces. The phase relations are characteristic of traveling baroclinic waves and possess reasonable statistical significance. No stable phases were obtained for the eastward component of the wind or for the longer-period oscillations.
    publisherAmerican Meteorological Society
    titleTime Spectral Analysis of Mid-Latitude Disturbances
    typeJournal Paper
    journal volume102
    journal issue5
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1974)102<0348:TSAOML>2.0.CO;2
    journal fristpage348
    journal lastpage362
    treeMonthly Weather Review:;1974:;volume( 102 ):;issue: 005
    contenttypeFulltext
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