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    Autocorrelation of Northern Hemisphere Geopotential Heights

    Source: Monthly Weather Review:;1983:;volume( 111 ):;issue: 001::page 155
    Author:
    Gutzler, D. S.
    ,
    Mo, K. C.
    DOI: 10.1175/1520-0493(1983)111<0155:AONHGH>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Local autocorrelation statistics for the Northern Hemisphere geopotential height field are presented for different seasons and tropospheric pressure levels. Values are generally much higher than those calculated from time series of outgoing infrared radiation or eddy heat fluxes. The largest one-day lag autocorrelation values are observed over the polar regions and eastern oceans. Well-defined minima exist off the cast coasts of Asia and North America. The minima are most distinct in winter, and are shifted northward and weaker during summer. Otherwise, the pattern does not change drastically with season. These geographical patterns do not change much with height, but the minima are less sharply defined at upper tropospheric levels. At longer lags, the extratropical maxima remain distinct, but the minima shift westward over the continents and cover a broader area, as the autocorrelation approaches zero with increasing lag. Values remain high over the tropics, where height anomalies tend to persist for many days. A comparison of observed autocorrelations with red noise decay suggests that geographical variations in decay rates are associated with the relative importance of baroclinic and barotropic components to the total height variability and with advective effects on the local statistics.
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      Autocorrelation of Northern Hemisphere Geopotential Heights

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4200827
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    • Monthly Weather Review

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    contributor authorGutzler, D. S.
    contributor authorMo, K. C.
    date accessioned2017-06-09T16:04:09Z
    date available2017-06-09T16:04:09Z
    date copyright1983/01/01
    date issued1983
    identifier issn0027-0644
    identifier otherams-60185.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4200827
    description abstractLocal autocorrelation statistics for the Northern Hemisphere geopotential height field are presented for different seasons and tropospheric pressure levels. Values are generally much higher than those calculated from time series of outgoing infrared radiation or eddy heat fluxes. The largest one-day lag autocorrelation values are observed over the polar regions and eastern oceans. Well-defined minima exist off the cast coasts of Asia and North America. The minima are most distinct in winter, and are shifted northward and weaker during summer. Otherwise, the pattern does not change drastically with season. These geographical patterns do not change much with height, but the minima are less sharply defined at upper tropospheric levels. At longer lags, the extratropical maxima remain distinct, but the minima shift westward over the continents and cover a broader area, as the autocorrelation approaches zero with increasing lag. Values remain high over the tropics, where height anomalies tend to persist for many days. A comparison of observed autocorrelations with red noise decay suggests that geographical variations in decay rates are associated with the relative importance of baroclinic and barotropic components to the total height variability and with advective effects on the local statistics.
    publisherAmerican Meteorological Society
    titleAutocorrelation of Northern Hemisphere Geopotential Heights
    typeJournal Paper
    journal volume111
    journal issue1
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1983)111<0155:AONHGH>2.0.CO;2
    journal fristpage155
    journal lastpage164
    treeMonthly Weather Review:;1983:;volume( 111 ):;issue: 001
    contenttypeFulltext
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