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Connection between the large-scale 500 hPa geopotential height fields and precipation over Greece during wintertime.

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Title: Connection between the large-scale 500 hPa geopotential height fields and precipation over Greece during wintertime.
Authors: Xoplaki, E., Luterbacher, J., Burkard, R., Patrikas, I., Maheras, P.
Source: Climate Research. 3/20/2000, Vol. 14 Issue 2, p129. 18p. 35 Diagrams, 6 Graphs.
Subject Terms: *Meteorological precipitation, *Atmospheric circulation, Winter
Geographic Terms: Greece
Abstract: The spatial distribution of the winter (December to February) precipitation over Greece was related to the eastern North Atlantic-European scale mid-tropospheric circulation fields by means of empirical orthogonal functions (EOFs) and canonical correlation analysis (CCA). The data used in this study are winter precipitation totals, of 23 stations, equally distributed over Greece, and winter mean 500 hPa geopotential heights (30 to 70° N, 30°W to 50° E) for the period 1958 to 1994. The Greek precipitation data were found to be homogeneous (Alexandersson test). A decrease of winter precipitation over the whole country was found, although significant (Mann-Kendall trend test) only over the northern and eastern parts and in the western mountainous regions. Three CCA patterns represent links that are very reasonable from a physical point of view. It is supposed that stronger westerlies over the eastern North Atlantic and the raising of the 500 hPa geopotential height (and also the sea level pressure) over continental Europe during the last few decades were connected with enhanced atmospheric stabilization and anomalous advection of cold and dry air from northerly directions. This led to the winter dryness over the eastern Mediterranean. The probable mechanisms and processes in the complex atmosphere-ocean system, leading to the regional anomalous climatic conditions, are discussed. [ABSTRACT FROM AUTHOR]
Copyright of Climate Research is the property of Inter-Research Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Connection between the large-scale 500 hPa geopotential height fields and precipation over Greece during wintertime.
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  Data: <searchLink fieldCode="AR" term="%22Xoplaki%2C+E%2E%22">Xoplaki, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Luterbacher%2C+J%2E%22">Luterbacher, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Burkard%2C+R%2E%22">Burkard, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Patrikas%2C+I%2E%22">Patrikas, I.</searchLink><br /><searchLink fieldCode="AR" term="%22Maheras%2C+P%2E%22">Maheras, P.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Climate+Research%22">Climate Research</searchLink>. 3/20/2000, Vol. 14 Issue 2, p129. 18p. 35 Diagrams, 6 Graphs.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Meteorological+precipitation%22">Meteorological precipitation</searchLink><br />*<searchLink fieldCode="DE" term="%22Atmospheric+circulation%22">Atmospheric circulation</searchLink><br /><searchLink fieldCode="DE" term="%22Winter%22">Winter</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Greece%22">Greece</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The spatial distribution of the winter (December to February) precipitation over Greece was related to the eastern North Atlantic-European scale mid-tropospheric circulation fields by means of empirical orthogonal functions (EOFs) and canonical correlation analysis (CCA). The data used in this study are winter precipitation totals, of 23 stations, equally distributed over Greece, and winter mean 500 hPa geopotential heights (30 to 70° N, 30°W to 50° E) for the period 1958 to 1994. The Greek precipitation data were found to be homogeneous (Alexandersson test). A decrease of winter precipitation over the whole country was found, although significant (Mann-Kendall trend test) only over the northern and eastern parts and in the western mountainous regions. Three CCA patterns represent links that are very reasonable from a physical point of view. It is supposed that stronger westerlies over the eastern North Atlantic and the raising of the 500 hPa geopotential height (and also the sea level pressure) over continental Europe during the last few decades were connected with enhanced atmospheric stabilization and anomalous advection of cold and dry air from northerly directions. This led to the winter dryness over the eastern Mediterranean. The probable mechanisms and processes in the complex atmosphere-ocean system, leading to the regional anomalous climatic conditions, are discussed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Climate Research is the property of Inter-Research Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3354/cr014129
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      – Code: eng
        Text: English
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        PageCount: 18
        StartPage: 129
    Subjects:
      – SubjectFull: Meteorological precipitation
        Type: general
      – SubjectFull: Atmospheric circulation
        Type: general
      – SubjectFull: Winter
        Type: general
      – SubjectFull: Greece
        Type: general
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              Text: 3/20/2000
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              Y: 2000
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