An assessment of the Jenkinson and Collison synoptic classification to a continental mid-latitude location

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Abstract

A weather-type catalogue based on the Jenkinson and Collison method was developed for an area in south-west Russia for the period 1961--2010. Gridded sea level pressure data was obtained from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. The resulting catalogue was analysed for frequency of individual types and groups of weather types to characterise long-term atmospheric circulation in this region. Overall, the most frequent type is anticyclonic (A) (23.3 {%}) followed by cyclonic (C) (11.9 {%}); however, there are some key seasonal patterns with westerly circulation being significantly more common in winter than summer. The utility of this synoptic classification is evaluated by modelling daily rainfall amounts. A low level of error is found using a simple model based on the prevailing weather type. Finally, characteristics of the circulation classification are compared to those for the original JC British Isles catalogue and a much more equal distribution of flow types is seen in the former classification.
Original languageEnglish
Pages (from-to)731-744
Number of pages14
JournalTheoretical and Applied Climatology
Volume128
Issue number3-4
Early online date28 Jan 2016
DOIs
Publication statusE-pub ahead of print - 28 Jan 2016

Keywords

  • Vorticity
  • Rainfall Amount
  • British Isle
  • Weather Type
  • Circulation Type

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