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Key features of cold-air pool episodes in the North-East of the Iberian Peninsula (Cerdanya, Eastern Pyrenees)

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  • Josep Ramon Miró
  • Juan Carlos Pena
  • Dr Nick Pepin
  • Abdelmalik Sairouni
  • Montserrat Aran
Located in the North-East of the Iberian Peninsula, Cerdanya experiences intense Cold-Air Pool (CAP) episodes in which a decoupling between the valley atmosphere and the regional circulation develops, especially in winter. A network of 40 temperature sensors was deployed from 2012 to 2015 along seven elevational transects to collect hourly data of temperature and humidity, enabling the measurement of CAP characteristics and behaviour. Empirical Orthogonal Functions (EOFs) of minimum temperature anomalies were examined to study the spatial distribution of CAP. Days were classified as CAP or no-CAP using EOF analysis. The temporal variation of EOF analysis scores for the first component (PC1) indicates days prone to CAP. A synoptic analysis using Principal Component Analysis (factorization), cluster analysis (classification) and a Discriminant Analysis (reclassification) was performed successively. Results showed CAP days to be associated with high pressure and light winds, whilst no-CAP days were associated with surface northerly or north-easterly flow behind frontal passages.
Original languageEnglish
Pages (from-to)1105-1115
JournalInternational Journal of Climatology
Issue number3
Early online date14 Aug 2017
Publication statusPublished - 15 Mar 2018


  • Key features of Cold-Air Pool

    Rights statement: This is the peer reviewed version of the following article: Miró, J. R., Peña, J. C., Pepin, N., Sairouni, A. and Aran, M. (2017), Key features of cold-air pool episodes in the northeast of the Iberian Peninsula (Cerdanya, eastern Pyrenees). Int. J. Climatol, which has been published in final form at doi: 10.1002/joc.5236. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

    Accepted author manuscript (Post-print), 400 KB, PDF document

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