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Vorticity and pressure anomalies in the western Mediterranean during El NiñO/Southern Oscillation extremes

✍ Scribed by LAITA, MERCEDES; GRIMALT, MIQUEL

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
101 KB
Volume
17
Category
Article
ISSN
0899-8418

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✦ Synopsis

By means of a statistical study of percentiles, applied to bi-monthly seasons of composite 2-year periods centred in the year of occurrence of a warm or cold ENSO extreme, we show the climatic influence of these events on the western Mediterranean area. The study is developed over a 30-year period . The variables used are the number of cyclonic days and the number of days having negative pressure anomalies in the area. Daily sea-level atmospheric pressure data have been used to estimate both daily mean wind and vorticity in the study zone. The main influence found is that after a warm extreme year, during the March-April bi-month, there is a decrease in the number of days with both cyclonic circulation and negative

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