| Titre | Déficit pluviométrique hivernal sur la France : autopsie de la situation anticyclonique du 19 décembre 1989 au 25 janvier 1990 / The winter rainfall deficiency in France : autopsy of the anticyclonic situation from the 19 December 1989 to the 25 January 1990 | |
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| Auteur | Marcel Leroux | |
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Revue |
Géocarrefour Titre à cette date : Revue de géographie de Lyon |
| Numéro | volume 66, no 3, 1991 A propos de la séquence neigeuse de décembre 1990 : Une approche des évènements extremes | |
| Rubrique / Thématique | Des évènements extremes / ~~Exceptional Events~~ |
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| Page | 197-206 | |
| Résumé anglais |
The 1989-90 winter rainfall deficiency was connected with an unusually long-lived high pressure pattern. Below the anticyclonic cover were observed above normal diurnal temperatures but a strong rainfall deficiency, while the northern and southern borders of the high pressure mass had the advantage of copious rainfall. The immense «European » high does not have a «local » origin, that is to say a thermic continental one, and was not an inert airmass; instead the high pressure was continuously supplied by Polar Mobile Highs (PMH), that is to say thin layered and migratory cold airmasses, originating from the arctic basin. The PMH (a total of 25 out of 39 days) move, either along the western side of Greenland (17 for this «American » path), or along the eastern side (8 for this « Scandinavian » path). Their meeting over Europe and blocking by the PMH which have denser air due to their more direct trajectories provokes an agglutination high pressure cells over Europe. Source : Éditeur (via Persée) |
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| Article en ligne | http://www.persee.fr/web/revues/home/prescript/article/geoca_0035-113x_1991_num_66_3_5785 |
