Types de circulation atmosphériques, advection des masses d'air et variations climatiques: Le cas des hivers doux et des hivers rudes récents en Belgique
French
[en] Atmospheric circulation types, air masse advection and climatic variability : Tha case of recent mild and severe winters in Belgium
Erpicum, Michel[Université de Liège - ULg > Département de géographie > Topoclimatologie >]
Mabille, Georges[Université de Liège - ULg > Site Saint-Luc > Site Saint-Luc - Département de géographie >]
[en] temperature variation ; atmospheric circulation types ; severe winters ; mild winters ; Belgium
[fr] variation des températures ; types de circulation atmosphériques ; hivers rudes ; hivers doux ; Belgique
[en] In Belgium, air masse advections -as it appears at 850 hPa level- are very important for the explanation of the surface air temperature of mild winters. Nevertheless in case of severe winters, radiative conditions observed at tropospheric lower level and horizontal motion of very thin air masses (below 850 hPa level) seem to be more important for the explanation of ground level temperature.