Vignette d'image

Rebetez, Martine

Nom
Rebetez, Martine
Affiliation principale
Site web
Fonction
Professeure ordinaire
Email
martine.rebetez@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/403
_
0000-0002-3337-2025

Résultat de la recherche

Filtres

3
21
3
Réinitialiser les filtres

Paramètres

Voici les éléments 1 - 3 sur 3
  • Publication
    Accès libre
    Monthly air temperature trends in Switzerland 1901-2000 and 1975-2004
    (2008)
    Rebetez, Martine 
    ;
    Reinhard, Michael
    We analysed long-term temperature trends based on 12 homogenised series of monthly temperature data in Switzerland at elevations between 316 m.a.s.l. and 2490 m.a.s.l for the 20(th) century (1901-2000) and for the last thirty years (1975-2004). Comparisons were made between these two periods, with changes standardised to decadal trends. Our results show mean decadal trends of +0.135 degrees C during the 20(th) century and +0.57 degrees C based on the last three decades only. These trends are more than twice as high as the averaged temperature trends in the Northern Hemisphere. Most stations behave quite similarly, indicating that the increasing trends are linked to large-scale rather than local processes. Seasonal analyses show that the greatest temperature increase in the 1975-2004 period occurred during spring and summer whereas they were particularly weak in spring during the 20(th) century. Recent temperature increases are as much related to increases in maximum temperatures as to increases in minimum temperature, a trend that was not apparent in the 1901-2000 period. The different seasonal warming rates may have important consequences for vegetation, natural disasters, human health, and energy consumption, amongst others. The strong increase in summer temperatures helps to explain the accelerated glacier retreat in the Alps since 1980.
  • Publication
    Métadonnées seulement
    Heat and drought 2003 in Europe: a climate synthesis
    (2006)
    Rebetez, Martine 
    ;
    Mayer, Helmut
    ;
    Dupont, Olivier
    ;
    Schindler, Dirk
    ;
    Gartner, Karl
    ;
    Kropp, Jürgen
    ;
    Menzel, Anette
    Heat and drought were extreme in summer 2003 in Europe. Climatic data show that most extreme were maximum air temperatures in June and August; maps of these two months show a striking similarity in geographical range. Over wide regions, monthly mean temperatures were more than 4 degrees C above the long term mean values. The heat lasted from May to September in large parts of western and central Europe. The lack of precipitation was most severe in summer 2003 but precipitation was generally below normal from February 2003 until June 2004 ( with the exception of two months). Sunshine duration was above normal, particularly in regions which usually have rainy and cloudy episodes in summer, and relative air humidity was below normal during the whole year of 2003. The drought experienced by the vegetation in summer 2003 was exacerbated by the length of the period with scarce precipitation and humidity, by the heat during the summer and by long sunshine duration.
  • Publication
    Métadonnées seulement
    Twentieth century trends in droughts in southern Switzerland
    (1999)
    Rebetez, Martine 
    An investigation is made of the change in frequency of drought episodes in southern Switzerland. Episodes of drought are shown to have increased in frequency and persistence during the 20th century. They have been particularly frequent and long during the 1940s as well as since 1981. As these two periods have also been particularly warm, the results are discussed in relation to the increase in global atmospheric temperatures observed this century.