This study analyses spatial and temporal trends of precipitation and temperatures over Abruzzo Region (central Italy), using historical climatic data from a dense observation network. The results show a general, although not significant, negative trend in the regionally averaged annual precipitation (-1.8% of the yearly mean rainfall per decade). This reduction is particularly evident in winter, especially at mountain stations (average -3% change/decade). Despite this general decreasing trend, a partial rainfall recovery is observed after the 1980s. Furthermore, the majority of meteorological stations register a significant warming over the last 60years, (mean annual temperature increase of +0.15 degrees C/decade), which reflects a rise in both minimum and maximum temperatures, with the latter generally increasing at a faster rate. Spring and summer are the seasons which contribute most to the general temperature increase, in particular at high elevation sites, which exhibit a more pronounced warming (+0.24 degrees C/decade). However, this tendency has not been uniform over 1951-2012, but it has been characterised by a cooling phenomenon in the first 30years (1951-1981), followed by an even stronger warming during the last three decades (1982-2012). Finally, correlations between the climatic variables and the dominant teleconnection patterns in the Mediterranean basin are analysed to identify the potential influence of large-scale atmospheric dynamics on observed trends in Abruzzo. The results highlight the dominant role of the East-Atlantic pattern on seasonal temperatures, while more spatially heterogeneous associations, depending on the complex topography of the region, are identified between winter precipitation and the North Atlantic Oscillation, East-Atlantic and East-Atlantic/Western Russian patterns.
1.Politecn Milan, Dept Civil & Environm Engn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy 2.Univ Aquila, Dept Civil Environm & Architectural Engn, Via G Gronchi 18, I-67100 Laquila, Italy
Recommended Citation:
Scorzini, Anna Rita,Leopardi, Maurizio. Precipitation and temperature trends over central Italy (Abruzzo Region): 1951-2012[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2019-01-01,135(3-4):959-977