IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Wet season Mediterranean precipitation variability: influence of large-scale dynamics and trends
Xoplaki, E.; Gonzalez-Rouco, J.F.; Luterbacher, J.; Wanner, H. (2004). Wet season Mediterranean precipitation variability: influence of large-scale dynamics and trends. Clim. dyn. 23(1): 63-78.
In: Climate Dynamics. Springer: Berlin; Heidelberg. ISSN 0930-7575, more
Peer reviewed article  

Available in  Authors 

    Atmospheric precipitations; MED, Mediterranean [Marine Regions]; Marine

Authors  Top 
  • Xoplaki, E.
  • Gonzalez-Rouco, J.F.
  • Luterbacher, J.
  • Wanner, H.

    The influence of the large-scale atmospheric circulation at several tropospheric levels on wet season precipitation over 292 sites across the Mediterranean area is assessed. A statistical downscaling model is designed with an objective methodology based on empirical orthogonal functions and canonical correlation analysis (CCA) and tested by means of cross-validation. In all 30% of the total Mediterranean October to March precipitation variability can be accounted for by the combination of four large-scale geopotential height fields and sea level pressure. The Mediterranean sea surface temperatures seem to be less relevant to explain precipitation variability at interannual time scale. It is shown that interdecadal changes in the first CCA mode are related to variations in the North Atlantic Oscillation index and responsible for comparable time scale variations of the Mediterranean precipitation throughout the twentieth century. The analysis reveals that since the mid-nineteenth century precipitation steadily increased with a maximum in the 1960s and decreased since then. The second half of the twentieth century shows a general downward trend of 2.2 mm·month–1·decade–1.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors