Changes in seasonal mean maximum air temperature in Romania and their connection with large-scale circulation.

Investigates the temporal and spatial variability of the seasonal mean of maximum air temperature in Romania and its links with the large?scale atmospheric circulation. Significant increasing trends were found for winter and summer mean maximum temperature in Romania, with upward shifts around 1947 and 1985 respectively. During autumn, a decreasing trend with a downward shift around 1969 was detected. These changes seem to be real, since they are connected to similar changes in the large-scale circulation. The intensification of the southwesterly circulation over Europe since 1933, which overlapped with the enhancement of westerly circulation after the 1940s, could be the reason for the change in winter mean maximum temperature.