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Cut-off low altitude cyclones (COLs) are characterized by the presence of small cold air masses detached from the polar vortex as a consequence of Rossby waves development. Their displacement at a lower latitude is capable to induce higher atmospheric instability and they have a great influence on the amount of precipitation over Romania between April and September. This paper is based on the analysis from a synoptic point of view of the days when the precipitation amount was greater than 10 mm between 1961 and 20...

At European level it has been underlined the fact that the influence of climate changes on the productivity of the Scots pine will have a significant negative impact, which will lead in turn to important economic losses. According to the IUCN classification, in some vegetation areas from Romania, the Scots pine presents a high vulnerability to climate changes. Taking into account that the analysis of tree rings offers objective information on the way trees react to climate variation at spatial and temporal level, ...