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Windfalls are caused by the interaction of several factors and occur in a meteorological context characterized mainly by high wind speeds. In the present study we tried to develop a method for predicting windfalls in a test region, determining areas of high susceptibility of this climatic risk. For this purpose we evaluated parameters regarding the morphometric (slope, exposition, altitude) and morphological (mountain side concavity/convexity, slope break) properties of the relief, the types of forest and the soil on which these grow. We gave susceptibility scores for each parameter considered, resulting in a series of classified layers. These were subsequently added up to form the final cartographic material which highlights the vulnerable areas. For validating the results we utilised LandSat images from different time periods. The existence of a major windfalls event in the studied region (March 2002) allowed us to compare the situation before and after the event, and to check if there is a correlation with the model developed in this analysis. On the basis of this study it may be possible to predict the future evolution of trees susceptibility to windfall which could be helpful in establishing silvic measures to be implemented in order to minimize the damage caused by these phenomena.

This workpaper analyzes two episodes of blizzard snow, which affected the Northern part of Moldavia, the counties Suceava and Botoșani, in the half of December, 2012. It shows the violent beginning of the first episode of blizzard (9-12th of December 2012), which came after the first decade of a gentle December. It had consequences for the transport of Botoșani county (shuting down the traffic routes in the East and North of the county and in a proportion of 75 percent in the rest of the county) and also it affected the central and East part of Suceava county. Apart from transports, these episodes of blizzard leaded to blocking in case of old persons, deprived of power, and because of the traffic routes, lack medical crews to give them first aid, closing the schools, shops (lack of input raw materials supply) etc. What is desirable to point out more in this article, apart from the risks mentioned earlier, it is the synoptic context, who favored the production of these two episodes of blizzard, amount of precipitation fallen on the average and maximum speed of the wind, temperature, maximum and minimum felt of the human body (cooling index) and the climatic risks resulted.

This paper presents the general aspects linked with the atmospheric circulation and how to determine the air-circulation types based upon the 'Hess-Brezowsky' concept over the northern part of Moldova to get in an easily way the pluvial risks. Once the classification is done, there were shown the evolution of atmospheric circulation from the annual to seasonal level by weights. In the wake of study into the studied area, the most representative types were Through over Central Europe; followed by those from North-Westerly Cyclonic; Westerly Cyclonic; and South-Westerly Cyclonic. Also, during the cold half-yearly, by importance was North-Easterly into Anti-Cyclonic type. [ABSTRACT FROM AUTHOR]

This workpaper analyzes two episodes of blizzard snow, which affected the Northern part of Moldavia, the counties Suceava and Botoşani, in the half of December, 2012. It shows the violent beginning of the first episode of blizzard (9-12th of December 2012), which came after the first decade of a gentle December. It had consequences for the transport of Botoşani county (shuting down the traffic routes in the East and North of the county and in a proportion of 75 percent in the rest of the county) and also it affected the central and East part of Suceava county. Apart from transports, these episodes of blizzard leaded to blocking in case of old persons, deprived of power, and because of the traffic routes, lack medical crews to give them first aid, closing the schools, shops (lack of input raw materials supply) etc. What is desirable to point out more in this article, apart from the risks mentioned earlier, it is the synoptic context, who favored the production of these two episodes of blizzard, amount of precipitation fallen on the average and maximum speed of the wind, temperature, maximum and minimum felt of the human body (cooling index) and the climatic risks resulted. [ABSTRACT FROM AUTHOR]