THE EVOLUTION OF ANNUAL MEAN TEMPERATURE AND PRECIPITATION QUANTITY VARIABILITY BASED ON ESTIMATED CHANGES BY THE REGIONAL CLIMATIC MODELS

Climatic changes are representing one of the major challenges of our century, these being forcasted according to climate scenarios and models, which represent plausible and concrete images of future climatic conditions. The results of climate models comparison regarding future water resources and temperature regime trend can become a useful instrument for decision makers in choosing the most effective decisions regarding economic, social and ecologic levels. The aim of this article is the analysis of temperature and pluviometric variability at the closest grid point to Cluj-Napoca, based on data provided by six different regional climate models (RCMs). Analysed on 30 year periods (2001-2030,2031-2060 and 2061-2090), the mean temperature has an ascending general trend, with great varability between periods. The precipitation expressed trough percentage deviation shows a descending general trend, which is more emphazied during 2031-2060 and 2061-2090

THE LIQUID PRECIPITATION ABUNDANCE OF THE PRUT BASIN IN JULY 2008

The liquid precipitation abundance of the Prut Basin in July 2008. In the last years, the severe meteorological phenomen, Moldavia included, have increased significantly in intensity, reaching here and there certain thresholds difficult to accept a couple of years ago. This study proposes to marked the role of abundant rainfall that had caused the floods in July 2008 on the Prut river and to identify and to characterize the synoptic situation that favored large amounts of precipitation fall in the period mentioned above. The consequences of exces precipitation periods from July 2008 have led to the increased of the debit river that had produced important floods in North and North-Eastern of Romania on Prut, Siret and Tisa drowned large area of flamand and grassland destroying road infrastructure and even leading to lives lost

Change detection in the cluj forest district using remote sensing and gis application

International audienceThis paper focuses on the testing and comparison of the sensitivity of vegetation indices to determine the changes occurred in forest areas of the Cluj Forest District during the post-socialist period, between 1986 and 2009. Concurrently, the paper pursues to assess the way in which the socioeconomic and social changes have caused alterations of the forest areas. These have been significantly affected by the changes occurred over the past decades, as well as by the increase of the anthropization degree of the natural areas. Remote sensing applications are very efficient tools in detecting and assessing the changes both in space and over time. Two vegetation indices were used-NDVI and SAVI. The results show the spatio-temporal dynamics of the vegetation cover for approximately one third of the area, as the used indices presented decreasing values of up to 35% (NDVI 27%, SAVI 32%). The accuracy of classifying indices in decreasing, increasing and no-change areas is 88.20%, while the Kappa coefficient is 0.82. In addition, user's and producer's accuracy was calculated for each class