Nadezhda Petkova, Vesselin Alexandrov National Institute of Meteorology and Hydrology – BAS, Sofia, Bulgaria nadejda.petkova@meteo.bg   Abstract An investigation on observed variations and tendencies in annual snow cover duration (SCD) and maximum snow depth (MSD) in the mountainous regions of Bulgaria over the period 1931-2005 was carried out. Drought anomaly index and standardized anomalies of […]

340 – Winter conditions variability in Bulgaria  Nadezhda Petkova, Ekaterina Koleva, Vesselin Alexandrov National Institute of Meteorology and Hydrology – BAS,“Tzarigradsko chaussee” 66 Blvd, BG 1784 Sofia, BulgariaE-mail: Nadejda.Petkova@meteo.bg      Abstract:   Winter climate variability plays a key role in a number of environmental and socioeconomic systems in each country. Understanding these relationships can […]

A-323 : A study on precipitation variability at Iskar and Mesta river basins   Nadejda Petkova, Ekaterina Koleva National Institute of Meteorology and Hydrology, 1784. Sofia , “Tzarigradsko chaussee” 66, Bulgaria , E-mail: Nadejda.Petkova@meteo.bg     Abstract   Precipitation is a key element of the hydrological cycle and climate as well as for productivity of […]