Ekaterina Koleva National Institute of Meteorology and Hydrology, Sofia, Bulgaria Ekaterina.Koleva@meteo.bg   Abstract The standard climate means presently used as climate reference are for the period 1961-1990 recommended by the SMO. These means are used to understand average climate conditions at any location and as consistent point of reference. The 30-years averages are used to […]

2010-704 ANALYSIS OF CLIMATE CONDITIONS IN THE REGION OF POMORIE LAKEPlamen Videnov 1, Anna Tzenkova-Bratoeva 1, Ekaterina Koleva 1, Julia Ivancheva 11 National Institute of Meteorology and Hydrology, Bulgaria Abstract:In the frame of the elaboration of management plan of the protected zone of Pomorie lake the local climate condition in the area has to be […]

2010-210 ANALYSIS OF AIR TEMPERATURE VARIATIONS IN BULGARIAEkaterina KolevaNational Institute of meteorology and hydrology, Bulgaria Abstract:A long-term air temperature fluctuation in Bulgaria is examined. The seasonal and annual mean, maximum and minimum air temperatures are used to study these fluctuations. In analysis the emphasis are on the existence of trends and periodicity in the time […]

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 […]

240 – Analysis of winter climatological parameters in Rila mountain Zornitza Krasteva, Ekaterina KolevaNational Institute of Meteorology and Hydrology, 66 Tzarigradsko shouse blvd.,  Sofia, BulgariaE-mail: Ekaterina.Koleva@meteo.bg Abstract: Mountain climate is one of the essential factors influencing tourism, which is the very important field of economy. Tourism is important also for human entertainment, relaxation and recreation. Due […]

275 – An estimation of the global solar radiation over Bulgaria   Julia Ivancheva, Ekaterina KolevaNational Institute of Meteorology and Hydrology, Sofia, Bulgaria   Abstract:   The sun is the main source of energy for life on Earth. That is why some knowledge of the distribution and amount of solar radiation has a great importance […]

A-322 : Excessive and abundant rains in the region of Sofia and its surroundings     Ekaterina Koleva National Institute of Meteorology and Hydrology Ekaterina.Koleva@meteo.bg         Abstract   Besides the abundant continued rainfalls ( including the bigger part of ÷ŕńň of the twenty-four-hour period , and, at times more ) , of […]

  BALWOIS 2004 Ohrid, Macedonia, 25-29 May 2004   WINTER CLIMATE VARIABILITY AND CLASSIFICATION IN THE BULGARIAN MOUNTAINOUS REGIONS   Nadezhda Petkova, Ekaterina Koleva National Institute of Meteorology and Hydrology, Sofia, BULGARIA Nadejda.Petkova@meteo.bg The problems of snowiness and thermal conditions of winters are of high interest of investigations because of the more frequent droughts, occurred […]

  BALWOIS 2004 Ohrid, Macedonia, 25-29 May 2004   DROUGHT PERIODS DURING XXTH CENTURY   Ekaterina Koleva, Vesselin Alexandrov, Nikola Slavov National Institute of Meteorology and Hydrology Tzarigradsko shosse, 66 Sofia, BULGARIA Ekaterina.Koleva@meteo.bg The drought problem always exists somewhere in the world so that the economy of some nation or nations is always being adversely […]