SOME ASPECTS OF THE DANUBE DELTA BIOCLIMATE

Elena Teodoreanu, Ecological University, Bucharest, Romania

Abstract

Delta specific geographical environment, climate, surface water and vegetation caused very specific bioclimate compared to plains and surrounding hills and the more distant regions with higher altitudes. To highlight the particularities of bioclimate were analyzed totaling some bioclimatic indices climatic characteristics to be in determining the relationship between climate and body. Thus were analyzed monthly mean values of stress skin, based on temperature and wind speed and stress lung, caused by water vapor pressure and average annual total bioclimatic stress, a result of previous summation. Annual mean values show a moderate skin stress, resulting in relatively large amounts of dynamics, but also moderate air temperatures of surface waters. Instead lung stress is high, due to the large amount of standing water vapor in the air. Consequently the total bioclimatic stress is high compared to other regions of the country. Also were taken into account the values ​​of maximum thermal comfort heating time of year, July respectively, at 13, comfort based on hourly values ​​of temperature, relative humidity, wind speed and solar radiation. The calculation of this index shows, in a summer month, an average number of days with thermal comfort, a few days with discomfort both by heating and by cooling, but the maximum number of days of discomfort by wind. Frequency analysis of class time allowed bioclimatic characterization of the seasons, to establish the most favorable weather types to make natural cure beachfront spa and leisure tourism in the Danube Delta. Classes such warm and sunny, favorable physiological relaxation therapy and presents, in the summer months, high frequencies of 70-80%, while in winter relatively warm prevailing class, passing the 0°C temperature and cold classes have a frequency only 10-15%. We are discussing the adaptation of people moving here in different seasons at Delta specific conditions. High air humidity and wind speed are factors in determining bioclimatic stress and thermal discomfort, but thermal inertia and the high solar radiation increases the thermal comfort.