National Institute of Geophysics, Geodesy and Geography-
Bulgarian Academy of Science
National Institute of Meteorology and Hydrology

BULGARIA

SOFIA

PLOVDIV

VARNA
Nitrogen Dioxide (NO2) Ozone
(O3) 		Sulfur Dioxide
(SO2) 		Fine Particulate Matter(PM10) Fine Particulate Matter(PM2.5) Air Quality Index
(AQI) 		Dominant pollutant (DPI) Universal Thermal Climate Index (UTCI)
03Apr04Apr05Apr

Within the framework of the National Scientific Program " Environmental Protection and Reduction of Risks of Adverse Events and Natural Disasters" funded by the Ministry of Education and Science, the System for Chemical Weather Forecast (air pollution) was created. The System present the 72 hours forecast for surface air pollution in real-time, starting from 00:00 of the current day and extending two more days ahead for the territory of Bulgaria, with a spatial resolution of 3 km and for three selected cities - Sofia, Plovdiv, and Varna, with a resolution of 1 km each.

For each of the mentioned domeins, one of the five main pollutants can be selected - Nitrogen Dioxide (NO2), Ozone (O3), Sulfur Dioxide (SO2), Fine Particulate Matter with a diameter below 10 µm (PM10), Fine Particulate Matter with a diameter below 2.5 µm (PM2.5), from which the Air Quality Index (AQI) is calculated and visualized. The system also forecasts the Universal Thermal Comfort Index (UTCI), indicating the thermal comfort/discomfort of the human body.

Dominant pollutant (DPI):

0-1: Nitrogen Dioxide (NO2)
1-2: Ozone (O3)
2-3: Sulfur Dioxide (SO2)
3-4: Fine Particulate Matter (PM10)
4-5: Fine Particulate Matter (PM2.5)
General conditions (Terms of Use): This information about the data values visualized through graphs is preliminary and should not be considered as a final, accurate and / or complete, and cannot be compared to the norms. The parameters of the presented data are numerically simulated based on the analysis of the latest data available. New data acquisition may result in changes of the concentrations and the parameters of the atmosphere. This is numerically simulated, not a measured values and should not be copied or used by third parts. Whoever uses this data in any way takes full responsibility and may not relay on it or pursue any claims.