Publication of Astronomical Observatory of Belgrade, Vol. 105, 2024, Page 30, https://doi.org/10.69646/14sbac27a
BOOK OF ABSTRACTS: XIV Serbian-Bulgarian Astronomical Conference, 23 - 27 September, 2024, Vrnjačka Banja, Serbia. Editors: Milan S. Dimitrijević, Evgeni Semkov, Zoran Simić, Goran Damljanović, Momchil Dechev

Rich archive of meteorological observations from different stations on the territory of Bulgaria, digitalized and analyzed. The main source of data is the yearbook of the National Institute of Meteorology and Hydrology by the Ministry of Environment and Water for the period of 1900 to 2023. This is the most complete as well as the only trustworthy source of data for obtaining scientific results. Our mathematical analysis is based on the monthly average value of temperature and precipitation. For the mathematical analysis we have used mainly software packages of MATLAB. For the digitalization we have used optical character recognition (OCR) packages such as Tesseract and Textract (from Amazon Web Services). Our results are oriented in search of connections between various factors influencing locally short term as well as centennially of the analyzed parameters.