VARIATIONS OF TEMPERATURE OVER BULGARIA AND THEIR CONNECTION WITH SOLAR CYCLES
Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, DOI: https://doi.org/10.48365/ENVR-2020.1.2
The Sun is the main source of energy for all Earth’s geosystems, including climate, weather, mean sea level, winds, precipitation, and etc., mainly through Total Solar Irradiance (TSI), whose variations during solar activity cause various changes on the Earth surface. Climate processes, interactions between atmosphere-and ocean system, various local, regional and global hydrological cycles are the main mediator between solar activity and a number of geophysical processes on the Earth surface. The temperature at the Earth surface is widely used climate index, whose variations consist of significant seasonal oscillations, trend and long-term cycles. The variations of temperature over Bulgaria is investigated by means of several long time series of meteorological observations. The changes of seasonal components of temperature and long-term oscillations are analyzed in narrow frequency bands by means of the Partial Fourier Approximation. These temperature variations are compared with the corresponding cycles of solar activity in order to create long-term forecast models.
solar activity; temperature; climate variations
This work has been carried out in the framework of the National Science Program “Environmental Protection and Reduction of Risks of Adverse Events and Natural Disasters”, approved by the Resolution of the Council of Ministers № 577/17.08.2018 and supported by the Ministry of Education and Science (MES) of Bulgaria (Agreement № Д01-322/18.12.2019).
Author: Yavor Chapanov
Affiliation: Climate, Atmosphere and Water Research Institute – BAS
How to cite:
Chapanov, Y. (2020). Variations of Temperature over Bulgaria and their Connection with Solar Cycles. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 21-32. https://doi.org/10.48365/ENVR-2020.1.2