The dependency between annual air temperature and solar activity. A case study of Warsaw in 1951–2010
| Autor: | Jolanta Wawer, Jerzy Boryczka, Maria Stopa-Boryczka, Urszula Kossowska-Cezak |
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| Rok vydání: | 2017 |
| Předmět: |
Geography (General)
Dependency (UML) Meteorology interference 0211 other engineering and technologies 021107 urban & regional planning 02 engineering and technology period cold waves Climatology Air temperature regression sinusoid Earth and Planetary Sciences (miscellaneous) G1-922 solar activity heat waves 021101 geological & geomatics engineering |
| Zdroj: | Miscellanea Geographica: Regional Studies on Development, Vol 21, Iss 3, Pp 132-138 (2017) |
| ISSN: | 2084-6118 |
| Popis: | The paper demonstrates a dependency between the annual average daily air temperature course (cycle) in Warsaw and the profile of annual solar activity linked to rotation (with a period of 25–31 days). Waves of cold (ΔT T ≥ 0) were defined as ΔT deviations of daily average temperature (T) using a regression sinusoid f (t) with a period of 365 days. Cold waves were found to generally occur at times of low daily average solar activity (relative to 60-year average), while hot waves tended to coincide with high Wolf numbers. The cycles of the variables were derived using the sinusoid regression method (Boryczka 1998). The maximum sinusoid regression of the annual air-temperature cycle T is delayed by nearly one month vis-à-vis the maximum declination of the Sun. The maximum of the regression sinusoid of daily average Wolf numbers (W) was delayed from the maximum declination by more than two months. |
| Databáze: | OpenAIRE |
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