Daily extreme temperature multifractals in Catalonia (NE Spain)
| Autor: | Burgueño, August, Lana Pons, Francisco Javier|||0000-0002-3298-9234, Serra de Larrocha, Carina|||0000-0003-3803-2414, Martínez Santafé, Maria Dolors|||0000-0001-8200-183X |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. Departament de Física Aplicada, Universitat Politècnica de Catalunya. GIES - Geofísica i Enginyeria Sísmica |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya Universitat Jaume I UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | The multifractal character of the daily extreme temperatures in Catalonia (NE Spain) is analyzed by means of the multifractal detrended fluctuation analysis (MF-DFA) applied to 65 thermometric records covering years 1950–2004. Although no clear spatial patterns of the multifractal spectrum parameters appear, factor scores deduced from Principal Component analysis indicate some signs of spatial gradients. Additionally, the daily extreme temperature series are classified depending on their complex time behavior, through four multifractal parameters (Hurst exponent, Hölder exponent with maximum spectrum, spectrum asymmetry and spectrum width). As a synthesis of the three last parameters, a basic measure of complexity is proposed through a normalized Complexity Index. Its regional behavior is found to be free of geographical dependences. This index represents a new step towards the description of the daily extreme temperatures complexity. |
| Databáze: | OpenAIRE |
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