Secular Trend of Surface Temperature at an Elevated Observatory in the Pyrenees
| Autor: | J. Dessens, A. Bücher |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | Journal of Climate. 4:859-868 |
| ISSN: | 1520-0442 0894-8755 |
| DOI: | 10.1175/1520-0442(1991)004<0859:stosta>2.0.co;2 |
| Popis: | Surface temperature was measured at the Pic du Midi de Bigorre, 2862 m MSL, from the foundation of the Observatory in 1878 until the closing of the meteorological station in 1984. After testing the homogeneity of the series with the annual mean temperatures in western Europe and in southwestern France, the period 1882–1970 was retained for trend analysis. The mean annual temperature increased 0.83°C during the 89-yr period. This increase is the sum of a very significant increase in the daily minimum temperature (+ 2.11°C) and a decrease in the maximum temperature (− 0.45°C). In consequence, the most dramatic change in the temperature regime was the difference between maximum and minimum; this decreased from 8.05°C in 1882 to 5.49°C in 1970. A mean increase is observed in all seasons, but, as for western Europe, it is stronger in spring and fall than in winter and summer. Analysis of cloudiness data for the same period shows a 15% increase in annual mean cloudiness and also significant year-to-yea... |
| Databáze: | OpenAIRE |
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