Temporal behaviour of the annual mean pressure on the northern Spanish plateau between 1945 and 1994
✍ Scribed by Labajo, J. L.; Piorno, A.; Izquierdo, M. J.
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 237 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0899-8418
No coin nor oath required. For personal study only.
✦ Synopsis
The present work analyses the behaviour of the annual mean atmospheric pressure from 1945 to 1994 as recorded at five weather stations on the Northern Spanish Plateau (A ´vila, Leo ´n, Palencia, Salamanca and Soria) to determine the possible existence of abrupt change and trends. The homogeneity of the variances of different parts of the data series is established. The overall trend of annual mean pressure is determined qualitatively for each station by means of statistical tests. Possible points indicating abrupt changes are explored. After the points of change had been established, the subsets that determine them at each station are studied, analysing their trend. The subsets ranging between the change point and the end of the time periods considered present an increasing trend that is quantified with a linear regression test. The results indicate that on the Northern Spanish Plateau annual mean atmospheric pressure underwent an abrupt change around 1972. From that moment on, an increase trend is observed with a value of around 0.06 mmHg year -1 .