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| Titel |
Trends in precipitation: analysis of long annual and monthly time series from mainland Portugal |
| VerfasserIn |
M. I. P. Lima, S. C. P. Carvalho, J. L. M. P. Lima, M. F. E. S. Coelho |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Precipitation: Measurement, Climatology, Remote Sensing, and Modeling (EGU Session 2009) ; Nr. 25 (2010-06-10), S.155-160 |
| Datensatznummer |
250015750
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| Publikation (Nr.) |
 copernicus.org/adgeo-25-155-2010.pdf |
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| Zusammenfassung |
| The purpose of this work is to investigate trends in
annual and monthly precipitation in mainland Portugal by studying long time
series. The data are from ten measuring stations scattered over mainland
Portugal; some of the time series date back from the 19th century.
Trends in these precipitation series were examined using the Mann-Kendall
non-parametric trend test and the Sen's non-parametric method. Both full
monotonic trends (i.e., over the record period) and partial trends were
investigated. Results provide no evidences for rejecting the null hypothesis
of no trend in annual precipitation, when a monotonic linear model was used.
On the other hand, the analyses of partial trends in the time series
identified a sequence of alternating decreasing and increasing trends in
annual precipitation, which are sometimes statistically significant. This
type of behaviour was also observed for the monthly precipitation. |
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