Publication
Interannual variability of precipitation distribution patterns in Southern Portugal
| datacite.subject.fos | Ciências Naturais::Ciências da Terra e do Ambiente | |
| datacite.subject.sdg | 03:Saúde de Qualidade | |
| datacite.subject.sdg | 07:Energias Renováveis e Acessíveis | |
| datacite.subject.sdg | 11:Cidades e Comunidades Sustentáveis | |
| dc.contributor.author | Mourato, S. | |
| dc.contributor.author | Moreira, M. | |
| dc.contributor.author | Corte‐Real, J. | |
| dc.date.accessioned | 2025-12-04T14:40:06Z | |
| dc.date.available | 2025-12-04T14:40:06Z | |
| dc.date.issued | 2009-09-29 | |
| dc.description.abstract | Southern Portugal is characterized by an irregular distribution of precipitation which is highly variable from year to year, requiring a clear ascertaining if the pattern of the precipitation is changing due to climate variability or climate change. In this paper, the authors applied several statistical methods to annual and seasonal time series of precipitation during the period 1931-2006, in order to detect trends and evaluate the variability in the frequencies of occurrence of dry and wet periods and also to assess spatial distribution patterns. The statistical methods include homogeneity tests, Mann-Kendall test, simple moving averages and cluster analysis. In spring, the authors detected a lack of homogeneity in the precipitation time series and a significant decreasing trend of precipitation was identified, by using simple moving averages and the Mann-Kendall test. Cluster analyses also confirmed the results and identified significant trends in the interannual and spatial distributions of dry, normal and wet years. It is concluded that the annual precipitation regime in the North interior sector is becoming drier, as the winter and spring also become drier. The only season in which a precipitation increase is observed is at fall and near the sea, but even for that region springs are also becoming drier. | eng |
| dc.description.sponsorship | The authors would like to express their warm thanks to the two anonymous reviewers, whose contributions and suggestions greatly improved the content and the quality of the paper. This research was developed under the projects: Desurvey – a surveillance system for assessing and monitoring of desertification (EU Contract IP – 003950); and BioAridRisk – Space-Time Evaluation of the Risks of Climate Change Based on an Aridity Index (POCI/CLI/ 56371/2004). | |
| dc.identifier.citation | Mourato, S., Moreira, M. and Corte-Real, J. (2010), Interannual variability of precipitation distribution patterns in Southern Portugal. Int. J. Climatol., 30: 1784-1794. https://doi.org/10.1002/joc.2021. | |
| dc.identifier.doi | 10.1002/joc.2021 | |
| dc.identifier.eissn | 1097-0088 | |
| dc.identifier.issn | 0899-8418 | |
| dc.identifier.uri | http://hdl.handle.net/10400.8/14872 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Wiley | |
| dc.relation.hasversion | https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.2021 | |
| dc.relation.ispartof | International Journal of Climatology | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | homogeneity | |
| dc.subject | trend analysis | |
| dc.subject | precipitation patterns | |
| dc.subject | clusters techniques | |
| dc.subject | climate variability | |
| dc.title | Interannual variability of precipitation distribution patterns in Southern Portugal | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 1794 | |
| oaire.citation.issue | 12 | |
| oaire.citation.startPage | 1784 | |
| oaire.citation.title | International Journal of Climatology | |
| oaire.citation.volume | 30 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Mourato | |
| person.givenName | Sandra | |
| person.identifier.ciencia-id | C81B-16CD-EDFE | |
| person.identifier.orcid | 0000-0001-9545-2584 | |
| person.identifier.scopus-author-id | 56387285400 | |
| relation.isAuthorOfPublication | 66af47bd-4c47-48ec-8f3a-f6ce092514db | |
| relation.isAuthorOfPublication.latestForDiscovery | 66af47bd-4c47-48ec-8f3a-f6ce092514db |
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- Southern Portugal is characterized by an irregular distribution of precipitation which is highly variable from year to year, requiring a clear ascertaining if the pattern of the precipitation is changing due to climate variability or climate change. In this paper, the authors applied several statistical methods to annual and seasonal time series of precipitation during the period 1931-2006, in order to detect trends and evaluate the variability in the frequencies of occurrence of dry and wet periods and also to assess spatial distribution patterns. The statistical methods include homogeneity tests, Mann-Kendall test, simple moving averages and cluster analysis. In spring, the authors detected a lack of homogeneity in the precipitation time series and a significant decreasing trend of precipitation was identified, by using simple moving averages and the Mann-Kendall test. Cluster analyses also confirmed the results and identified significant trends in the interannual and spatial distributions of dry, normal and wet years. It is concluded that the annual precipitation regime in the North interior sector is becoming drier, as the winter and spring also become drier. The only season in which a precipitation increase is observed is at fall and near the sea, but even for that region springs are also becoming drier.
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