Publicação
Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation
| Resumo: | Landslides occurred in the Lisbon area during the last 50 years were almost always induced by rainfall and have been used to establish rainfall thresholds for regional landslide activity. In 2006, three new rainfall-triggered landslide events occurred in the study area, namely on the 20 March, the 25–27 October, and the 28 November. Landslide events occurred in March and October 2006 include shallow translational slides and few debris flows, and the corresponding absolute antecedent rainfall was found to be above the threshold for durations ranging from 4 to 10 days. These events also fit the combined threshold of daily precipitation and 5 days calibrated antecedent rainfall values. Likewise the landslide event that took place in late November 2006 includes some slope movements with deeper slip surfaces, when compared with landslides dating from March and October. Moreover, the corresponding absolute antecedent rainfall was also found to be above the 40-day period rainfall threshold. Here we characterize in detail the short and long-term atmospheric circulation conditions that were responsible for the intense rainfall episodes that have triggered the corresponding landslide events. It is shown that the three rainfall episodes correspond to considerably different synoptic atmospheric patterns, with the March episode being associated to an intense cut-off low system while the October and November episodes appear to be related to more typical Atlantic low pressure systems (and associated fronts) travelling eastwards. Finally, we analyse the role played by the North Atlantic Oscillation (NAO) during those months marked by landslide activity. It is shown that the NAO index was consistently negative (usually associated with above average precipitation) for the months prior to the landslide events, i.e. between October 2005 and March 2006, and again between August and October 2006. |
|---|---|
| Autores principais: | Zêzere, José |
| Outros Autores: | Trigo, R. M.; Fragoso, Marcelo; Oliveira, Sérgio; Garcia, Ricardo A C |
| Assunto: | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| Ano: | 2008 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| _version_ | 1865920792744689664 |
|---|---|
| author | Zêzere, José |
| author2 | Trigo, R. M. Fragoso, Marcelo Oliveira, Sérgio Garcia, Ricardo A C |
| author2_role | author author author author |
| author_facet | Zêzere, José Zêzere, José Trigo, R. M. Fragoso, Marcelo Oliveira, Sérgio Garcia, Ricardo A C Trigo, R. M. Fragoso, Marcelo Oliveira, Sérgio Garcia, Ricardo A C |
| author_role | author |
| contributor_name_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| country_str | PT |
| creators_json_str | [{\"Person.name\":\"Zêzere, José\",\"Person.identifier.orcid\":\"0000-0002-3953-673X\"},{\"Person.name\":\"Trigo, R. M.\"},{\"Person.name\":\"Fragoso, Marcelo\",\"Person.identifier.orcid\":\"0000-0001-7272-3089\"},{\"Person.name\":\"Oliveira, Sérgio\",\"Person.identifier.orcid\":\"0000-0003-0883-8564\"},{\"Person.name\":\"Garcia, Ricardo A C\",\"Person.identifier.orcid\":\"0000-0002-1036-6271\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| datacite.creators.creator.creatorName.fl_str_mv | Zêzere, José Trigo, R. M. Fragoso, Marcelo Oliveira, Sérgio Garcia, Ricardo A C |
| datacite.date.Accepted.fl_str_mv | 2008-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2019-02-18T15:06:29Z |
| datacite.date.embargoed.fl_str_mv | 2019-02-18T15:06:29Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| datacite.titles.title.fl_str_mv | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| dc.contributor.none.fl_str_mv | Repositório Científico de Acesso Aberto da ULisboa |
| dc.creator.none.fl_str_mv | Zêzere, José Trigo, R. M. Fragoso, Marcelo Oliveira, Sérgio Garcia, Ricardo A C |
| dc.date.Accepted.fl_str_mv | 2008-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2019-02-18T15:06:29Z |
| dc.date.embargoed.fl_str_mv | 2019-02-18T15:06:29Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10451/37040 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Copernicus Publications |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| dc.title.fl_str_mv | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Landslides occurred in the Lisbon area during the last 50 years were almost always induced by rainfall and have been used to establish rainfall thresholds for regional landslide activity. In 2006, three new rainfall-triggered landslide events occurred in the study area, namely on the 20 March, the 25–27 October, and the 28 November. Landslide events occurred in March and October 2006 include shallow translational slides and few debris flows, and the corresponding absolute antecedent rainfall was found to be above the threshold for durations ranging from 4 to 10 days. These events also fit the combined threshold of daily precipitation and 5 days calibrated antecedent rainfall values. Likewise the landslide event that took place in late November 2006 includes some slope movements with deeper slip surfaces, when compared with landslides dating from March and October. Moreover, the corresponding absolute antecedent rainfall was also found to be above the 40-day period rainfall threshold. Here we characterize in detail the short and long-term atmospheric circulation conditions that were responsible for the intense rainfall episodes that have triggered the corresponding landslide events. It is shown that the three rainfall episodes correspond to considerably different synoptic atmospheric patterns, with the March episode being associated to an intense cut-off low system while the October and November episodes appear to be related to more typical Atlantic low pressure systems (and associated fronts) travelling eastwards. Finally, we analyse the role played by the North Atlantic Oscillation (NAO) during those months marked by landslide activity. It is shown that the NAO index was consistently negative (usually associated with above average precipitation) for the months prior to the landslide events, i.e. between October 2005 and March 2006, and again between August and October 2006. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorio.ulisboa.pt/bitstreams/576c0fca-ece1-4a70-8dd1-63e80b5f284f/download |
| id | ul_4e6376fb71d22129d970bfa493c5eaa0 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10451/37040 |
| instacron_str | ul |
| institution | Universidade de Lisboa |
| instname_str | Universidade de Lisboa |
| language | eng |
| network_acronym_str | ul |
| network_name_str | Repositório da Universidade de Lisboa |
| oai_identifier_str | oai:repositorio.ulisboa.pt:10451/37040 |
| organization_str_mv | urn:organizationAcronym:ul |
| person_str_mv | Zêzere, José Zêzere, José https://www.ciencia-id.pt/511D-EE6B-47E3 511D-EE6B-47E3 http://orcid.org/0000-0002-3953-673X 0000-0002-3953-673X Trigo, R. M. Fragoso, Marcelo Fragoso, Marcelo https://www.ciencia-id.pt/701B-F3F7-5673 701B-F3F7-5673 http://orcid.org/0000-0001-7272-3089 0000-0001-7272-3089 Oliveira, Sérgio Oliveira, Sérgio https://www.ciencia-id.pt/1B10-8CE2-1F13 1B10-8CE2-1F13 http://orcid.org/0000-0003-0883-8564 0000-0003-0883-8564 Garcia, Ricardo A C Garcia, Ricardo A C https://www.ciencia-id.pt/BC12-77B6-7801 BC12-77B6-7801 http://orcid.org/0000-0002-1036-6271 0000-0002-1036-6271 |
| publishDate | 2008 |
| publisher.none.fl_str_mv | Copernicus Publications |
| reponame_str | Repositório da Universidade de Lisboa |
| repository_id_str | urn:repositoryAcronym:ul |
| service_str_mv | urn:repositoryAcronym:ul |
| spelling | engCopernicus Publicationspt_PTLandslides occurred in the Lisbon area during the last 50 years were almost always induced by rainfall and have been used to establish rainfall thresholds for regional landslide activity. In 2006, three new rainfall-triggered landslide events occurred in the study area, namely on the 20 March, the 25–27 October, and the 28 November. Landslide events occurred in March and October 2006 include shallow translational slides and few debris flows, and the corresponding absolute antecedent rainfall was found to be above the threshold for durations ranging from 4 to 10 days. These events also fit the combined threshold of daily precipitation and 5 days calibrated antecedent rainfall values. Likewise the landslide event that took place in late November 2006 includes some slope movements with deeper slip surfaces, when compared with landslides dating from March and October. Moreover, the corresponding absolute antecedent rainfall was also found to be above the 40-day period rainfall threshold. Here we characterize in detail the short and long-term atmospheric circulation conditions that were responsible for the intense rainfall episodes that have triggered the corresponding landslide events. It is shown that the three rainfall episodes correspond to considerably different synoptic atmospheric patterns, with the March episode being associated to an intense cut-off low system while the October and November episodes appear to be related to more typical Atlantic low pressure systems (and associated fronts) travelling eastwards. Finally, we analyse the role played by the North Atlantic Oscillation (NAO) during those months marked by landslide activity. It is shown that the NAO index was consistently negative (usually associated with above average precipitation) for the months prior to the landslide events, i.e. between October 2005 and March 2006, and again between August and October 2006.application/pdfpt_PTRainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillationPersonalZêzere, JoséDSpacehttp://dspace.org/items/a49d5ad5-533a-4973-b8c6-a4f201b1cf62DSpacehttp://dspace.org/items/a49d5ad5-533a-4973-b8c6-a4f201b1cf62ZêzereJosé LuísCiência IDhttps://www.ciencia-id.pt511D-EE6B-47E3ORCIDhttp://orcid.org0000-0002-3953-673XScopus Author IDhttps://www.scopus.com6507109389Trigo, R. M.PersonalFragoso, MarceloDSpacehttp://dspace.org/items/dd5932d1-bae5-4743-913d-8cfb8d828830DSpacehttp://dspace.org/items/dd5932d1-bae5-4743-913d-8cfb8d828830FragosoMarceloCiência IDhttps://www.ciencia-id.pt701B-F3F7-5673ORCIDhttp://orcid.org0000-0001-7272-3089Researcher IDhttps://www.researcherid.comF-2991-2010Scopus Author IDhttps://www.scopus.com23988281600PersonalOliveira, SérgioDSpacehttp://dspace.org/items/eb79e9a4-db50-4237-8cfa-5ef7a22b243aDSpacehttp://dspace.org/items/eb79e9a4-db50-4237-8cfa-5ef7a22b243aOliveiraSérgioCiência IDhttps://www.ciencia-id.pt1B10-8CE2-1F13ORCIDhttp://orcid.org0000-0003-0883-8564Researcher IDhttps://www.researcherid.comM-8412-2016Scopus Author IDhttps://www.scopus.com24779631800PersonalGarcia, Ricardo A CDSpacehttp://dspace.org/items/3971b2ff-3bd6-4a99-8ea4-857883946cebDSpacehttp://dspace.org/items/3971b2ff-3bd6-4a99-8ea4-857883946cebGarciaR.A.C.Ciência IDhttps://www.ciencia-id.ptBC12-77B6-7801ORCIDhttp://orcid.org0000-0002-1036-6271Researcher IDhttps://www.researcherid.comJ-8719-2013Scopus Author IDhttps://www.scopus.com55454646500Scopus Author IDhttps://www.scopus.com56486676500HostingInstitutionOrganizationalRepositório Científico de Acesso Aberto da ULisboae-mailmailto:repositorio@reitoria.ulisboa.ptrepositorio@reitoria.ulisboa.ptISSNIsPartOf1561-8633ISSNIsPartOf1684-9981DOIIsPartOf10.5194/nhess-8-483-20082019-02-18T15:06:29Z20082008-01-01T00:00:00ZHandlehttp://hdl.handle.net/10451/37040http://purl.org/coar/access_right/c_abf2open accessRainfall-triggered landslidesLisbonNorth Atlantic Oscillation6932500 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal article2008http://creativecommons.org/licenses/by/4.0/http://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ulisboa.pt/bitstreams/576c0fca-ece1-4a70-8dd1-63e80b5f284f/downloadNatural Hazards and Earth System Sciences83483499 |
| spellingShingle | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation Zêzere, José Rainfall-triggered landslides Lisbon North Atlantic Oscillation Zêzere, José Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| status | SINGLETON |
| subject.fl_str_mv | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| title | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| title_full | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| title_fullStr | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| title_full_unstemmed | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| title_short | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| title_sort | Rainfall-triggered landslides in the Lisbon region over 2006 and relationships with the North Atlantic oscillation |
| topic | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| topic_facet | Rainfall-triggered landslides Lisbon North Atlantic Oscillation |
| url | http://hdl.handle.net/10451/37040 |
| visible | 1 |