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A 60-year time series analyses of the upwelling along the Portuguese Coast

2019Journal article Open access
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dc.contributor.authorLeitão, Francisco
dc.contributor.authorBaptista, Vânia
dc.contributor.authorVieira, Vasco
dc.contributor.authorLaginha Silva, Patrícia
dc.contributor.authorRelvas, Paulo
dc.contributor.authorTeodosio, M A
dc.date.accessioned2019-08-01T11:41:33Z
dc.date.available2019-08-01T11:41:33Z
dc.date.issued2019
dc.description.abstractCoastal upwelling has a significant local impact on marine coastal environment and on marine biology, namely fisheries. This study aims to evaluate climate and environmental changes in upwelling trends between 1950 and 2010. Annual, seasonal and monthly upwelling trends were studied in three different oceanographic areas of the Portuguese coast (northwestern-NW, southwestern-SW, and south-S). Two sea surface temperature datasets, remote sensing (RS: 1985-2009) and International Comprehensive Ocean-Atmosphere Data Set (ICOADS: 1950-2010), were used to estimate an upwelling index (UPWI) based on the difference between offshore and coastal sea surface temperature. Time series analyses reveal similar yearly and monthly trends between datasets A decrease of the UPWI was observed, extending longer than 20 years in the NW (1956-1979) and SW (1956-1994), and 30 years in the S (1956-1994). Analyses of sudden shifts reveal long term weakening and intensification periods of up to 30 years. This means that in the past 60 years a normal climate UPWI occurred along the Portuguese coast. An intensification of UPWI was recorded in recent decades regardless of the areas (RS: 1985-2009). Such an intensification rate (linear increase in UPWI) is only significant in S in recent decades (increase rate: ICOADS = 0.02 degrees C decade-1; RS = 0.11 degrees C decade-1) while in NW and SW the increase rate is meaningless. In NW more stable UPWI conditions were recorded, however average UPWI values increased in autumn and winter in NW in recently decades (RS: 1985-2009). An intensification rate of UPWI was recorded during summer (July, August and September) in SW and S in latter decades (RS: 1985-2009). The average UPWI values increased in recent decades in autumn in S. Marked phenological changes were observed in S in summer (before downwelling conditions prevail whilst recently when UPWI regimes prevail) with UPWI seasonal regime in S in recent decades becoming similar to those found in SW and NW. Results of this work can contribute to a better understanding of how upwelling dynamics affect/are correlated with biological data.pt_PT
dc.description.sponsorshipAgência financiadora FCT-Foundation for Science and Technology UID/Multi/04326/2019 CLIMFISH project-A framework for assess vulnerability of coastal fisheries to climate change in Portuguese n2/SAICT/2017t-SAICTpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doihttps://doi.org/10.3390/w11061285pt_PT
dc.identifier.issn2073-4441
dc.identifier.urihttp://hdl.handle.net/10400.1/12712
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationCentre of Marine Sciences
dc.relationInfluence of oceanography and larvae behaviour on recruitment of temperate fishes: The importance of physics–biology links to manage fisheries at a local scale
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectIberian Portuguese coastpt_PT
dc.subjectClimate normalpt_PT
dc.subjectSudden shiftspt_PT
dc.subjectUpwelling trendspt_PT
dc.subjectSeasonal changespt_PT
dc.titleA 60-year time series analyses of the upwelling along the Portuguese Coastpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre of Marine Sciences
oaire.awardTitleInfluence of oceanography and larvae behaviour on recruitment of temperate fishes: The importance of physics–biology links to manage fisheries at a local scale
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04326%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F84666%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F104209%2F2014/PT
oaire.citation.issue6pt_PT
oaire.citation.startPage1285pt_PT
oaire.citation.titleWaterpt_PT
oaire.citation.volume11pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamSFRH
person.familyNameLeitão
person.familyNameBaptista
person.familyNameLaginha Silva
person.familyNameRelvas
person.familyNameTeodosio
person.givenNameFrancisco
person.givenNameVânia
person.givenNamePatrícia
person.givenNamePaulo
person.givenNameMaria
person.identifier620214
person.identifier479502
person.identifier.ciencia-id3E1C-DBC2-42D5
person.identifier.ciencia-id0C1F-4F1B-256B
person.identifier.ciencia-id2412-1F65-A044
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.orcid0000-0003-4983-9782
person.identifier.orcid0000-0002-1428-3334
person.identifier.orcid0000-0001-6052-3805
person.identifier.orcid0000-0002-6404-5895
person.identifier.orcid0000-0002-0939-9885
person.identifier.ridM-3980-2013
person.identifier.ridH-3679-2018
person.identifier.ridB-1257-2008
person.identifier.ridB-5077-2013
person.identifier.scopus-author-id7003991946
person.identifier.scopus-author-id55820032600
person.identifier.scopus-author-id6505976206
person.identifier.scopus-author-id56196396700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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