Fluctuations in the monthly discharge of Guyana Shield rivers, related to Pacific and Atlantic climate variability

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dc.contributor.authorLabat, D.
dc.contributor.authorEspinoza, Jhan Carlo
dc.contributor.authorRonchail, J.
dc.contributor.authorCochonneau, G.
dc.contributor.authorDe Oliveira, E.
dc.contributor.authorDoudou, J. C.
dc.contributor.authorGuyot, J. L.
dc.coverage.spatialGuyana
dc.date.accessioned2018-09-21T11:14:46Z
dc.date.available2018-09-21T11:14:46Z
dc.date.issued2012-06
dc.description.abstractThe discharge variability of the main rivers that drain the Guyana Shield is analysed over the last 50 years using cross-wavelet, coherence and composite analysis involving oceanic and atmospheric variables. We highlight the overall hydro-climatological homogeneity of this region that allowed us to focus on the longest discharge time series available. Therefore, a wavelet cross-analysis was carried out between monthly and seasonal Maroni River discharge at the Langa Tabiki station and selected climate indices. This confirms a strong relationship between the hydrology of the Guyana Shield and the Pacific sea-surface temperature (SST) fluctuations. There is evidence of intermittent influence, of between inter-annual and near decadal scales, of the Atlantic SST fluctuations, in particular around 1970 and 1990. Finally, we show that the links between oceanic regions and high discharge in the rivers of Guyana are realized through the reinforcement of the Walker and Hadley cells between the Amazon and the adjacent oceans and through decreased trade winds and monsoon flux that favour the persistence of humidity over the Guyana Shield.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationLabat, D., Espinoza, J.-C., Ronchail, J., Cochonneau, G., De Oliveira, E., Doudou, J. C., & Guyot, J.-L. (2012). Fluctuations in the monthly discharge of Guyana Shield rivers, related to Pacific and Atlantic climate variability.==$Hydrological Sciences Journal, 57$==(6), 1081-1091. https://doi.org/10.1080/02626667.2012.695074es_ES
dc.identifier.doihttps://doi.org/10.1080/02626667.2012.695074es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalHydrological Sciences Journales_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3024
dc.language.isoenges_ES
dc.publisherTaylor & Francises_ES
dc.relation.ispartofurn:issn:0262-6667
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectHydro-climatologyes_ES
dc.subjectWavelet analysises_ES
dc.subjectSST–hydrology connectionses_ES
dc.subjectGuyanaes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.10es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.11es_ES
dc.titleFluctuations in the monthly discharge of Guyana Shield rivers, related to Pacific and Atlantic climate variabilityes_ES
dc.title.alternativeVariations des débits mensuels des fleuves drainant le bouclier guyanais en relation avec la variabilité climatique atlantique et pacifiquees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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