From drought to flooding: understanding the abrupt 2010-11 hydrological annual cycle in the Amazonas River and tributaries

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dc.contributor.authorEspinoza, Jhan Carlo
dc.contributor.authorRonchail, Josyane
dc.contributor.authorGuyot, Jean-Loup
dc.contributor.authorJunquas, Clémentine
dc.contributor.authorDrapeau, Guillaume
dc.contributor.authorMartínez, Jean-Michel
dc.contributor.authorSantini, William
dc.contributor.authorVauchel, Philippe
dc.contributor.authorLavado, Waldo
dc.contributor.authorOrdoñez, Julio
dc.contributor.authorEspinoza Villar, Raúl Arnaldo
dc.coverage.spatialCuenca del río Amazonas
dc.coverage.spatialAmazonía
dc.date.accessioned2018-09-20T19:22:24Z
dc.date.available2018-09-20T19:22:24Z
dc.date.issued2012-04-19
dc.description.abstractIn this work we document and analyze the hydrological annual cycles characterized by a rapid transition between low and high flows in the Amazonas River (Peruvian Amazon) and we show how these events, which may impact vulnerable riverside residents, are related to regional climate variability. Our analysis is based on comprehensive discharge, rainfall and average suspended sediment data sets. Particular attention is paid to the 2010–11 hydrological year, when an unprecedented abrupt transition from the extreme September 2010 drought (8300 m³ s⁻¹) to one of the four highest discharges in April 2011 (49 500 m³ s⁻¹) was recorded at Tamshiyacu (Amazonas River). This unusual transition is also observed in average suspended sediments. Years with a rapid increase in discharge are characterized by negative sea surface temperature anomalies in the central equatorial Pacific during austral summer, corresponding to a La Niña-like mode. It originates a geopotential height wave train over the subtropical South Pacific and southeastern South America, with a negative anomaly along the southern Amazon and the southeastern South Atlantic convergence zone region. As a consequence, the monsoon flux is retained over the Amazon and a strong convergence of humidity occurs in the Peruvian Amazon basin, favoring high rainfall and discharge. These features are also reported during the 2010–11 austral summer, when an intense La Niña event characterized the equatorial Pacific.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationEspinoza, J. C., Ronchail, J., Guyot, J. L., Junquas, C., Drapeau, G., Martinez, J. M., ... Espinoza, R. (2012). From drought to flooding: understanding the abrupt 2010–11 hydrological annual cycle in the Amazonas River and tributaries.==$Environmental Research Letters, 7$==(2), 024008. https://doi.org/10.1088/1748-9326/7/2/024008es_ES
dc.identifier.doihttps://doi.org/10.1088/1748-9326/7/2/024008es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalEnvironmental Research Letterses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3020
dc.language.isoenges_ES
dc.publisherIOP Publishinges_ES
dc.relation.ispartofurn:issn:1748-9326
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectSolimoes Riveres_ES
dc.subjectFloodses_ES
dc.subjectAmazon basines_ES
dc.subjectPerues_ES
dc.subjectDischarge variabilityes_ES
dc.subjectENSOes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.11es_ES
dc.titleFrom drought to flooding: understanding the abrupt 2010-11 hydrological annual cycle in the Amazonas River and tributarieses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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