Show simple item record

dc.creatorMaldonado Mora, Tito José
dc.creatorAlfaro Martínez, Eric J.
dc.creatorRutgersson, Anna
dc.creatorAmador Astúa, Jorge Alberto
dc.date.accessioned2018-02-13T21:53:23Z
dc.date.available2018-02-13T21:53:23Z
dc.date.issued2016
dc.identifier.citationhttp://onlinelibrary.wiley.com/doi/10.1002/joc.4958/abstract;jsessionid=978AE674CA53C7EE82F12C752FA7FAB8.f01t02es_ES
dc.identifier.issn1097-0088
dc.identifier.urihttp://hdl.handle.net/10669/74091
dc.description.abstractWe explored the relationship between the precipitation anomalies during May to June as the first peak of the rainy season in the Pacific slope of Central America, and sea surface temperature (SST) fluctuations in the surrounding oceans, using canonical correlation analysis (CCA). With this approach, we studied variations in total precipitation, frequency of rainy days and the monthly occurrence of days with rainfall above (below) the 80th (20th) percentile, due to changes in the nearby SST. Composites of the sea-level pressure (SLP), geopotential heights (200 hPa), relative humidity (700 hPa), horizontal moisture flux and wind at 850 hPa were estimated to provide a dynamical analysis. The composites are calculated using the information obtained with CCA. In addition, we used a general circulation model forced with fixed SST to explore the sensitivity of the model to the SST patterns found using CCA. The results show that the SST over the tropical North Atlantic controls the precipitation fluctuations at interannual scales, due to its connection with the tropical upper tropospheric trough. Warmer (colder) temperatures result in SLP below normal in the Caribbean region, associated with an increase in the heights at 200 hPa. This vertical configuration reduces the wind shear between 850 and 200 hPa and increases the input of humidity to mid-levels, creating favourable conditions for deep convection, and favouring the generation of tropical cyclone activity. In the Pacific, a positive anomalous low-level moisture flux is observed from the ocean to the continental parts of the region and may enhance the formation of mesoscale systems. The classic prediction schemes show a lead time of 1 or 2 months; this is an advantage for climate services operative work. The atmospheric model outcomes replicate the main results found in the composite analysis, reflecting its potential use for model output statistics predictive schemes.es_ES
dc.description.sponsorshipUniversidad de Uppsala/[54100006]//Sueciaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-A9-532]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B0-065]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B0-130]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B3-600]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B4-226]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B4-227]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B6-143]/UCR/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[805-B5-296]/UCR/Costa Ricaes_ES
dc.language.isoen_USes_ES
dc.sourceInternational Journal of Climatology, Vol. 37, Núm. 9, 2016es_ES
dc.subjectSeasonal climate predictiones_ES
dc.subjectCentral Americaes_ES
dc.subjectTropical North Atlantices_ES
dc.subjectSea surface temperaturees_ES
dc.subjectCanonical correlation analysises_ES
dc.subjectHeavy rainfall eventses_ES
dc.titleThe early rainy season in Central America: the role of thetropical North Atlantic SSTses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeArtículo científicoes_ES
dc.identifier.doi10.1002/joc.4958
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigaciones Geofísicas (CIGEFI)es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Físicaes_ES
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias del Mar y Limnología (CIMAR)es_ES
dc.identifier.codproyecto805-B0-065
dc.identifier.codproyecto805-B0-130
dc.identifier.codproyecto805-A9-532
dc.identifier.codproyecto805-B3-600
dc.identifier.codproyecto805-B4-226
dc.identifier.codproyecto805-B4-227
dc.identifier.codproyecto805-B6-143
dc.identifier.codproyecto805-B5-296


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record