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dc.contributor.author Sulca, Juan
dc.contributor.author Vuille, Mathias
dc.contributor.author Roundy, Paul
dc.contributor.author Takahashi, Ken
dc.contributor.author Espinoza, Jhan-Carlo
dc.contributor.author Silva, Yamina
dc.contributor.author Zubieta, Ricardo
dc.date.accessioned 2018-09-24T15:28:23Z
dc.date.available 2018-09-24T15:28:23Z
dc.date.issued 2018-08
dc.identifier.govdoc index-oti2018 (NB)
dc.identifier.issn 1477870X
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/3055
dc.description En: Quarterly Journal of the Royal Meteorological Society, (August 2018).
dc.description.abstract "The climatological and large‐scale characteristics of the extreme cold events (ECEs) in the central Peruvian Andes (Mantaro basin (MB)) during austral summer (January–March) are examined using reanalysis, gridded and in‐situ surface minimum temperature (Tmin) data for the 1979‐2010 period. To describe the influence of the Madden‐Julian Oscillation (MJO) on ECEs in the MB, two ECE groups are defined on basis of the sign of the OLR anomalies in the MJO band (30‐100 days, 0‐9 eastward) at (75°W, 12.5°S). Type 1‐ ECEs occur during the suppressed convection phase of the MJO (OLR anomalies ≥ +2 W m‐2) while Type 2‐ECEs occur during the enhanced convection phase of the MJO (OLR anomalies ≤ ‐2 W m‐2). ECEs in the MB are associated with the advection of cold and dry air along the east of the Andes through equatorward propagation of extratropical Rossby wave trains (ERWTs). This cold advection weakens the Bolivian High‐Nordeste Low (BH‐NL) system over South America (SA) at upper‐tropospheric levels. The MJO is an important driver of ECEs in the MB, favoring the cold advection along the Andes during specific MJO phases. 59% of Type‐1 ECE's and 86% of Type‐2 ECE's occur in MJO Phases 7‐2. Type‐1 and 2 ECE's feature a weakened BH over SA at upper‐tropospheric levels. For Type‐1, ERWTs emanate from southeastern Africa in MJO Phases 8‐1 while ERWTs are strenghened when crossing the subtropical southern Pacific Ocean during MJO Phases 2 and 7. With respect to Type‐2, MJO Phases 7‐2 feature circumpolar Rossby wave trains propagation toward SA. Ultimately, MJO Phases 7‐2 induce negative Tmin anomalies over MB, while MJO Phases 3‐6 induce positive Tmin anomalies. El Niño and La Niña strengthen negative Tmin anomalies over the MB during MJO Phases 7‐8 while they weaken positive Tmin anomalies over the MB during MJO Phases 3‐6." es_ES
dc.format application/pdf es_ES
dc.language.iso en es_ES
dc.publisher Quarterly Journal of the Royal Meteorological Society es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Climatología--Perú-Observaciones es_ES
dc.subject Perú--Clima--Observaciones es_ES
dc.subject Andes--Clima es_ES
dc.subject Cambio climático es_ES
dc.subject Corriente El Niño--Perú es_ES
dc.subject Corriente La Niña--Perú es_ES
dc.subject Meteorología--Perú es_ES
dc.subject Cultivos y clima--Perú es_ES
dc.subject Heladas--Andes--Perú es_ES
dc.title Climatology of extreme cold events in the Central Peruvian Andes during austral Summer: Origin, types and teleconnections es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Climatología es_ES
dc.subject.ocde Región andina es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Estaciones del año es_ES
dc.subject.ocde Meteorología es_ES
dc.identifier.journal Quarterly Journal of the Royal Meteorological Society es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1002/qj.3398 es_ES

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