The role of ENSO flavours and TNA on recent droughts over Amazon forests and the Northeast Brazil region

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dc.contributor.authorJimenez, Juan C.
dc.contributor.authorMarengo, Jose A.
dc.contributor.authorAlves, Lincoln M.
dc.contributor.authorSulca Jota, Juan Carlos
dc.contributor.authorTakahashi, Ken
dc.contributor.authorFerrett, Samantha
dc.contributor.authorCollins, Matthew
dc.coverage.spatialBrasil
dc.date2019-12-17
dc.date.accessioned2020-02-27T15:54:36Z
dc.date.available2020-02-27T15:54:36Z
dc.date.issued2021-06-15
dc.description.abstractAmazon tropical forests and the semiarid Northeast Brazil (NEB) region have registered very severe droughts during the last two decades, with a frequency that may have exceeded natural climate variability. Severe droughts impact the physiological response of Amazon forests, decreasing the availability to absorb atmospheric CO₂, as well as biodiversity and increasing risk of fires. Droughts on this region also affect population by isolating them due to anomalous low river levels. Impacts of droughts over NEB region are related to water and energy security and subsistence agriculture. Most drought episodes over Amazonia and NEB are associated with El Niño (EN) events, anomalous warming over the Tropical North Atlantic (TNA), and even an overlapping among them. However, not all the dry episodes showed a large‐scale pattern linked to a canonical EN event or warm TNA episodes. For instance, dry episodes linked to EN events present distinct spatial patterns of precipitation anomalies depending on EN type (Central‐Pacific vs. Eastern‐Pacific EN), and NEB region experienced a severe drought in 2012 that is not attributed to EN or warm TNA events. Even in the case of the strong EN in 2015/16, some regional impacts have not been explained by EN contribution. This paper discusses the effects of CP and EP EN events, and the role of warm TNA events on tropical Walker and Hadley circulation leading to drought over Amazonia and NEB regions.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationJimenez, J. C., Marengo, J. A., Alves, L. M., Sulca, J. C., Takahashi, K., Ferrett, S., & Collins, M. (2021). The role of ENSO flavours and TNA on recent droughts over Amazon forests and the Northeast Brazil region.==$International Journal of Climatology, 41$==(7), 3761-3780. https://doi.org/10.1002/joc.6453es_ES
dc.identifier.doihttps://doi.org/10.1002/joc.6453es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalInternational Journal of Climatologyes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/4766
dc.language.isoenges_ES
dc.publisherWileyes_ES
dc.relation.ispartofurn:issn:0899-8418
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectAmazoniaes_ES
dc.subjectDroughtes_ES
dc.subjectENSOes_ES
dc.subjectNortheast Braziles_ES
dc.subjectPrecipitationes_ES
dc.subjectTNAes_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.titleThe role of ENSO flavours and TNA on recent droughts over Amazon forests and the Northeast Brazil regiones_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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