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dc.contributor.authorMoreno Chamarro, Eduardo
dc.contributor.authorMarshall, John C.
dc.contributor.authorDeworth, D. L.
dc.date.accessioned2020-04-16T14:56:14Z
dc.date.available2020-04-16T14:56:14Z
dc.date.issued2019-12
dc.date.submitted2019-04
dc.identifier.issn1520-0442
dc.identifier.issn0894-8755
dc.identifier.urihttps://hdl.handle.net/1721.1/124693
dc.description.abstractWe examine the link between migrations in the intertropical convergence zone (ITCZ) and changes in the Atlantic meridional overturning circulation (AMOC), Atlantic multidecadal variability (AMV), and Pacific decadal oscillation (PDO). We use a coupled climate model that allows us to integrate over climate noise and assess underlying mechanisms. We use an ensemble of ten 300-yr-long simulations forced by a 50-yr oscillatory North Atlantic Oscillation (NAO)-derived surface heat flux anomaly in the North Atlantic, and a 4000-yr-long preindustrial control simulation performed with GFDL CM2.1. In both setups, an AMV phase change induced by a change in the AMOC's cross-equatorial heat transport forces an atmospheric interhemispheric energy imbalance that is compensated by a change in the cross-equatorial atmospheric heat transport due to a meridional ITCZ shift. Such linkages occur on decadal time scales in the ensemble driven by the imposed forcing, and internally on multicentennial time scales in the control. Regional precipitation anomalies differ between the ensemble and the control for a zonally averaged ITCZ shift of similar magnitude, which suggests a dependence on time scale. Our study supports observational evidence of an AMV-ITCZ link in the twentieth century and further links it to the AMOC, whose long-time-scale variability can influence the phasing of ITCZ migrations. In contrast to the AMV, our calculations suggest that the PDO does not drive ITCZ migrations, because the PDO does not modulate the interhemispheric energy balance.en_US
dc.language.isoen
dc.publisherAmerican Meteorological Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1175/JCLI-D-19-0258.1en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Meteorological Societyen_US
dc.titleLinking ITCZ Migrations to the AMOC and North Atlantic/Pacific SST Decadal Variabilityen_US
dc.typeArticleen_US
dc.identifier.citationMoreno-Chamarro, E., et al. “Linking ITCZ Migrations to the AMOC and North Atlantic/Pacific SST Decadal Variability.” Journal of Climate 33, 3 (February 2020): 893–905. © 2019 American Meteorological Society.en_US
dc.relation.journalJournal of Climateen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-04-09T12:15:26Z
dspace.date.submission2020-04-09T12:15:30Z
mit.journal.volume33en_US
mit.journal.issue3en_US
mit.licensePUBLISHER_POLICY


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