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dc.contributor.authorHood, Lon L.
dc.contributor.authorRedman, Malori A.
dc.contributor.authorJohnson, Wes L.
dc.contributor.authorGalarneau, Thomas J.
dc.date.accessioned2020-01-24T19:11:13Z
dc.date.available2020-01-24T19:11:13Z
dc.date.issued2019-12-12
dc.identifier.citationHood, L. L., Redman, M. A., Johnson, W. L., & Galarneau Jr, T. J. (2020). Stratospheric Influences on the MJO-Induced Rossby Wave Train: Effects on Intraseasonal Climate. Journal of Climate, 33(1), 365-389.en_US
dc.identifier.issn0894-8755
dc.identifier.doi10.1175/jcli-d-18-0811.1
dc.identifier.urihttp://hdl.handle.net/10150/636703
dc.description.abstractThe tropical Madden–Julian oscillation (MJO) excites a northward propagating Rossby wave train that largely determines the extratropical surface weather consequences of the MJO. Previous work has demonstrated a significant influence of the tropospheric El Niño–Southern Oscillation (ENSO) on the characteristics of this wave train. Here, composite analyses of ERA-Interim sea level pressure (SLP) and surface air temperature (SAT) data during the extended northern winter season are performed to investigate the additional role of stratospheric forcings [the quasi-biennial oscillation (QBO) and the 11-yr solar cycle] in modifying the wave train and its consequences. MJO phase composites of 20–100-day filtered data for the two QBO phases show that, similar to the cool phase of ENSO, the easterly phase of the QBO (QBOE) produces a stronger wave train and associated modulation of SLP and SAT anomalies. In particular, during MJO phases 5–7, positive SLP and negative SAT anomalies in the North Atlantic/Eurasian sector are enhanced during QBOE relative to the westerly phase of the QBO (QBOW). The opposite occurs during the earliest MJO phases. SAT anomalies over eastern North America are also more strongly modulated during QBOE. Although less certain because of the short data record, there is some evidence that the minimum phase of the solar cycle (SMIN) produces a similar increased modulation of SLP and SAT anomalies. The strongest modulations of SLP and SAT anomalies are produced when two or more of the forcings are superposed (e.g., QBOE/cool ENSO, SMIN/QBOE, etc.).en_US
dc.description.sponsorshipClimate and Large-Scale Dynamics program of the National Science Foundation (NSF) - Directorate for Geosciences (GEO) [1643160]en_US
dc.language.isoenen_US
dc.publisherAMER METEOROLOGICAL SOCen_US
dc.rightsCopyright © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).en_US
dc.subjectENSOen_US
dc.subjectMadden-Julian oscillationen_US
dc.subjectQuasibiennial oscillationen_US
dc.subjectRossby wavesen_US
dc.subjectStabilityen_US
dc.subjectStratospheric circulationen_US
dc.titleStratospheric Influences on the MJO-Induced Rossby Wave Train: Effects on Intraseasonal Climateen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalJOURNAL OF CLIMATEen_US
dc.description.note6 month embargo; published online: 12 December 2019en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.volume33
dc.source.issue1
dc.source.beginpage365-389


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