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dc.contributor.advisorHarr, Patrick
dc.contributor.advisorMurphree, Tom
dc.contributor.authorRosencrans, Matthew J.
dc.date.accessioned2012-03-14T17:36:17Z
dc.date.available2012-03-14T17:36:17Z
dc.date.issued2006-06
dc.identifier.urihttp://hdl.handle.net/10945/2799
dc.description.abstractevel relative vorticity, a decrease in westerly vertical wind shear, and increased convection in the West African monsoon (WAM). The second and third modes of an empirical orthogonal function (EOF) analysis of the 700-hPa height anomalies identify a distinct Rossby-wave pattern. Significant variability in the Southern Hemisphere mid-latitude circulations is related to the two EOF modes and to equatorward Rossby-wave dispersion. Formation of a large cyclonic anomaly over the southeast Pacific, west of Chile, is related to equatorward propagation of a Rossby-like wave across South America, toward the equatorial Atlantic. The cyclonic anomaly precedes an increase in WAM convection by an average of two days, which then precedes westerly wind anomalies over the equatorial North Atlantic by several days. Tropical cyclone formation is found to be enhanced when the increased equatorial westerly anomalies coincide with reduced vertical wind shear, which is related to Northern Hemisphere midlatitude circulationsen_US
dc.description.urihttp://archive.org/details/variabilityinglo109452799
dc.format.extentxvi, 81 p. : maps ;en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsApproved for public release, distribution unlimiteden_US
dc.subject.lcshCyclonesen_US
dc.subject.lcshTropicsen_US
dc.subject.lcshOscillationsen_US
dc.titleVariability in global-scale circulations and their impacts on Atlantic tropical cyclone activityen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.description.serviceUS Air Force (USAF) author.en_US
dc.identifier.oclc70629741
etd.thesisdegree.nameM.S.en_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMeteorologyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.verifiednoen_US


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