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dc.contributor.advisorArchibold, O. W. (Bill)en_US
dc.creatorGarnett, Edmund Rayen_US
dc.date.accessioned2008-11-14T13:41:19Zen_US
dc.date.accessioned2013-01-04T05:08:22Z
dc.date.available2009-11-14T08:00:00Zen_US
dc.date.available2013-01-04T05:08:22Z
dc.date.created2002-04en_US
dc.date.issued2002-04-14en_US
dc.date.submittedApril 2002en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-11142008-134119en_US
dc.description.abstractTeleconnections among the central, east equatorial Pacific, the Pacific/North American (PNA) pattern, and Southern Oscillation (SO) and monthly precipitation, monthly temperature, and spring wheat yields in Saskatchewan are examined. When sea surface temperatures in the central equatorial Pacific are warmer than the air temperatures (strong El Niño) there is an upward flux of water vapour into the atmosphere, convection, heat released by condensation, a strengthening of the westerlies and a vitalization of the Hadley circulation. When sea surface temperatures are colder than the air temperatures (strong La Niña) in the central equatorial Pacific it produces the opposite influence on atmospheric processes. Composite analysis reveals that El Niño and La Niña are the primary modulators of the Pacific/North American pattern and movement of surface cyclones across the western continent. Correlation and composite analyses indicate that between 1950 and 1998 warmer than normal sea surface temperatures in the central and east equatorial Pacific during the winter and early spring (El Niño) are associated with cooler and wetter conditions during the May through July period in Saskatchewan and higher wheat yields. Conversely cooler than normal sea surface temperatures in the central and east equatorial Pacific during the winter and early spring (La Niña) are associated with hotter and drier conditions during the May through July period in Saskatchewan and lower wheat yields. The relationship appears to be strongest for the Brown soil zone and weakest for the Black soil zone in Saskatchewan.en_US
dc.language.isoen_USen_US
dc.subjectAgricultureen_US
dc.titleLong-lead forecasting of precipitation and wheat yields in Saskatchewan using teleconnection indicesen_US
thesis.degree.departmentGeographyen_US
thesis.degree.disciplineGeographyen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberRipley, Earleen_US
dc.contributor.committeeMemberPaul, Alexen_US
dc.contributor.committeeMemberMaule, Charles P.en_US
dc.contributor.committeeMemberWheaton, Elaine E.en_US


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