Combined effects of global warming and a shutdown of the Atlantic meridional overturning circulation on West African and European climate

dc.contributor.advisorCook, Kerry Harrison, 1953-en
dc.contributor.committeeMemberFu, Rongen
dc.contributor.committeeMemberDickinson, Robert E.en
dc.contributor.committeeMemberJackson, Charles S.en
dc.creatorBrown, Meredith Guenevere Longshoreen
dc.date.accessioned2012-07-20T16:31:44Zen
dc.date.available2012-07-20T16:31:44Zen
dc.date.issued2012-05en
dc.date.submittedMay 2012en
dc.date.updated2012-07-20T16:31:55Zen
dc.descriptiontexten
dc.description.abstractThe Atlantic meridional overturning circulation has a vast potential for abrupt climate change due to its large heat transport through the ocean and its nonlinear dynamics. Because of these unique properties, this paper investigates how the climate of West Africa and Europe will respond to a shutdown of the Atlantic meridional overturning circulation at the end of the 21st century. Here we use a regional climate model with 90-km grid spacing is forced by an idealized sea-surface temperature anomaly, based upon coupled atmosphere/ocean global model water hosing experiments, with a business-as-usual global warming scenario to discover how West African and European climate will change. In both the boreal spring and summer, cooling in the eastern Atlantic is associated with a strong intensification and eastward extension of the North Atlantic subtropical high over Europe throughout the depth of the atmosphere, a strengthening of the heat low over West Africa at low levels, and a weakening of the Saharan High in the upper atmosphere. Rainfall rates also decrease markedly throughout most of West Africa and Europe: in spring, rainfall rates decrease by 50-80% over Sahelian Africa, in summer rainfall over Europe decreases by up to 90%, while precipitation over West Africa is reduced by 40%.en
dc.description.departmentEarth and Planetary Sciencesen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2012-05-5421en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2012-05-5421en
dc.language.isoengen
dc.subjectGlobal warmingen
dc.subjectThermohalineen
dc.subjectWest Africaen
dc.subjectEuropeen
dc.subjectEnd of 21st centuryen
dc.titleCombined effects of global warming and a shutdown of the Atlantic meridional overturning circulation on West African and European climateen
dc.type.genrethesisen
thesis.degree.departmentGeological Sciencesen
thesis.degree.disciplineGeological Sciencesen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Geological Sciencesen

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