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dc.contributor.advisorSusan Solomon.en_US
dc.contributor.authorBenjamin, Jordan T.en_US
dc.contributor.otherMassachusetts Institute of Technology. Department of Physics.en_US
dc.date.accessioned2019-09-17T19:49:15Z
dc.date.available2019-09-17T19:49:15Z
dc.date.copyright2019en_US
dc.date.issued2019en_US
dc.identifier.urihttps://hdl.handle.net/1721.1/122235
dc.descriptionThesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2019en_US
dc.descriptionCataloged from PDF version of thesis.en_US
dc.descriptionIncludes bibliographical references (pages 28-29).en_US
dc.description.abstractRecent work by Santer et al. (2018) in Science examined the usefulness of the latitudinal structure and seasonal behavior of warming for fingerprinting anthropogenic climate change using satellite data and the CMIP5 multi-model ensemble over 1979-2016. They identify the first seasonal fingerprint in the northern hemisphere annual cycle and structure of warming, but do not specify what forcing agent (e.g. ozone, soot, or greenhouse gases) is responsible for causing it. We further probe this phenomena using 3 ensembles-of-opportunity over 1955-1979 and 1995-2024 of the Whole Atmosphere Community Climate Model version 4 (WACCM4), one of the world's few best fully coupled interactive chemistry-climate models. While our ensembles' construction covers limited time periods, it has the advantage of avoiding the effects of El Chichón (1982) and Pinatubo (1991), which are difficult to capture in models and have different drivers (volcanic) than the ones of interest here. The key findings of this research are that added greenhouse gas forcings nearly fully determine the latitudinal structure of warming and change in the amplitude of the annual cycle, that WACCM4 does a much better job than the CMIP5 multi-model ensemble of predicting the magnitude and latitudinal structure of climate change, and that tropical expansion and a poleward shift of the jet may drive the key subtropical features Santer observed. Interactive chemistry is not found to be a defining factor in representing the rate and structure of warming in CMIP5, and is certainly much less important than other details of model construction.en_US
dc.description.statementofresponsibilityby Jordan T. Benjamin.en_US
dc.format.extent43 pagesen_US
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsMIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582en_US
dc.subjectPhysics.en_US
dc.titleAnalyzing recent latitudinal and seasonal changes in simulated atmospheric temperatures from a global chemistry-climate modelen_US
dc.typeThesisen_US
dc.description.degreeS.B.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.identifier.oclc1119388945en_US
dc.description.collectionS.B. Massachusetts Institute of Technology, Department of Physicsen_US
dspace.imported2019-09-17T19:49:13Zen_US
mit.thesis.degreeBacheloren_US
mit.thesis.departmentPhysen_US


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