How Does Coupled Tropospheric Chemistry Affect Climate? An Investigation Using the Community Earth System Model Version 2

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dc.contributor.advisorTandon, Neil
dc.contributor.authorStanton, Noah Alexander
dc.date.accessioned2022-12-14T16:36:53Z
dc.date.available2022-12-14T16:36:53Z
dc.date.copyright2022-07-28
dc.date.issued2022-12-14
dc.date.updated2022-12-14T16:36:53Z
dc.degree.disciplineEarth & Space Science
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractThe depiction of tropospheric chemistry in climate models has greatly improved in recent years. The Community Earth System Model version 2 with Whole Atmosphere Community Climate Model version 6 (CESM2-WACCM6) has implemented fully-coupled tropospheric chemistry with 231 chemical species, an updated aerosol scheme, as well as a fully-coupled ocean. To examine the impacts of these improvements, 100-year preindustrial control simulations were run using the following two configurations 1) a “simplified” CESM2-WACCM6 configuration in which coupled chemistry is confined to the middle atmosphere, and 2) the standard CESM2-WACCM6 configuration with fully-coupled chemistry over all atmospheric levels. Regional differences in surface temperature and the CRE range between -5 K and 5 K and -10 W m-2 to 10 W m-2, respectively. Dynamical changes include an equatorward shift of the mid-latitude jets and weakening of the Southern Hemisphere stratospheric polar vortex. The equatorward shifts of the jets are due to widespread tropospheric cooling.
dc.identifier.urihttp://hdl.handle.net/10315/40730
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectAtmospheric sciences
dc.subjectAtmospheric chemistry
dc.subjectClimate change
dc.subject.keywordsAtmospheric sciences
dc.subject.keywordsAtmospheric chemistry
dc.subject.keywordsClimate modelling
dc.subject.keywordsAerosol chemistry
dc.subject.keywordsHigh performance computing
dc.subject.keywordsClimate change
dc.subject.keywordsPre-industrial climate
dc.subject.keywordsSecondary organic aerosols
dc.subject.keywordsBlack carbon
dc.subject.keywordsPrimary organic matter
dc.subject.keywordsStratospheric chemistry
dc.subject.keywordsTropospheric chemistry
dc.subject.keywordsOzone chemistry
dc.subject.keywordsOrganic nitrates
dc.subject.keywordsEarth System Model
dc.subject.keywordsCommunity Earth System Model
dc.subject.keywordsWhole Atmosphere Community Climate Model
dc.subject.keywordsWACCM6
dc.subject.keywordsCESM2
dc.subject.keywordsWACCM
dc.subject.keywordsCESM
dc.subject.keywordsAerosol effects
dc.titleHow Does Coupled Tropospheric Chemistry Affect Climate? An Investigation Using the Community Earth System Model Version 2
dc.typeElectronic Thesis or Dissertation

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