Tandon, NeilStanton, Noah Alexander2022-12-142022-12-142022-07-282022-12-14http://hdl.handle.net/10315/40730The 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.Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.Atmospheric sciencesAtmospheric chemistryClimate changeElectronic Thesis or Dissertation2022-12-14Atmospheric sciencesAtmospheric chemistryClimate modellingAerosol chemistryHigh performance computingClimate changePre-industrial climateSecondary organic aerosolsBlack carbonPrimary organic matterStratospheric chemistryTropospheric chemistryOzone chemistryOrganic nitratesEarth System ModelCommunity Earth System ModelWhole Atmosphere Community Climate ModelWACCM6CESM2WACCMCESMAerosol effects