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dc.contributor.authorHannay, Cécile
dc.date.accessioned2016-06-22T23:12:42Z
dc.date.available2016-06-22T23:12:42Z
dc.date.issued2001-08
dc.identifier.urihttp://hdl.handle.net/11122/6664
dc.descriptionThesis (M.S.) University of Alaska Fairbanks 2001en_US
dc.description.abstractWe evaluate the ability of a typical cloud parameterization from a global model (CCM3 from NCAR) to simulate the Arctic cloudiness and longwave radiative fluxes during wintertime. Simulations are conducted with a Single-Column model (SCM) forced with observations and reanalysis data from the Surface Heat Budget of the Arctic Ocean (SHEBA) experiment. Typically, the SCM overestimates the Arctic cloud fraction and the downwelling longwave flux. Moreover, the SCM does not capture accurately the temperature and moisture profiles, and the surface flux fields. Relaxing temperature and moisture profiles to observed values dramatically improves the simulations. This suggests that the cloud parameterization of CCM3 is suitable for Arctic clouds, as long as the temperature and moisture fields are captured correctly. Sensitivities studies show that the cloud fraction is not very sensitive to cloud type, ice effective radius, ice liquid ratio amount and uncertainty of the advective forcing.en_US
dc.language.isoen_USen_US
dc.titleSingle-column model simulations of Arctic cloudiness and surface radiative fluxes during the surface heat budget of Arctic (SHEBA) experimenten_US
dc.typeThesisen_US
refterms.dateFOA2020-01-25T01:37:04Z


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