SignificantchangeshaveoccurredintheAntarcticPeninsula(AP)includingwarmertemperatures,acceleratedmeltingofglaciers,andbreakupoficeshelves.ThisstudyusestheWeatherResearchandForecastingmodel(WRF)forcedbytheCommunityClimateSystemModel4(CCSM)simulationstostudyfoehnwindwarminginAP.Wea-thersystemsresponsibleforgeneratingthefoehneventsaretwocyclonicsystemsthatmovetowardand/orcrossoverAP.WRFsimulatesthemovementofcyclonicsystemsandtheresultingfoehnwindwarmingthatisabsentinCCSM.ItisfoundthatthewarmingextentalongatransectacrossthecentralAPtowardLarsenCIceShelf(LCIS)variesduringthesimulationperiodandthemaximumwarmingmovesfromnearthebaseofleewardslopestoover40kmawayextendingtowardtheattachedLCIS.Ouranalysissuggeststhatthefoehnwindwarmingisnegativelycorrelatedwiththeincomingairtemperatureandthemountaintoptemperatureduringperiodswithoutsignificantprecipitation,inwhichisentropicdrawdownisthedominantheatingmechanism.Ontheotherhand,whensignificantprecipitationoccursalongthewindwardsideofAP,latentheatingisthemajorheatingmechanismevidencedbypositiverelationsbetweenthefoehnwindwarmingand1)incomingairtemperature,2)windwardprecipitation,and3)latentheating.Foehnwindwarmingcausedbyisentropicdrawdownalsotendstobestrongerthanthatcausedbylatentheating.ComparisonofWRFsimulationsforcedbyoriginalandcorrectedCCSMdataindicatesthatfoehnwindwarmingisstrongerintheoriginalCCSMforcedsimulationwhennosignificantwindwardprecipitationispresent.Thefoehnwindwarmingbecomesweakerinbothsimulationswhenthereissignificantwindwardprecipitation.Thissuggeststhatmodel’sabilitytoresolvethefoehnwarmingvarieswiththeforcingdata,buttheprecipitationimpactontheleewardwarmingisconsistent.
