摘要
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.
出版日期
2018年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
