摘要
ThesynopticsituationandmesoscalestructureofanexplosiveextratropicalcycloneovertheNorthwesternPacificinMarch2007areinvestigatedthroughweatherstationobservationsanddatareanalysis.Thecycloneislocatedbeneaththepolewardsideoftheexitofa200hPajet,whichisastrongdivergentregionaloft.Atmid-level,thecycloneliesonthedownstreamsideofawell-developedtrough,whereastrongascendingmotionfrequentlyoccurs.Cross-sectionanalyseswithweatherstationdatashowthatthecyclonehasawarmandmoistcore.A'nose'ofthecoldfront,whichischaracterizedbyalow-levelprotrudingstructureintheequivalentpotentialtemperaturefield,formswhenthecyclonemovesoffshore.This'nose'structureishypothesizedtohavebeencausedbytheheatingeffectoftheKuroshioCurrent.Twolow-leveljetstreamsarealsoidentifiedonthewesternandeasternsidesofthecoldfront.Thewesternjetconveyscoldanddryairat800-900hPa.Thewindinthenorthernpartisnortheasterly,andthewindinthesouthernpartisnorthwesterly.Bycontrast,theeasternjetcarrieswarmandmoistairintothecyclonesystem,ascendingnorthwardfrom900hPato600-700hPa.Thesouthernpartisdominatedbythesoutherlywind,andthewindinthenorthernpartissouthwesterly.Theeasternandwesternjetssignificantlyincreasetheairtemperatureandmoisturecontrastinthevicinityofthecoldfront.Thisincreasecouldplayanimportantroleinimprovingtherapidcyclogenesisprocess.
出版日期
2017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）
