OutgoingLongwaveRadiation(OLR)hasbeenshowntoplayanimportantroleinclimaticdiagnosisandlong-termpredictionandresearch.WiththeOLRdata1974~1997asobservedbysatellites,thecharacteristicsarecomputed.TheresultsareusedtodepictthelocationandintensityofthesubtropicalhighinthestudyoftherelationshipbetweentheannualfrequencyoftropicalcyclonesaffectingtheFujianprovinceandITCZ/subtropicalhigh.Itisshownthatinyearsoffewer(more)tropicalcyclones,theITCZissouthward(northward)locatedwithweaker(stronger)intensity,andthesubtropicalhighissouthward(northward).AsshownintherelationshipbetweentheanomalousyearsoftropicalcyclonesandcharacteristicsofprecedingOLRfields,theOLRanomaliesarejustoppositelydistributedinthePacificOceanforyearsofmore(fewer)tropicalcyclones.Inotherwords,theyearsoffewer(more)tropicalcyclonesareassociatedwithpositiveanomaliesofOLRinthetropicalwestPacificbutnegative(positive)anomaliesintheequatorialcentralandeasternPacific.Itishopedthatourstudybesettingfoundationforshort-termclimatologicalpredictionoftropicalcyclones.
