简介：利用中国西部280站地面降水资料和NCEP再分析OLR资料,采用EOF、相关分析方法,分析了中国西部OLR与降水的关系。结果表明：（1）中国西部秋季OLR高值区与降水低值区相吻合,OLR低值区偏于降水高值区一侧。秋季OLR和降水具有显著的反相变化趋势。（2）西部秋季各月OLR与降水有大片显著的负相关区存在,在西北和东南象限OLR与降水的反位相变化关系更加密切,9月负相关显著区最大。（3）通过EOF分析,南疆盆地—青海高原西北部,是西部OLR变化最敏感的地方。分析敏感区OLR变化对秋季降水的影响,同期9月当吐鲁番OLR异常增大（减小）时,南疆西部、青海高原北部、甘南高原—陇中区域的降水偏多（少）,西藏—川西高原降水偏少（多）;10月内蒙西部OLR异常与新疆、陕北、川北、桂西有显著的反相变化;11月塔克拉玛干沙漠的OLR异常与陕西降水有显著的反相变化。异常敏感区OLR对秋季降水影响的前期月份主要是上年12月、当年4～6月和8月。（4）青藏高原OLR低值中心,从冬到夏向东向南移动。同期9月高原OLR低值升高,西藏高原降水增多、高原东北侧降水减少,10月高原OLR升高,高原降水增多、河西中部降水减少,11月两者无明显关系。对秋季降水影响的前期月份主要是当年1月、3月和6月。

简介：Anobjectivetechniqueoftropicalcyclone(TC)movingdirectionpredictionovertheNorthwesternPacificOceanduring2001-2002isstudiedusingGMS-5Outing-LongwaveRadiation(OLR)data.ThreeformulaeusedtopredictTCmovingdirectionin6,12and24h,respectively,havebeenobtainedbasedonamultiplelinearregressionframeworkandsomeregressionfactorsincludingseveralkindsofOLRcharacteristicvaluesandtheminimumsealevelpressureoftropicalcyclonecenter.ThemultiplecorrelationcoefficientsofthestatisticalanalysisusingtheinformationofTCsintheYearbookonTropicalCyclonestovalidatethesatellite-basedpredictionare0.954,0.945and0.914respectively.TheresultsaresatisfyingthroughcheckingoneoftheTCsin2001.ThetechniquescouldbeappliedinfutureoperationandwouldcontributetoTCmovementprediction,especiallytoasuddenchangeinTCmovingdirectionandimprovingtheforecastingandwiningcapability.

简介：本文介绍了利用NOAA—AVHRRIB数据集计算青海高原的地气系统射出长波辐射(OLR)的方法及其结果,并对计算结果进行了分析。分析表明青海的西北部地区和东南部地区分别为OLR高值区和低值区。

简介：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.