Theeffectsofverticalwindshearontropicalcyclone(TC)intensitychangeareexaminedbasedontheTCdatafromtheChinaMeteorologicalAdministrationandtheNCEPreanalysisdailydatafrom2001to2006.First,theinfluenceofwindshearbetweendifferentverticallevelsandaveragesindifferenthorizontalareasarecompared.Theresultsindicatethattheeffectofwindshearbetween200and850hPaaveragedwithina200-800kmannulusonTCintensitychangeislargerthananyothercalculatedverticalwindshear.High-latitudeandintenseTCstendtobelesssensitivetotheeffectsofVWSthanlow-latitudeandweakTCs.TCsexperiencetimelagsbetweentheimpositionoftheshearandtheweakeninginTCintensity.Averticalshearof8-9m/s(9-10m/s)wouldweakenTCintensitywithin60h(48h).Averticalsheargreaterthan10m/swouldweakenTCintensitywithin6h.Finally,astatisticalTCintensitypredictionschemeisdevelopedbyusingpartialleastsquaresregression,whichproducesskillfulintensityforecastswhenpotentialpredictorsincludefactorsrelatedtotheverticalwindshear.Analysisofthestandardizedregressioncoefficientsfurtherconfirmstheobtainedstatisticalresults.
