The purpose of this study is to define areas having a high correlation with the
annual variability of the Tropical Cyclone(TC) activities in the Western North
Pacific(WNP), the Eastern North Pacific(ENP) and the North Atlantic(NA). Also,
oceanic and atmospheric factors, which are highly related with TC activities for each
ocean basin, were selected and then possibility of predicting annual TC activities was
examined using the selected factors over defined areas. In order to analyze TC
activities, the Accumulated Cyclone Energy(ACE) was used as the index in
consideration of duration, intensity and frequency of TC. The factors having an
influence on ACE consist of the Sea Surface Temperature(SST), the Mean Sea Level
Pressure(MSLP) and the Vertical Wind Shear(VWS). Overall, correlations between
the ocean/atmospheric factors within the Prime Genesis Regions(PGR) and the Main
Passage Region(MPR) where ACE/TC frequently pass by was insignificant. Based on
existing studies suggesting that the El Nino-Southern Oscillation(ENSO) has
influence on establishment and development of tropical cyclones, the El Nino-La Nina
Main Passage Region(E-L MPR) was additionally analyzed in order to sort and
compare the factors showing high correlations per each sea area. Concerning E-L
MPR in WNP, it is neither SST nor VWS in MPR that has an influence on the
magnitude of ACE. It is rather the outbreak location of TC that counts as an
influence. In ENP, the reason that oceanic and atmospheric factors of MPR show a
high correlations with ACE is different by ocean basin. from other sea areas, the
chance of TC reaching land is small due to the influence of trade wind. Therefore,
the influence of ENSO on the establishment of TC is small as well. As for NA, SST
in PGR, 500hPa RH and VWS show high correlation with ACE. The Multiple
Regression Equation(MRE) was used to sort ocean/atmospheric factors having a high
correlation per each sea area. In WNP, the factors of E-L MPR showed
0.74(correlation) with ACE. In ENP, the factors of MPR showed 0.76(correlation). In
NA, the factors of PGR showed 0.61(correlation). Such results are considered to make
significant contributions to the prediction of ACE.