We acknowledge helpful comments by Drs. P. L. Vidale, M. Roberts, J. Strachan, R. E. Hart, Y. Ogura, H. Tsuguchi, and M. Zahn. The atmosphere and ocean datasets made use of JRA-25/JCDAS, ERA-Interim, and NOAA OISST. The best-track data were obtained from the IBTrACS website. Potential intensity was calculated using the FORTRAN program from the website of Dr. K. Emanuel. This research was supported by JSPS KAKENHI Grants 23740349, 24244074, and 25106703 and by the Overseas Internship Program for Outstanding Young Earth and Planetary Researchers.
Bister, M., , and K. A. Emanuel, 2002: Low frequency variability of tropical cyclone potential intensity 1. Interannual to interdecadal variability. J. Geophys. Res., 107, 4801, doi:10.1029/2001JD000776.
Camargo, S. J., , K. A. Emanuel, , and A. H. Sobel, 2007: Use of a genesis potential index to diagnose ENSO effects on tropical cyclone genesis. J. Climate, 20, 4819–4834.
Camargo, S. J., , M. C. Wheeler, , and A. H. Sobel, 2009: Diagnosis of the MJO modulation of tropical cyclogenesis using an empirical index. J. Atmos. Sci., 66, 3061–3074.
Davis, C. A., , and L. F. Bosart, 2004: The TT problem: Forecasting the tropical transition of cyclones. Bull. Amer. Meteor. Soc., 85, 1657–1662.
Dveson, A. C., , K. A. Browning, , and T. D. Hewson, 2002: A classification of FASTEX cyclones using a height-attributable quasi-geostrophic vertical-motion diagnostic. Quart. J. Roy. Meteor. Soc., 128, 93–117.
Emanuel, K. A., 1986: An air–sea interaction theory for tropical cyclones. Part I: Steady-state maintenance. J. Atmos. Sci., 43, 585–604.
Emanuel, K. A., , and D. S. Nolan, 2004: Tropical cyclone activity and global climate. Proc. 26th Conf. on Hurricanes and Tropical Meteorology, Miami, FL, Amer. Meteor. Soc., 240–241.
Evans, J. L., , and M. P. Guishard, 2009: Atlantic subtropical storms. Part I: Diagnostic criteria and composite analysis. Mon. Wea. Rev., 137, 2065–2080.
Fita, L., , R. Romero, , A. Luque, , K. Emanuel, , and C. Ramis, 2007: Analysis of the environments of seven Mediterranean tropical-like storms using an axisymmetric, nonhydrostatic, cloud resolving model. Nat. Hazards Earth Syst. Sci., 7, 41–56.
Gray, W. M., 1975: Tropical cyclone genesis. Colorado State University Department of Atmospheric Sciences Paper 234, 121 pp.
Hart, R. E., , and J. L. Evans, 2001: A climatology of the extratropical transition of Atlantic tropical cyclones. J. Climate, 14, 546–564.
Hart, R. E., , J. L. Evans, , and C. Evans, 2006: Synoptic composites of the extratropical transition life cycle of North Atlantic tropical cyclones: Factors determining posttransition evolution. Mon. Wea. Rev., 134, 553–578.
Hodges, K. I., 1994: A general method for tracking analysis and its application to meteorological data. Mon. Wea. Rev., 122, 2573–2586.
Hodges, K. I., , R. W. Lee, , and L. Bengtsson, 2011: A comparison of extratropical cyclones in recent reanalyses ERA-Interim, NASA MERRA, NCEP CFSR, and JRA-25. J. Climate, 24, 4888–4906.
Hoskins, B. J., , and K. I. Hodges, 2002: New perspectives on the Northern Hemisphere winter storm tracks. J. Atmos. Sci., 59, 1041–1061.
Inatsu, M., , H. Mukougawa, , and S. Xie, 2002: Tropical and extratropical SST effects on the midlatitude storm track. J. Meteor. Soc. Japan, 80, 1069–1076.
Jones, S. C., and Coauthors, 2003: The extratropical transition of tropical cyclones: Forecast challenges, current understanding, and future directions. Wea. Forecasting, 18, 1052–1092.
Jung, T., and Coauthors, 2012: High-resolution global climate simulations with the ECMWF model in project Athena: Experimental design, model climate, and seasonal forecast skill. J. Climate, 25, 3155–3172.
Kitabatake, N., 2008: Extratropical transition of tropical cyclones in the western North Pacific: Their frontal formation. Mon. Wea. Rev., 136, 2066–2090.
Kitabatake, N., 2010: Impact of synthetic wind retrieval on tropical cyclone structures at the extratropical transition stage in the JRA-25 reanalysis. SOLA, 6, 77–80.
Kitabatake, N., 2011: Climatology of extratropical transition of tropical cyclones in the western North Pacific. J. Meteor. Soc. Japan, 89, 309–325.
Knapp, K. R., , M. C. Kruk, , D. H. Levinson, , H. J. Diamond, , and C. J. Neumann, 2010: The International Best Track Archive for Climate Stewardship (IBTrACS) unifying tropical cyclone data. Bull. Amer. Meteor. Soc., 91, 363–376.
Kurihara, Y., , M. A. Bender, , and R. J. Ross, 1993: An initialization scheme of hurricane models by vortex specification. Mon. Wea. Rev., 121, 2030–2045.
Mctaggart-Cowan, R., , J. T. J. Galarnequ, , L. F. Bosart, , R. W. Moore, , and O. Martius, 2013: A global climatology of baroclinically influenced tropical cyclogenesis. Mon. Wea. Rev., 141, 1963–1989.
Miyasaka, T., , and H. Nakamura, 2005: Structure and formation mechanism of the Northern Hemisphere summertime subtropical highs. J. Climate, 18, 5046–5065.
Murakami, H., , and B. Wang, 2010: Future change of North Atlantic tropical cyclone tracks: Projection by a 20-km-mesh global atmospheric model. J. Climate, 23, 2699–2721.
Ogura, Y., , H. Niino, , R. Kumabe, , and S. Nisimura, 2005: Evolution of a typhoon-like subtropical low causing severe weather over the Kanto area on 13 October 2003. J. Meteor. Soc. Japan, 83, 531–550.
Rasmussen, E. A., , and J. Turner, Eds., 2003: Polar Lows: Mesoscale Weather Systems in the Polar Regions.Cambridge University Press, 624 pp.
Reynolds, R. W., , N. A. Rayner, , T. M. Smith, , D. C. Stokes, , and W. Wang, 2002: An improved in situ and satellite SST analysis for climate. J. Climate, 15, 1609–1625.
Rotunno, R., , and K. A. Emanuel, 1987: An air–sea interaction theory for tropical cyclones. Part II: Evolutionary study using a nonhydrostatic axisymmetric numerical model. J. Atmos. Sci., 44, 542–561.
Sauliere, J., , D. J. Brayshaw, , B. Hoskins, , and M. Blackburn, 2012: Further investigation of the impact of idealized continents and SST distributions on the Northern Hemisphere storm tracks. J. Atmos. Sci., 69, 840–856.
Schenkel, B. A., , and R. E. Hart, 2012: An examination of tropical cyclone position, intensity, and intensity life cycle within atmospheric reanalysis datasets. J. Climate, 25, 3453–3475.
Simmons, A., , S. Uppala, , D. Dee, , and S. Kobayashi, 2007: ERA-Interim: New ECMWF reanalysis products from 1989 onwards. ECMWF Newsletter, No. 110, ECMWF, Reading, United Kingdom, 25–35.
Strachan, J., , P. L. Vidale, , K. Hodges, , M. Roberts, , and M.-E. Demory, 2013: Investigating global tropical cyclone activity with a hierarchy of AGCMs; the role of resolution. J. Climate, 26, 133–152.
Valdes, P. J., , and B. J. Hoskins, 1989: Linear stationary wave simulations of the time-mean climatological flow. J. Atmos. Sci., 46, 2509–2527.
Wang, H., , and M. Ting, 1999: Seasonal cycle of the climatological stationary waves in the NCEP–NCAR reanalysis. J. Atmos. Sci., 56, 3892–3919.
Yanase, W., , and H. Niino, 2005: Effects of baroclinicity on the cloud pattern and structure of polar lows: A high-resolution numerical experiment. Geophys. Res. Lett., 32, L02806, doi:10.1029/2004GL020469.
Yanase, W., , and H. Niino, 2007: Dependence of polar low development on baroclinicity and physical processes: An idealized high-resolution numerical experiment. J. Atmos. Sci., 64, 3044–3067.
Yanase, W., , and A. Abe-Ouchi, 2010: A numerical study on the atmospheric circulation over the midlatitude North Pacific during the last glacial maximum. J. Climate, 23, 135–151.
Yanase, W., , M. Satoh, , H. Yamada, , K. Yasunaga, , and Q. Moteki, 2010: Continual influences of tropical waves on the genesis and rapid intensification of Typhoon Durian (2006). Geophys. Res. Lett., 37, L08809, doi:10.1029/2010GL042516.
Yanase, W., , M. Satoh, , H. Taniguchi, , and H. Fujinami, 2012: Seasonal and intraseasonal modulation of tropical cyclogenesis environment over the Bay of Bengal during the extended summer monsoon. J. Climate, 25, 2914–2930.