Interannual variations in low potential vorticity water and the subtropical countercurrent in an eddy-resolving OGCM

Aoki Y, Suga T, Hanawa K (2002) Subsurface subtropical fronts of the North Pacific as inherent boundaries in the ventilated thermocline. J Phys Oceanogr 32:2299–2311 Argo Science Team (2001) Argo: the global array of profiling floats. In: Koblinsky CJ, Smith NR (eds) Observing the oceans in the 21st century. GODAE Project Office, Bureau of Meteorology, Melbourne, pp 248–258 Boyer TP, Stephens C, Antonov JI, Conkright ME, Locarnini RA, O’Brien TD, Garcia HE (2002) World ocean atlas 2001. Salinity, vol 1. In: Levitus S (ed) NOAA atlas NESDIS 50. US Government Printing Office, Washington, DC, p 176 Hanawa K, Talley L (2001) Mode waters, in ocean circulation and climate. In: Siedler G, Church J, Gould J (eds) Int Geophys Ser. Elsevier, New York, pp 373–386 Hosoda S, Ohira T, Sato K, Suga T (2010) Improved description of global mixed-layer depth using Argo profiling floats. J Oceanogr 66:773–787 Inui T, Takeuchi K, Hanawa K (1999) A numerical investigation of the subduction process in response to an abrupt intensification of the westerlies. J Phys Oceanogr 29:1993–2015 Kalnay E et al (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteorol Soc 77:437–471 Kobashi F, Kawamura H (2001) Variation of sea surface height at periods of 65–220 days in the subtropical gyre of the North Pacific. J Geophys Res 106:26817–26831 Kobashi F, Kawamura H (2002) Seasonal variation and instability nature of the North Pacific Subtropical Countercurrent and the Hawaiian Lee Countercurrent. J Geophys Res 107:3185. doi:10.1029/2001JC001225 Kobashi F, Xie SP (2011) Interannual variability of the North Pacific Subtropical Countercurrent: role of local ocean-atmosphere interaction. J Oceanogr (submitted) Kobashi F, Mitsudera H, Xie SP (2006) Three subtropical fronts in the North Pacific: observational evidence for mode water-induced subsurface frontogenesis. J Geophys Res 111:C09033. doi:10.1029/2006JC003479 Kobashi F, Xie SP, Iwasaka N, Sakamoto T (2008) Deep atmospheric response to the North Pacific oceanic subtropical front in spring. J Clim 21:5960–5975 Kubokawa A (1999) Ventilated thermocline strongly affected by a deep mixed layer: a theory for subtropical countercurrent. J Phys Oceanogr 29:1314–1333 Kubokawa A, Inui T (1999) Subtropical countercurrent in an idealized ocean GCM. J Phys Oceanogr 29:1303–1313 Large WG, McWilliams JC, Doney SC (1994) Oceanic vertical mixing: a review and a model with a nonlocal boundary layer parameterization. Rev Geophys 32:363–403 Masumoto Y, Sasaki H, Kagimoto T, Komori N, Ishida A, Sasai Y, Miyama T, Motoi T, Mitsudera H, Takahashi K, Sakuma H, Yamagata T (2004) A fifty-year eddy-resolving simulation of the world ocean—preliminary outcomes of OFES (OGCM for the Earth Simulator). J Earth Simulator 1:31–52 Masuzawa J (1969) Subtropical mode water. Deep Sea Res 16:436–472 Melnichenko OV, Maximenko NA, Schneider N, Sasaki H (2010) Quasi-stationary striations in basin-scale oceanic circulation: vorticity balance from observations and eddy-resolving model. Ocean Dyn 60:653–666 Nakamura H (1996) A pycnostad on the bottom of the ventilated portion in the central subtropical North Pacific: its distribution and formation. J Oceanogr 52:171–188 Nonaka M, Nakamura H, Tanimoto T, Kagimoto T, Sasaki H (2006) Decadal variability in the Kuroshio–Oyashio Extension simulated in an eddy-resolving OGCM. J Clim 19:1970–1989 Nonaka M, Nakamura H, Tanimoto Y, Kagimoto T, Sasaki H (2008) Interannual-to-decadal variability in the Oyashio Current and its influence on temperature in the subarctic frontal zone: an eddy-resolving OGCM simulation. J Clim 21:6283–6303 Oka E (2009) Seasonal and interannual variation of North Pacific Subtropical Mode Water in 2003–2006. J Oceanogr 65:151–164 Oka E, Suga T (2005) Differential formation and circulation of North Pacific central mode water. J Phys Oceanogr 35:1997–2011 Pacanowski RC, Griffies SM (2000) MOM 3.0 manual. Geophysical Fluid Dynamics Laboratory/National Oceanic and Atmospheric Administration, Princeton Qiu B (1999) Seasonal eddy field modulation of the North Pacific subtropical countercurrent: TOPEX/Poseidon observations and theory. J Phys Oceanogr 29:2471–2486 Qiu B, Chen S (2010) Interannual variability of the North Pacific subtropical countercurrent and its associated mesoscale eddy field. J Phys Oceanogr 40:213–225 Qiu B, Koh DA, Lumpkin C, Flament P (1997) Existence and formation mechanism of the North Hawaiian Ridge Current. J Phys Oceanogr 27:431–444 Richards KJ, Maximenko NA, Bryan FO, Sasaki H (2006) Zonal jets in the Pacific Ocean. Geophys Res Lett 33:L03605. doi:10.1029/2005GL024645 Roden GI (1975) On the North Pacific temperature, salinity, sound velocity fronts, and the relation to the wind and energy flux fields. J Phys Oceanogr 5:557–571 Sasaki H, Nonaka M, Masumoto Y, Sasai Y, Uehara H, Sakuma H (2008) An eddy-resolving hindcast simulation of the quasi-global ocean from 1950 to 2003 on the Earth Simulator. In: Hamilton K, Ohfuchi W (eds) High resolution numerical modelling of the atmosphere and ocean. Springer, New York, pp 157–185 Sasaki H, Xie SP, Taguchi B, Nonaka M, Hosoda S, Masumoto Y (2011) Interannual variations of the Hawaiian Lee Countercurrent induced by low potential vorticity water ventilation in the subsurface. J Oceanogr (submitted) Smith RD, Maltrud ME, Bryan FO, Hecht MW (2000) Numerical simulation of the North Atlantic Ocean at 1/10°. J Phys Oceanogr 30:1532–1561 Stephens C, Antonov JI, Boyer TP, Conkright ME, Locarnini RA, O’Brien TD, Garcia HE (2002) World ocean atlas 2001. Temperature, vol. 1. In: Levitus S (ed) NOAA atlas NESDIS 49. US Government Printing Office, Washington, DC, p 167 Suga T, Takei Y, Hanawa K (1997) Thermostad distribution in the North Pacific subtropical gyre: the central mode water and the subtropical mode water. J Phys Oceanogr 27:140–152 Suga T, Motoki K, Aoki Y, Macdonald AM (2004) The North Pacific climatology of winter mixed layer and mode waters. J Phys Oceanogr 34:3–22 Taguchi B, Xie SP, Schneider N, Nonaka M, Sasaki H, Sasai Y (2007) Decadal variability of the Kuroshio Extension: observations and an eddy-resolving model hindcast. J Clim 20:2357–2377 Taguchi B, Qiu B, Nonaka M, Sasaki H, Xie SP, Schneider N (2010) Decadal variability in the Kuroshio Extension: mesoscale eddies and recirculations. Ocean Dyn 60:673–691. doi:10.1007/s10236-010-0295-1 Takeuchi K (1984) Numerical study of the subtropical front and the subtropical countercurrent. J Oceanogr Soc Jpn 40:371–381 Uda M, Hasunuma K (1969) The eastward subtropical countercurrent in the western North Pacific Ocean. J Oceanogr Soc Jpn 25:201–210 White WB, Hasunuma K, Solomon H (1978) Large scale seasonal and secular variability of the Subtropical Front in the Western North Pacific from 1954 to 1974. J Geophys Res 83:4531–4544 Xie SP, Kunitani T, Kubokawa A, Nonaka M, Hosoda S (2000) Interdecadal thermocline variability in the North Pacific for 1958–97: a GCM simulation. J Phys Oceanogr 30:2798–2813 Xie SP, Liu T, Liu Q, Nonaka M (2001) Far-reaching effects of the Hawaiian Islands on the Pacific Ocean-atmosphere. Science 292:2057–2060 Xie SP, Deser C, Vecchi GA, Ma J, Teng H, Wittenberg AT (2010) Global warming pattern formation: sea surface temperature and rainfall. J Clim 23:966–986 Xie SP, Xu L, Liu Q, Kobashi F (2011) Dynamical role of mode water ventilation in decadal variability in the central subtropical gyre of the North Pacific. J Clim 24:1212–1225 Yamanaka G, Ishizaki H, Hirabara M, Ishikawa I (2008) Decadal variability of the subtropical front of the western North Pacific in an eddy-resolving ocean general circulation model. J Geophys Res 113:C12027. doi:10.1029/2008JC005002 Yoshida K, Kidokoro T (1967) A subtropical countercurrent in the North Pacific—an eastward flow near the subtropical convergence. J Oceanogr Soc Jpn 23:88–91