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Journal of Oceanography

, Volume 71, Issue 5, pp 557–573 | Cite as

Early summertime interannual variability in surface and subsurface temperature in the North Pacific

  • Shigeki Hosoda
  • Masami Nonaka
  • Yoshikazu Sasai
  • Hideharu Sasaki
Special Section: Original Article “Hot Spots” in the Climate System: New Developments in the Extratropical Ocean-Atmosphere Interaction Research

Abstract

Vertical structures of early summer ocean temperature variability on interannual and longer time scales in the North Pacific (NP) are investigated based on observational data obtained by the Argo. In the central and especially eastern NP regions, temperature variance is large but limited to the shallower layer. Given shallow mixed layer isolated by strong stratification from the subsurface layer due to strong short wave radiation in summer, the limitation to the shallower layer is expected. On the contrary, temperature variability in the western NP region frequently extends several hundred meters in depth. In the western NP, longer time scale variability of temperature is also apparent as temperature difference before and after 2008. Solutions of an eddy-resolving ocean general circulation model strongly suggest that the temperature variability is associated with changes in the oceanic frontal structures that extend to subsurface layer: enhancement of the northern branch of Kuroshio Extension and associated weakened meridional temperature gradients to the south and north of the current after 2008. The deep structure of temperature variability apparently indicates that it is caused not by atmospheric thermal forcing, but by oceanic structure changes, and it is corroborated by the similar variability in the subsurface salinity field. Also, it is shown that atmospheric thermal forcing strongly affects early summer sea surface temperature variability in the eastern NP, but not in the western NP.

Keywords

Summertime temperature variability North Pacific Argo OFES Air–sea interaction Interannual variability 

Notes

Acknowledgments

This study is supported in part by the Japan Society of Promotion of Science (JSPS) through Grants-in-Aid for Scientific Research in Innovative Areas 2205. The Earth Simulator was utilized in support of JAMSTEC. Members of the Argo Data Management Team of the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) helped with the use of Argo float data and refinement of the data set. Also, the authors thank two reviewers for their constructive comments that helped improve this study. Argo float data were obtained from the GDAC web sites at http://www.coriolis.eu.org/ and http://www.usgodae.org/argo/argo.html.

References

  1. Alexander MA, Deser C (1995) A mechanism for the recurrence of wintertime midlatitude SST anomalies. J Phys Oceanogr 25:122–137CrossRefGoogle Scholar
  2. Argo Data Management Team (2002) Report of the Argo data management meeting. In: Proceedings of the Argo data management third meeting, marine environmental data, Ottawa, ON, Canada, p 42Google Scholar
  3. 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 248–258Google Scholar
  4. Ashok K, Yamagata T (2009) The El Nino with a difference. Nature 461:481–484CrossRefGoogle Scholar
  5. Chelton DB, Schlax MG, Freilich MH, Millif RF (2004) Satellite measurements reveal persistent small-scale features in ocean winds. Science 303:978–983CrossRefGoogle Scholar
  6. Ducet N, Le Traon P-Y, Reverdin G (2000) Global high resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2. J Geophys Res 105:19477–19498CrossRefGoogle Scholar
  7. Frankignoul C, Sennechael N, Kwon Y-O, Alexander MA (2011) Influence of the meridional shifts of the Kuroshio and the Oyashio Extensions on the atmospheric circulation. J Clim 24:762–777. doi: 10.1175/2010JCLI3731.1 CrossRefGoogle Scholar
  8. Hasegawa T, Ando K, Ueki I, Mizuno K, Hosoda S (2014) Upper-ocean salinity variability in the tropical pacific: case study for quasi-decadal shift during the 2000s using TRITON buoys and Argo floats. J Clim 26:8126–8138. doi: 10.1175/JCLI-D-12-00187.1 CrossRefGoogle Scholar
  9. Hosoda S, Ohira T, Nakamura T (2008) A monthly mean dataset of global oceanic temperature and salinity derived from Argo float observations. JAMSTEC Rep Res Dev 8:47–59CrossRefGoogle Scholar
  10. Hosoda S, Nonaka M, Tomita T, Taguchi B, Tomita H, Iwasaka N (2015) Impact of downward heat penetration below shallow seasonal thermocline on sea surface temperature. J Oceanogr. doi: 10.1007/s10872-015-0275-7
  11. Kida S et al (2015) Oceanic fronts and jets around Japan—a review. J Oceanogr. doi: 10.1007/s10872-015-0283-7
  12. Komori N, Takahashi K, Komine K, Motoi T, Zhang X, Sagawa G (2005) Description of sea-ice component of coupled ocean–sea-ice model for the Earth Simulator (OIFES). J Earth Simul 4:31–45Google Scholar
  13. Kwon Y-O, Alexander MA, Bond NA, Frankignoul C, Nakamura H, Qiu B, Thompson L (2010) Role of the Gulf Stream and Kuroshio–Oyashio systems in large-scale atmosphere–ocean interaction: a review. J Clim 23:3249–3281. doi: 10.1175/2010JCLI3343.1 CrossRefGoogle Scholar
  14. 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 Simul 1:35–56Google Scholar
  15. Minobe S, Kuwano-Yoshida A, Komori N, Xie S-P, Small RJ (2008) Influence of the Gulf Stream on the troposphere. Nature 452:206–209. doi: 10.1038/nature06690 CrossRefGoogle Scholar
  16. Miyama T, Nonaka M, Nakamura H, Kuwano-Yoshida A (2012) A striking early-summer event of a convective rainband persistent along the warm Kuroshio in the East China Sea. Tellus A 64:1–9. doi: 10.3402/tellusa.v64i0.18962 CrossRefGoogle Scholar
  17. Mizuno K, White WB (1983) Annual and interannual variability in the Kuroshio Current system. J Phys Oceanogr 13:1847–1867CrossRefGoogle Scholar
  18. Nakamura M, Miyama T (2014) Impacts of the Oyashio temperature front on the regional climate. J Clim 27:7861–7873. doi: 10.1175/JCLI-D-13-00609.1 CrossRefGoogle Scholar
  19. Nakamura H, Sampe T, Tanimoto Y, Shimpo A (2004) Observed associations among storm track, jet streams and midlatitude oceanic fronts. In: Wang C, Xie S-P, Carton JA (eds) Earth’s climate: the ocean–atmosphere interaction, geophysical monograph series, vol 147. AGU, Washington, D.C., pp 329–345Google Scholar
  20. Nakamura H, Sampe T, Goto A, Ohfuchi W, Xie S-P (2008) On the importance of midlatitude oceanic frontal zones for the mean state and dominant variability in the tropospheric circulation. Geophys Res Lett 35(15):L15709. doi: 10.1029/2008GL34010 CrossRefGoogle Scholar
  21. Namias J, Born RM (1970) Temporal coherence in North Pacific sea-surface temperature patterns. J Geophys Res 75. doi: 10.1029/JC075i030p05952
  22. Nonaka M, Xie S-P (2003) Covariations of sea surface temperature and wind over the Kuroshio and its extension: evidence for ocean-to-atmosphere feedback. J Clim 16:1404–1413CrossRefGoogle Scholar
  23. Nonaka M, Nakamura H, Tanimoto Y, Kagkimoto T, Sasaki H (2006) Decadal variability in the Kuroshio–Oyashio Extension simulated in an eddy-resolving OGCM. J Clim 19:1970–1989CrossRefGoogle Scholar
  24. Nonaka M, Nakamura H, Tanimoto Y, Kagkimoto T, Sasaki H (2008) Interannual-to-decadal variability in the Oyashio and its influence on temperature in the subarctic frontal zone: an eddy-resolving OGCM simulation. J Clim 21:6283–6303CrossRefGoogle Scholar
  25. Nonaka M, Nakamura H, Taguchi B, Komori N, Kuwano-Yoshida A, Takaya K (2009) Air–sea heat exchanges characteristic of a prominent midlatitude oceanic front in the south Indian ocean as simulated in a high-resolution coupled GCM. J Clim 22:6515–6535CrossRefGoogle Scholar
  26. Norris JR (2000) Interannual and interdecadal variability in the storm track, cloudiness, and sea surface temperature over the summertime North Pacific. J Clim 13:422–430CrossRefGoogle Scholar
  27. O’Neill LW, Chelton DB, Esbensen SK (2003) Observations of SST-induced perturbations of the wind stress field over the Southern Ocean on seasonal time scales. J Clim 16:2340–2354CrossRefGoogle Scholar
  28. O’Reilly CH, Czaja A (2014) The response of the pacific storm track and atmospheric circulation to Kuroshio Extension variability. Q J R Meteorol Soc. doi: 10.1002/qj.2334
  29. Ogawa F, Nakamura H, Nishii K, Miyasaka T, Kuwano-Yoshida A (2012) Dependence of the climatological axial latitudes of the tropospheric westerlies and storm tracks on the latitude of an extratropical oceanic front. Geophys Res Lett 39:L05804. doi: 10.1029/2011GL049922 Google Scholar
  30. Okajima S, Nakamura H, Nishii K, MiyasakaI T, Kuwano-Yoshida A (2014) Assessing the importance of prominent warm SST anomalies over the midlatitude North Pacific in forcing large-scale atmospheric anomalies during 2011 summer and autumn. J Clim 27:3889–3903CrossRefGoogle Scholar
  31. Onogi K et al (2007) The JRA-25 reanalysis. J Meteorol Soc Jpn 85:369–432CrossRefGoogle Scholar
  32. Pacanowski RC, Griffies SM (2000) MOM 3.0 manual. Geophysical Fluid Dynamics Laboratory/National Oceanic and Atmospheric Administration, p 680Google Scholar
  33. Picault J, Ioualalen M, Menkes C, Delcroix T, McPhaden MJ (1996) Mechanism of the zonal displacements of the Pacific warm pool: implications for ENSO. Science 274:1486–1489CrossRefGoogle Scholar
  34. Qiu B, Hacker P, Chen S, Donohue KA, Watts DR (2006) Observations of the subtropical mode water evolution from the Kuroshio Extension system study. J Phys Oceanogr 36:457–472CrossRefGoogle Scholar
  35. Sampe T, Nakamura H, Goto A, Ohfuchi W (2010) Significance of a midlatitude oceanic frontal zone in the formation of a storm track and an eddy-driven westerly jet. J Clim 23:1793–1814CrossRefGoogle Scholar
  36. Sasaki H, Klein P (2012) SSH wavenumber spectra in the North Pacific from a high-resolution realistic simulation. J Phys Oceanogr 42:1233–1241. doi: 10.1175/JPO-D-11-0180.1 CrossRefGoogle Scholar
  37. 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, Berlin, pp 157–185CrossRefGoogle Scholar
  38. Sasaki YN, Minobe S, Asai T, Inatsu M (2012) Influence of the Kuroshio in the East China Sea on the early summer (Baiu) rain. J Clim 27:6627–6645CrossRefGoogle Scholar
  39. Sasaki YN, Minobe S, Schneider N (2013) Decadal response of the Kuroshio Extension jet to Rossby waves: observation and thin-jet theory. J Phys Oceanogr 43:442–456CrossRefGoogle Scholar
  40. Small RJ, de Szoeke SP, Xie S-P, O’Neill L, Seo H, Song Q, Cornillon P, Spall M, Minobe S (2008) Air–sea interaction over ocean fronts and eddies. Dyn Atmos Oceans 45:274–319CrossRefGoogle Scholar
  41. SSALTO/DUACS User Handbook (2011) (M)SLA and (M)ADT near-real time and delayed time products. CLS-DOS-NT-06-034, Issue 4.2Google Scholar
  42. Sugimoto S (2014) Influence of SST anomalies on winter turbulent heat fluxes in the Eastern Kuroshio–Oyashio confluence region. J Clim 27:9349–9358. doi: 10.1175/JCLI-D-14-00195.1 CrossRefGoogle Scholar
  43. Sugimoto S, Hanawa K (2011) Roles of SST anomalies on the wintertime turbulent heat fluxes in the Kuroshio–Oyashio confluence region: influences of warm eddies detached from the Kuroshio Extension. J Clim 24:6551–6561CrossRefGoogle Scholar
  44. Taguchi B, Xie S-P, Mitsudera H, Kubokawa A (2005) Response of the Kuroshio Extension to Rossby waves associated with the 1970s climate regime shift in a high-resolution ocean model. J Clim 18(15):2979–2995CrossRefGoogle Scholar
  45. Taguchi B, Nakamura H, Nonaka M, Xie S-P (2009) Influences of the Kuroshio/Oyashio Extensions on air–sea heat exchanges and storm-track activity as revealed in regional atmospheric model simulations for the 2003/04 cold season. J Clim 22:6536–6560CrossRefGoogle Scholar
  46. Taguchi B, Nakamura H, Nonaka M, Komori N, Kuwano-Yoshida A, Takaya K, Goto A (2012) Seasonal evolutions of atmospheric response to decadal SST anomalies in the North Pacific subarctic frontal zone: observations and a coupled model simulation. J Clim 25:111–139CrossRefGoogle Scholar
  47. Tanimoto Y, Xie S-P, Kai K, Okajima H, Tokinaga H, Murayama T, Nonaka M, Nakamura H (2009) Observations of marine atmospheric boundary layer transitions across the summer Kuroshio Extension. J Clim 22:1360–1374CrossRefGoogle Scholar
  48. Tomita T, Sato H, Nonaka M, Hara M (2007) Interdecadal variability of the early summer surface heat flux in the Kuroshio region and its impact on the Baiu frontal activity. Geophys Res Lett 34, L10708. doi: 10.1029/2007GL029676
  49. Xie S-P (2004) Satellite observations of cool ocean–atmosphere interaction. Bull Am Meteorol Soc 85:195–208CrossRefGoogle Scholar
  50. Xie S-P, 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 30:2798–2813CrossRefGoogle Scholar
  51. Yu L, Jin X, Weller RA (2008) Multidecade global flux datasets from the objectively analyzed air–sea fluxes (OAFlux) project: latent and sensible heat fluxes, ocean evaporation, and related surface meteorological variables. Woods Hole Oceanographic Institution, OAFlux Project Technical Report. OA-2008-01, Woods Hole, MA, p 64Google Scholar

Copyright information

© The Oceanographic Society of Japan and Springer Japan 2015

Authors and Affiliations

  • Shigeki Hosoda
    • 1
  • Masami Nonaka
    • 2
  • Yoshikazu Sasai
    • 1
  • Hideharu Sasaki
    • 2
  1. 1.Research and Develop Center for Global ChangeJapan Agency for Marine-Earth Science and TechnologyYokosukaJapan
  2. 2.Application LaboratoryJapan Agency for Marine-Earth Science and TechnologyYokohamaJapan

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