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Synoptic observation of Central Mode Water in its formation region in spring 2003

Journal of Oceanography volume 70, pages 521–534 (2014)Cite this article

Abstract

Hydrographic data east of Japan from five research cruises and Argo profiling floats in spring 2003 have been analyzed to examine the relationship of the formation of Central Mode Water (CMW) and Transition Region Mode Water (TRMW) in late winter 2003 to thermohaline fronts and mesoscale eddies. TRMW and the denser variety of CMW (D-CMW) were formed continuously just south of the subarctic frontal zone between 155°E and 165°W with little relation to eddies, suggesting that the absence of the permanent thermocline and halocline in this area is essential for the formation. The lighter variety of CMW (L-CMW) was formed south of the Kuroshio bifurcation front and east of 165°E, partly in an anticyclonic eddy associated with the Kuroshio Extension. Some portion of D-CMW and L-CMW likely had been subducted to the permanent pycnocline by crossing southward the Kuroshio bifurcation front and the Kuroshio Extension front, respectively. In contrast, the formation of these waters in the western regions was inactive and was significantly different from that described previously using multiyear Argo float data. West of 155°E, TRMW and D-CMW were formed only in two anticyclonic eddies that had been detached from the Kuroshio Extension 1–2 years ago. L-CMW was hardly formed west of 165°E, which might be related to the upstream Kuroshio Extension being in its stable state characterized by low regional eddy activity.

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References

  • Aoyama M, Hirose K, Nemoto K, Takatsuki Y, Tsumune D (2008) Water masses labeled with global fallout 137Cs formed by subduction in the North Pacific. Geophys Res Lett 35:L01604. doi:10.1029/2007GL031964

    Google Scholar 

  • de Boyer Montégut C, Madec G, Fischer AS, Lazar A, Iudicone D (2004) Mixed layer depth over the global ocean: an examination of profile data and a profile-based climatology. J Geophys Res 109:C12003. doi:10.1029/2004JC002378

    Article  Google Scholar 

  • Ducet N, Le Traon PY, Reverdin F (2000) Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2. J Geophys Res 105:19477–19498

    Article  Google Scholar 

  • Freeland H et al (2010) Argo: a decade of progress. In: Hall J, Harrison DE, Stammer D (eds) Proceedings of OceanObs’09: Sustained Ocean Observations and Information for Society vol 2. 21–25 Sept 2009, ESA Publication WPP-306, Venice, Italy, doi:10.5270/OceanObs09.cwp.32

  • Hanawa K, Sugimoto S (2004) ‘Reemergence’ areas of winter sea surface temperature anomalies in the world’s oceans. Geophys Res Lett 31:L10303. doi:10.1029/2004GL019904

    Article  Google Scholar 

  • Huang RX, Qiu B (1994) Three-dimensional structure of the wind-driven circulation in the subtropical North Pacific. J Phys Oceanogr 24:1608–1622

    Article  Google Scholar 

  • Ishii M, Inoue HY, Matsueda H, Saito S, Fushimi K, Nemoto K, Yano T, Nagai H, Midorikawa T (2001) Seasonal variation in total inorganic carbon and its controlling processes in surface waters of the western North Pacific subtropical gyre. Mar Chem 75:17–32

    Article  Google Scholar 

  • Isoguchi O, Kawamura H, Oka E (2006) Quasi-stationary jets transporting surface warm waters across the transition zone between the subtropical and the subarctic gyres in the North Pacific. J Geophys Res 111:C10003. doi:10.1029/2005JC003402

    Article  Google Scholar 

  • Itoh S, Yasuda I (2010a) Water mass structure of warm and cold anticyclonic eddies in the western boundary region of the subarctic North Pacific. J Phys Oceanogr 40:2624–2642

    Article  Google Scholar 

  • Itoh S, Yasuda I (2010b) Characteristics of mesoscale eddies in the Kuroshio–Oyashio Extension region detected from the distribution of the sea surface height anomaly. J Phys Oceanogr 40:1018–1034

    Article  Google Scholar 

  • Itoh S, Shimizu Y, Ito S, Yasuda I (2011) Evolution and decay of a warm-core ring within the western subarctic gyre of the North Pacific, as observed by profiling floats. J Oceanogr 67:281–293

    Article  Google Scholar 

  • Japan Meteorological Agency (2005) Data report of oceanographic and marine meteorological observations. No. 94, CD-ROM

  • Kawabe M (2005) Preliminary Report of the Hakuho Maru Cruise KH-03-1. Ocean Research Institute, The University of Tokyo

  • Kawai H (1972) Hydrography of the Kuroshio Extension. In: Stommel H, Yoshida K (eds) Kuroshio: its physical aspects. University of Tokyo Press, Tokyo, pp 235–352

    Google Scholar 

  • Kobashi F, Kubokawa A (2012) Review on North Pacific subtropical countercurrent and subtropical front: role of mode water in ocean circulation and climate. J Oceanogr 68:21–43

    Article  Google Scholar 

  • Komaki K, Kawabe M (2009) Deep-circulation current through the main gap of the emperor seamounts chain in the North Pacific. Deep Sea Res I 56:305–313

    Article  Google Scholar 

  • Kono T, Kawasaki Y (1997) Modification of the western subarctic water by exchange with the Okhotsk sea. Deep Sea Res 44:689–711

    Article  Google Scholar 

  • Kouketsu S, Tomita H, Oka E, Hosoda S, Kobayashi T, Sato K (2012) The role of meso-scale eddies in mixed layer deepening and mode water formation in the western North Pacific. J Oceanogr 68:63–77

    Article  Google Scholar 

  • Ladd C, Thompson L (2000) Formation mechanisms for North Pacific central and eastern subtropical mode waters. J Phys Oceanogr 30:868–887

    Article  Google Scholar 

  • Levine ER, White WB (1983) Bathymetric influences upon the character of North Pacific fronts, 1976–1980. J Geophys Res 88:9617–9625

    Article  Google Scholar 

  • Masuzawa J (1969) Subtropical mode water. Deep Sea Res 16:463–472

    Google Scholar 

  • Mecking S, Warner MJ (2001) On the subsurface CFC maxima in the subtropical North Pacific thermocline and their relation to mode waters and oxygen maxima. J Geophys Res 106:22179–22198

    Article  Google Scholar 

  • Midorikawa T, Ishii M, Nemoto K, Kamiya H, Nakadate A, Masuda S, Matsueda H, Nakano T, Inoue HY (2006) Interannual variability of winter oceanic CO2 and air-sea CO2 flux in the western North Pacific for 2 decades. J Geophys Res. 111:C07S02. doi:10.1029/2005JC003095

    Google Scholar 

  • Mizuno K, White WB (1983) Annual and interannual variability in the Kuroshio current system. J Phys Oceanogr 13:1847–1867

    Article  Google Scholar 

  • 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

    Article  Google Scholar 

  • Ohtani K (1971) Studies on the change of the hydrographic conditions in the Funka Bay. II. Characteristics of the waters occupying the Funka Bay. Bull Fac Fish Hokkaido Univ 22:58–66

    Google Scholar 

  • Ohtani K (1989) The role of the Sea of Okhotsk on the Oyashio Water. Umi Sora 65:63–83 (in Japanese)

    Google Scholar 

  • Oka E (2009) Seasonal and interannual variation of North Pacific subtropical mode water in 2003–2006. J Oceanogr 65:151–164

    Article  Google Scholar 

  • Oka E, Qiu B (2012) Progress of North Pacific mode water research in the past decade. J Oceanogr 68:5–20

    Article  Google Scholar 

  • Oka E, Suga T (2003) Formation region of North Pacific subtropical mode water in the late winter of 2003. Geophys Res Lett 30:2205. doi:10.1029/2003GL018581

    Article  Google Scholar 

  • Oka E, Suga T (2005) Differential formation and circulation of North Pacific central mode water. J Phys Oceanogr 35:1997–2011

    Article  Google Scholar 

  • Oka E, Talley LD, Suga T (2007) Temporal variability of winter mixed layer in the mid- to high-latitude North Pacific. J Oceanogr 63:293–307

    Article  Google Scholar 

  • Oka E, Toyama K, Suga T (2009) Subduction of North Pacific central mode water associated with subsurface mesoscale eddy. Geophys Res Lett 36:L08607. doi:10.1029/2009GL037540

    Article  Google Scholar 

  • Oka E, Kouketsu S, Toyama K, Uehara K, Kobayashi T, Hosoda S, Suga T (2011a) Formation and subduction of Central Mode Water based on profiling float data, 2003–08. J Phys Oceanogr 41:113–129

    Article  Google Scholar 

  • Oka E, Suga T, Sukigara C, Toyama K, Shimada K, Yoshida J (2011b) “Eddy-resolving” observation of the North Pacific subtropical mode water. J Phys Oceanogr 41:666–681

    Article  Google Scholar 

  • Oka E, Qiu B, Kouketsu S, Uehara K, Suga T (2012) Decadal seesaw of the central and subtropical mode water formation associated with the Kuroshio Extension variability. J Oceanogr 68:355–360

    Article  Google Scholar 

  • Ono T, Watanabe S, Okuda K, Fukasawa M (1998) Distribution of total carbonate and related properties in the North Pacific along 30°N. J Geophys Res 103:30873–30883

    Article  Google Scholar 

  • Qiu B, Chen S (2005) Variability of the Kuroshio Extension jet, recirculation gyre and mesoscale eddies on decadal timescales. J Phys Oceanogr 35:2090–2103

    Article  Google Scholar 

  • Qiu B, Chen S (2006) Decadal variability in the formation of the North Pacific subtropical mode water: oceanic versus atmospheric control. J Phys Oceanogr 36:1365–1380

    Article  Google Scholar 

  • Qiu B, Chen S (2011) Effect of decadal Kuroshio Extension jet and eddy variability on the modification of North Pacific intermediate water. J Phys Oceanogr 41:503–515

    Article  Google Scholar 

  • Qiu B, Chen S, Hacker P (2007) Effect of mesoscale eddies on subtropical mode water variability from the Kuroshio Extension System Study (KESS). J Phys Oceanogr 37:982–1000

    Article  Google Scholar 

  • Reid JL (1965) Intermediate Water of the Pacific Ocean. Johns Hopkins oceanographic studies, vol 2. John Hopkins University Press, Baltimore

  • Roden GI (1970) Aspects of the mid-Pacific transition zone. J Geophys Res 75:1097–1109

    Article  Google Scholar 

  • Roden GI (1972) Temperature and salinity fronts at the boundaries of the subarctic-subtropical transition zone in the western Pacific. J Geophys Res 77:7175–7187

    Article  Google Scholar 

  • Roemmich D, Johnson GC, Riser S, Davis R, Gilson J, Owens WB, Garzoli SL, Schmid C, Ignaszewski M (2009) Argo: the challenge of continuing 10 years of progress. Oceanography 22:46–55

    Article  Google Scholar 

  • Rossi V, Van Sebille E, Sen Gupta A, Garçon V, England MH (2013) Multi-decadal projections of surface and interior pathways of the Fukushima Cesium-137 radioactive plume. Deep Sea Res I 80:37–46

    Article  Google Scholar 

  • Saito H, Suga T, Hanawa K, Watanabe T (2007) New type of pycnostad in the western subtropical-subarctic transition region of the North Pacific: transition region mode water. J Oceanogr 63:589–600

    Article  Google Scholar 

  • Saito H, Suga T, Hanawa K, Shikama N (2011) The transition region mode water of the North Pacific and its rapid modification. J Phys Oceanogr 41:1639–1658

    Article  Google Scholar 

  • Shiozaki T, Ito SI, Takahashi K, Saito H, Nagata T, Furuya K (2013) Regional variability of factors controlling the onset timing and magnitude of spring algal blooms in the northwestern North Pacific. J Geophys Res 119:253–265. doi:10.1002/2013JC009187

  • Spall MA (1995) Frontogenesis, subduction, and cross-front exchanges at upper ocean fronts. J Geophys Res 100:2543–2557

    Article  Google Scholar 

  • Stabeno PJ, Ladd C, Reed RK (2009) Observations of the Aleutian North Slope Current, Bering Sea, 1996–2001. J Geophys Res 114:C05015. doi:10.1029/2007JC004705

    Google Scholar 

  • Suga T, Hanawa K, Toba Y (1989) Subtropical mode water in the 137°E section. J Phys Oceanogr 19:1605–1618

    Article  Google Scholar 

  • 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

    Article  Google Scholar 

  • 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

    Article  Google Scholar 

  • Sugimoto S, Hanawa K (2005) Remote reemergence areas of winter sea surface temperature anomalies in the North Pacific. Geophys Res Lett 32:L01606. doi:10.1029/2004GL021410

    Google Scholar 

  • Sugiura J (1958) On the Tsugaru Warm Current. Geophys Mag 28:399–409

    Google Scholar 

  • Talley LD (1988) Potential vorticity distribution in the North Pacific. J Phys Oceanogr 18:89–106

    Article  Google Scholar 

  • Talley LD (1993) Distribution and formation of North Pacific Intermediate Water. J Phys Oceanogr 23:517–537

    Article  Google Scholar 

  • Tomita H, Kouketsu S, Oka E, Kubota M (2011) Locally enhanced wintertime air-sea interaction and deep oceanic mixed layer formation associated with the subarctic front in the North Pacific. Geophys Res Lett 38:L24607. doi:10.1029/2011GL049902

    Article  Google Scholar 

  • Tomosada A (1986) Generation and decay of Kuroshio warm-core rings. Deep Sea Res 33:1475–1486

    Article  Google Scholar 

  • Tsujino H, Yasuda T (2004) Formation and circulation of mode waters of the North Pacific in a high-resolution GCM. J Phys Oceanogr 34:399–415

    Article  Google Scholar 

  • Uehara K, Ito S, Komatsu K (2004) Report of the R/V Shoyo-maru FY2003 1st research cruise. Fisheries Research Agency, Tokyo (in Japanese)

  • Yamashita Y, Tanoue E (2009) Basin scale distribution of chromophoric dissolved organic matter in the Pacific Ocean. Limnol Oceanogr 54:598–609

    Article  Google Scholar 

  • Yasuda I (1997) The origin of the North Pacific intermediate water. J Geophys Res 102:893–909

    Article  Google Scholar 

  • Yasuda I (2003) Hydrographic structure and variability of the Kuroshio–Oyashio transition area. J Oceanogr 59:389–402

    Article  Google Scholar 

  • Yasuda T, Hanawa K (1997) Decadal changes in the mode waters in the midlatitude North Pacific. J Phys Oceanogr 27:858–870

    Article  Google Scholar 

  • Yasuda I, Okuda K, Hirai M (1992) Evolution of a Kuroshio warm-core ring: variability of the hydrographic structure. Deep Sea Res 39:S131–S161

    Article  Google Scholar 

  • Yasuda I, Okuda K, Shimizu Y (1996) Distribution and modification of North Pacific Intermediate Water in the Kuroshio–Oyashio interfrontal zone. J Phys Oceanogr 26:448–465

    Article  Google Scholar 

  • Yuan X, Talley LD (1996) The subarctic frontal zone in the North Pacific: characteristics of frontal structure from climatological data and synoptic surveys. J Geophys Res 101:16491–16508

    Article  Google Scholar 

  • Zhang RX, Hanawa K (1993) Features of the water-mass front in the northwestern North Pacific. J Geophys Res 98:967–975

    Article  Google Scholar 

Download references

Acknowledgments

The authors are grateful to the captain, crew, and scientists participating in the R/V Kofu-maru 0304 cruise, the R/V Seifu-maru 0304 cruise, and the R/V Ryofu-maru 0306 cruise of the Japan Meteorological Agency, the R/V Hakuho-maru KH-03-1 cruise of the Ocean Research Institute, The University of Tokyo, and the R/V Shoyo-maru FY2003 1st research cruise of the Fisheries Research Agency for their efforts in conducting the CTD and XCTD measurements. They also thank Tsuyoshi Ohira for his assistance in preparing the Argo float data and two anonymous reviewers for their helpful comments. The Argo float data used in this study were collected and made freely available by the International Argo Project and the national programs that contribute to it (http://www.argo.ucsd.edu, http://argo.jcommops.org). This study was initiated in 2005 when E.O. was sent from Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology to Scripps Institution of Oceanography (SIO) as a visiting scholar. He thanks the late Nobuo Suginohara and Nobuyuki Shikama for giving him an opportunity to visit SIO. This study is supported by the Japan Society for Promotion of Science (KAKENHI, Grant-in-Aid for Scientific Research (B), No. 21340133 and 25287118) and the Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT; Grant-in-Aid for Scientific Research on Innovative Areas under Grant No. 22106007 and 25121502). Comments from participants at the “Research Meetings on Air-Sea Interaction” in 2011−2013 held as a part of the Collaborative Research Program of Hydrospheric Atmospheric Research Center, Nagoya University and at the research meeting “North Pacific Ocean Circulation and the Changes” in 2013 supported by the Atmosphere and Ocean Research Institute, The University of Tokyo and the Marine Meteorological Society of Japan were helpful.

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Authors and Affiliations

  1. Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, 277-8564, Japan

    Eitarou Oka, Daigo Yanagimoto, Sachihiko Itoh & Shota Katsura

  2. Department of Marine Science, School of Marine Science and Technology, Tokai University, Shizuoka, 424-8610, Japan

    Kazuyuki Uehara

  3. Global Environment and Marine Department, Japan Meteorological Agency, Tokyo, 100-8122, Japan

    Toshiya Nakano

  4. Department of Geophysics, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan

    Toshio Suga

  5. Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, 237-0061, Japan

    Toshio Suga & Shinya Kouketsu

  6. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, 92093-0230, USA

    Lynne D. Talley

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  1. Eitarou Oka
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Oka, E., Uehara, K., Nakano, T. et al. Synoptic observation of Central Mode Water in its formation region in spring 2003. J Oceanogr 70, 521–534 (2014). https://doi.org/10.1007/s10872-014-0248-2

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  • DOI: https://doi.org/10.1007/s10872-014-0248-2

Keywords

  • Central Mode Water
  • Formation
  • Fronts
  • Mesoscale eddies
  • Decadal variability