A role of eddies in formation and transport of North Pacific Subtropical Mode Water

Hiroki Uehara, Toshio Suga, Kimio Hanawa, Nobuyuki Shikama

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

Hydrographic data acquired during 2001 by Argo profiling floats deployed in the Kuroshio recirculation region are used to verify the inference that mesoscale eddies prevailing in the recirculation region play an important role in the formation and transport of North Pacific Subtropical Mode Water (NPSTMW). That is, the deeper winter mixed layer is formed preferentially where the thermocline is deeper in association with anticyclonic eddies. In the succeeding seasons, mesoscale eddies retain NPSTMW during their southwestward movement from the NPSTMW formation region, so that anticylonic eddies contribute substantially to the NPSTMW transportation. The spatial distributions of the mixed layer depth in winter and the NPSTMW thickness in the succeeding seasons, based on the float data, suggest that they are affected by mesoscale eddies. The float data also provide the statistical relations of these quantities against the thermocline depth, which are consistent with our inference.

Original languageEnglish
Pages (from-to)38-1 - 38-4
JournalGeophysical Research Letters
Volume30
Issue number13
DOIs
Publication statusPublished - 2003 Jul 1

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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