TERRAPUB Journal of Oceanography

Journal of Oceanography, Vol. 59 (No. 6), pp. 945-955, 2003

Short contribution

Decadal Variability of Subsurface Temperature in the Central North Pacific

Satoshi Sugimoto*, Takashi Yoshida and Tadashi Ando

Climate and Marine Department, Japan Meteorological Agency, Chiyoda-ku, Tokyo 100-8122, Japan

(Received 11 July 2002; in revised form 11 July 2003; accepted 18 July 2003)

Abstract: Decadal variability of subsurface temperature in the North Pacific has been investigated. Two dominant regions were found; the central subarctic region (CSa) and the north-eastern subtropical region (NESt). In CSa, cooling (warming) of wintertime subsurface temperature corresponds to the large (small) temperature gradient and southward (northward) shift of subsurface temperature front, associated with the increase (decrease) of positive wind stress curl and the southward (northward) shift of curl t zero line with 2 years delay. It is suggested that the relocation of subtropical-subarctic boundary plays an important role. In NESt, importance of heat flux through the sea surface and heat divergence in the Ekman layer is also discussed.

*Corresponding author E-mail: s_sugimoto@met.kishou.go.jp

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