Journal of Oceanography

, Volume 68, Issue 2, pp 361–368

Variation of the southward interior flow of the North Pacific subtropical gyre, as revealed by a repeat hydrographic survey

Authors

    • Research Institute for Global ChangeJapan Agency for Marine-Earth Science and Technology
  • Hiroshi Ichikawa
    • Research Institute for Global ChangeJapan Agency for Marine-Earth Science and Technology
  • Yasushi Yoshikawa
    • Mutsu Institute for OceanographyJapan Agency for Marine-Earth Science and Technology
  • Shoichi Kizu
    • Graduate School of ScienceTohoku University
  • Kimio Hanawa
    • Graduate School of ScienceTohoku University
Short Contribution

DOI: 10.1007/s10872-012-0102-3

Cite this article as:
Nagano, A., Ichikawa, H., Yoshikawa, Y. et al. J Oceanogr (2012) 68: 361. doi:10.1007/s10872-012-0102-3

Abstract

Baroclinic variations of the southward flow in the interior region of the North Pacific subtropical gyre are presented with five hydrographic sections from San Francisco to near Japan during 2004–2006. The volume transport averaged temperature of the interior flow, which varies vigorously by a maximum of 0.8°C, is negatively correlated with the transport in the layer of density 24.5–26.5σθ, associated with changes in the vertical current structure. Transport variation in this density layer is thus mainly responsible for the thermal impact of the interior flow on the heat transport of the subtropical gyre.

Keywords

North PacificSubtropical gyreInterior regionVolume transportVolume transport averaged temperature

Copyright information

© The Oceanographic Society of Japan and Springer 2012