Meridional overturning circulation of the deep Pacific estimated assuming the vertical advective-diffusive balance

Takahiro Endoh, Toshiyuki Hibiya

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

Assuming the vertical advective-diffusive balance, we calculate the meridional overturning circulation of the deep Pacific based on the observed density field. In addition to the global distribution of diapycnal diffusivity in the pycnocline, bottom-intensified mixing that follows a Gaussian distribution with depth is taken into account. When diapycnal diffusivity in the pycnocline is assumed to extend uniformly to the bottom, the northward transport of the Lower Circumpolar Deep Water (LCDW) across the equator is only 1 Sv. When the bottom-intensified mixing is incorporated, the meridional overturning circulation increases, decreases, or even reverses depending on the vertical gradient of diapycnal diffusivity. The northward transport of the LCDW crossing the equator becomes comparable to the estimates from previous current meter moorings as well as hydrographic surveys only when the mixing extends well above the rough ocean bottom and hence the vertical gradient of diapycnal diffusivity is small.

元の言語英語
記事番号L11602
ジャーナルGeophysical Research Letters
34
発行部数11
DOI
出版物ステータス出版済み - 6 16 2007

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meridional circulation
diffusivity
pycnocline
deep water
equators
mooring
hydrographic survey
gradients
ocean bottom
normal density functions
seafloor
estimates
distribution

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

これを引用

Meridional overturning circulation of the deep Pacific estimated assuming the vertical advective-diffusive balance. / Endoh, Takahiro; Hibiya, Toshiyuki.

:: Geophysical Research Letters, 巻 34, 番号 11, L11602, 16.06.2007.

研究成果: ジャーナルへの寄稿記事

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