Geostrophic meridional transport in tropical Northwest Pacific based on Argo profiles

Zhichun Zhang; Dongliang Yuan; Peter C. Chu

doi:10.1007/s00343-013-2169-0

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Geostrophic meridional transport in tropical Northwest Pacific based on Argo profiles

Updated：2023-05-16

- Geostrophic meridional transport in tropical Northwest Pacific based on Argo profiles
- Journal of Oceanology and Limnology Vol. 31, Issue 3, Pages: 656-664(2013)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Key Laboratory of Ocean Circulation and Waves Chinese Academy of Sciences
  3. Graduate University of Chinese Academy of Sciences
  4. Naval Ocean Analysis and Prediction (NOAP) Laboratory Department of Oceanography Naval Postgraduate School
- Author bio：
- Funds：
- DOI：10.1007/s00343-013-2169-0
  CLC：
- Online First：08 May 2013，
  
  Published：2013
- Accepted：
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Zhang, Z., Yuan, D. & Chu, P.C. Geostrophic meridional transport in tropical Northwest Pacific based on Argo profiles., Chin. J. Ocean. Limnol. 31, 656–664 (2013). https://doi.org/10.1007/s00343-013-2169-0
DOI：

Zhang, Z., Yuan, D. & Chu, P.C. Geostrophic meridional transport in tropical Northwest Pacific based on Argo profiles., Chin. J. Ocean. Limnol. 31, 656–664 (2013). https://doi.org/10.1007/s00343-013-2169-0 DOI：

摘要

Abstract

Absolute geostrophic currents in the North Pacific Ocean were calculated using P-vector method from newly gridded Argo profiling float data collected during 2004–2009. The meridional volume transport of geostrophic currents differed significantly from the classical Sverdrup balance

with differences of 10×106–20×106m3/s in the interior tropical Northwest Pacific Ocean. Analyses showed that errors of wind stress estimation could not explain all of the differences. The largest differences were found in the areas immediately north and south of the bifurcation latitude of the North Equatorial Current west of the dateline

and in the recirculation area of the Kuroshio and its extension

where nonlinear eddy activities were robust. Comparison of the geostrophic meridional transport and the wind-driven Sverdrup meridional transport in a high-resolution OFES simulation showed that nonlinear effects of the ocean circulation were the most likely reason for the differences. It is therefore suggested that the linear

steady wind-driven dynamics of the Sverdrup theory cannot completely explain the meridional transport of the interior circulation of the tropical Northwest Pacific Ocean.

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references

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