2011
DOI: 10.1007/s13131-011-0117-4
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The three-dimensional structure and seasonal variation of the North Pacific meridional overturning circulation

Abstract: The three-dimensional structure and the seasonal variation of the North Pacific meridional overturning circulation (NPMOC) are analyzed based on the Simple Ocean Data Assimilation data and Argo profiling float data. The NPMOC displays a multi-cell structure with four cells in the North Pacific altogether. The TC and the STC are a strong clockwise meridional cell in the low latitude ocean and a weaker clockwise meridional cell between 7 • N and 18 • N, respectively, while the DTC and the subpolar cell are a wea… Show more

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Cited by 8 publications
(12 citation statements)
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“…Secondary maxima are identifiable in midlatitudes especially for the northern hemisphere. Unlike the basically horizontal features in sea temperature patterns of the upper ~200 m zone (see Our results add new evidence to previous findings that seasonal variations of the MOC can extend as deep as 1000 m due to zonal wind stress and the east-west slope of sea level (Kanzow et al 2010;Liu et al 2011). Meanwhile, one has to be aware of other possible contributing factors to the observed structures such as wind stress curl forcing for the mid-latitude part of the signal, and seasonal displacements of some western boundary currents.…”
Section: Annual and Semiannual Amplitudessupporting
confidence: 82%
“…Secondary maxima are identifiable in midlatitudes especially for the northern hemisphere. Unlike the basically horizontal features in sea temperature patterns of the upper ~200 m zone (see Our results add new evidence to previous findings that seasonal variations of the MOC can extend as deep as 1000 m due to zonal wind stress and the east-west slope of sea level (Kanzow et al 2010;Liu et al 2011). Meanwhile, one has to be aware of other possible contributing factors to the observed structures such as wind stress curl forcing for the mid-latitude part of the signal, and seasonal displacements of some western boundary currents.…”
Section: Annual and Semiannual Amplitudessupporting
confidence: 82%
“…The overturning region of the TC is between 175  E and 100  W, above 200 m, and the center and vertical range change seasonally (Liu et al, 2011). We calculated the TC northward and southward transports by integrating meridional velocities between 175  E and 100  W above and below 47.61 m depth at the central latitude (Eq.2); TC upward and downward transports were computed by integrating upward velocities between 0.25  N and 3.75  N, and downward velocities between 3.75  N and 6.25  N from 175  E to 100  W at 47.61 m (Eq.3).…”
Section: Interannual Variability In the Tc Volume Transportmentioning
confidence: 99%
“…The STC northward transport is strongest in winter and weakest in summer, while STC southward transport is strongest in summer and weakest in spring. Liu et al (2011) argue that the seasonal changes in the TC and the STC are caused by zonal wind stress and the sealevel east-west slope.…”
Section: Introductionmentioning
confidence: 99%
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