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Journal of Geophysical Research: Oceans (1978–2012)

Cover image for Journal of Geophysical Research: Oceans (1978–2012)

December 2012

Volume 117, Issue C12

Currently known as: Journal of Geophysical Research: Oceans

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      Winter-to-winter recurrence of atmospheric circulation anomalies in the central North Pacific

      Xia Zhao and Jianping Li

      Version of Record online: 22 DEC 2012 | DOI: 10.1029/2012JC008248

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      Key Points

      • The effect of external forcing (ENSO and sea ice) on the atmospheric WWR
      • Internal atmospheric dynamics
      • Seasonal change in storm track and associated synoptic eddy
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      Circulation in Drake Passage revisited using new current time series and satellite altimetry: 1. The Yaghan Basin

      Ramiro Ferrari, Christine Provost, Alice Renault, Nathalie Sennéchael, Nicolas Barré, Young-Hyang Park and Jae Hak Lee

      Version of Record online: 22 DEC 2012 | DOI: 10.1029/2012JC008264

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      Key Points

      • Current meter observations at the Yaghan Basin
      • Vertical structure of the velocity variation of the current meter observations
      • Satellite-derived surface geostrophic velocities
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      Variability in the Deep Western Boundary Current: Local versus remote forcing

      B. Peña-Molino, T. M. Joyce and J. M. Toole

      Version of Record online: 22 DEC 2012 | DOI: 10.1029/2012JC008369

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      Key Points

      • OW and uLSW property changes are in phase and have opposite sign to dLSW
      • High-frequency velocity changes at Line W are related to Gulf Stream variability
      • Larger DWBC transport is associated with recently ventilated uLSW and OW
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      Characteristics of colored dissolved organic matter (CDOM) in the Arctic outflow in the Fram Strait: Assessing the changes and fate of terrigenous CDOM in the Arctic Ocean

      Mats A. Granskog, Colin A. Stedmon, Paul A. Dodd, Rainer M. W. Amon, Alexey K. Pavlov, Laura de Steur and Edmond Hansen

      Version of Record online: 21 DEC 2012 | DOI: 10.1029/2012JC008075

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      Key Points

      • Terrigenous CDOM absorption loss is significant within Arctic Ocean
      • Export of CDOM through Fram Strait could be up to 50% of inputs
      • Results imply that terms in the CDOM budget need to be better constrained
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      Near 13 day barotropic ocean response to the atmospheric forcing in the North Pacific

      Hanna Na, Jae-Hun Park, D. Randolph Watts, Kathleen A. Donohue and Ho Jin Lee

      Version of Record online: 13 DEC 2012 | DOI: 10.1029/2012JC008211

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      Key Points

      • Ocean bottom pressure variability is strong near 13 days in the North Pacific
      • Large-scale wind stress curl forcing induces the near 13 day variability
      • Bottom topography confines the strongest response to the western region
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      Influence of upper-ocean stratification on tropical cyclone-induced surface cooling in the Bay of Bengal

      S. Neetu, Matthieu Lengaigne, Emmanuel M. Vincent, Jérôme Vialard, Gurvan Madec, Guillaume Samson, M. R. Ramesh Kumar and Fabien Durand

      Version of Record online: 13 DEC 2012 | DOI: 10.1029/2012JC008433

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      Key Points

      • TC-induced cooling in Bay of Bengal is far weaker during post than pre-monsoon
      • Thermal stratification changes account for ~70% of this cooling inhibition
      • Haline stratification explains most of cooling inhibition along Bay northern rim
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      Atmospheric infrasound from nonlinear wave interactions during Hurricanes Felicia and Neki of 2009

      Justin E. Stopa, Kwok Fai Cheung, Milton A. Garcés and Nickles Badger

      Version of Record online: 13 DEC 2012 | DOI: 10.1029/2012JC008257

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      Key Points

      • Infrasound was well recorded from Hurricane Felicia and Neki at Kailua-Kona, HI
      • Infrasound records corroborate numerical wave and microbarom model results
      • Data support the use of infrasound records for warning of hurricane waves
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      Observation of spiciness interannual variability in the Pacific pycnocline

      Nicolas Kolodziejczyk and Fabienne Gaillard

      Version of Record online: 13 DEC 2012 | DOI: 10.1029/2012JC008365

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      Key Points

      • Observations of spiciness propagating in the southern Pacific pycnocline
      • Observation of Interannual anomaly of generation of spiciness in the subtropics
      • Spiciness interannual generation correlated with ENSO
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      Evaluating the opposing wave interaction hypothesis for the generation of microbaroms in the eastern North Pacific

      Kristoffer T. Walker

      Version of Record online: 13 DEC 2012 | DOI: 10.1029/2012JC008409

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      Key Points

      • Opposing waves explains pelagic microbarom sources in the eastern North Pacific
      • Source strength primarily controls the detection of North Pacific microbaroms
      • Observations of microbarom radiation can be used to help validate NWW3 models
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      Submesoscale eddies near the Kuril Straits: Asymmetric generation of clockwise and counterclockwise eddies by barotropic tidal flow

      T. Nakamura, J. P. Matthews, T. Awaji and H. Mitsudera

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2011JC007754

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      Key Points

      • We discovered the presence of numerous small-scale eddies near the Kuril Islands
      • Our simulation suggested the observed eddies are generated by barotropic tides
      • Tidal flow causes asymmetric generation of clockwise and counterclockwise eddies
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      Sensitivity of Nd isotopic composition in seawater to changes in Nd sources and paleoceanographic implications

      J. Rempfer, Thomas F. Stocker, Fortunat Joos and Jean-Claude Dutay

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008161

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      Key Points

      • Revisit major finding of Tachikawa et al. [2003]
      • Changes in Nd sources have the potential to affect eNd
      • But substantial changes are required to generate large-scale changes in eNd
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      Composition and fluxes of freshwater through Davis Strait using multiple chemical tracers

      Kumiko Azetsu-Scott, Brian Petrie, Philip Yeats and Craig Lee

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008172

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      Key Points

      • Application of a new method to quantify Arctic Water in the northwest Atlantic
      • Estimate of composition and fluxes of freshwater through Davis Strait
      • Dominant southward flow by Arctic outflow, northward flow by glacial meltwater
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      A 20 year independent record of sea surface temperature for climate from Along-Track Scanning Radiometers

      Christopher J. Merchant, Owen Embury, Nick A. Rayner, David I. Berry, Gary K. Corlett, Katie Lean, Karen L. Veal, Elizabeth C. Kent, David T. Llewellyn-Jones, John J. Remedios and Roger Saunders

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008400

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      Key Points

      • New satellite-based record of sea surface temperature since 1991
      • New record is very accurate and stable and cleanly reveals variability
      • Record independently corroborates in situ marine climate change estimates
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      Mode water ventilation and subtropical countercurrent over the North Pacific in CMIP5 simulations and future projections

      Lixiao Xu, Shang-Ping Xie and Qinyu Liu

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008377

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      Key Points

      • The STCC is anchored by mode water to the north in CMIP5 models
      • Intermodel difference in mode water simulation gives rises to STCC variability
      • The weakened STCC and mode water are common to CMIP5 projections
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      Ventilation of the equatorial Atlantic by the equatorial deep jets

      Peter Brandt, Richard J. Greatbatch, Martin Claus, Sven-Helge Didwischus, Verena Hormann, Andreas Funk, Johannes Hahn, Gerd Krahmann, Jürgen Fischer and Arne Körtzinger

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008118

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      Key Points

      • Equatorial deep jets strongly affect oxygen distribution/variability
      • Mean oxygen distribution in the equatorial Atlantic at intermediate depth
      • Gravest equatorial basin mode forces an advection-diffusion model
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      Inferring dynamics from the wavenumber spectra of an eddying global ocean model with embedded tides

      James G. Richman, Brian K. Arbic, Jay F. Shriver, E. Joseph Metzger and Alan J. Wallcraft

      Version of Record online: 12 DEC 2012 | DOI: 10.1029/2012JC008364

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      Key Points

      • Ocean dynamics can be inferred from wave number spectra
      • Internal waves, noise affect altimeter wave number spectra
      • QG dynamics must be separated from internal waves for spectral estimation
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      Representation of the Antarctic Circumpolar Current in the CMIP5 climate models and future changes under warming scenarios

      A. J. S. Meijers, E. Shuckburgh, N. Bruneau, J.-B. Sallee, T. J. Bracegirdle and Z. Wang

      Version of Record online: 11 DEC 2012 | DOI: 10.1029/2012JC008412

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      Key Points

      • Analysis of ACC in CMIP5 models
      • Analysis of CMIP5 models under climate forcing
      • Broad improvement over CMIP3, but still a variety of responses to forcing
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      Nonlocal transport due to Langmuir circulation in a coastal ocean

      T. Kukulka, A. J. Plueddemann and P. P. Sullivan

      Version of Record online: 11 DEC 2012 | DOI: 10.1029/2012JC008340

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      Key Points

      • Examines large-scale velocity structures in a coastal turbulent boundary layer
      • Simulations with wave-current interactions are consistent with observations
      • With Langmuir circulations energetics and transport are nonlocal
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      Mechanisms for variable North Atlantic–Nordic seas exchanges

      A. B. Sandø, J. E. Ø. Nilsen, T. Eldevik and M. Bentsen

      Version of Record online: 8 DEC 2012 | DOI: 10.1029/2012JC008177

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      Key Points

      • Increased FSC inflow is associated with decreased FSC overflow
      • Antiphase is associated with a vertical displacement of the ispycnal between them
      • Variability is shown to be barotropic but is also influenced by baroclinic processes
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      Origin, formation and variability of the Subpolar Mode Water located over the Reykjanes Ridge

      E. de Boisséson, V. Thierry, H. Mercier, G. Caniaux and D. Desbruyères

      Version of Record online: 8 DEC 2012 | DOI: 10.1029/2011JC007519

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      Key Points

      • Reykjanes Ridge Mode Water (RRMW) is fed by subtropical and subpolar waters
      • RRMW acquires its properties in the winter mixed layer in the Iceland Basin
      • Changes in the subtropical relative contribution dominate the RRMW variability
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      Hindcasting the Adriatic Sea near-surface motions with a coupled wave-current model

      M. Dutour Sikirić, A. Roland, I. Tomaz˘ić and I. Janeković

      Version of Record online: 8 DEC 2012 | DOI: 10.1029/2012JC007950

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      Key Points

      • We couple the Wind Wave model with the Regional Ocean Modeling System
      • We use recent wave-coupling and surface stress rules to close momentum balance
      • The model is tested in the Adriatic with ADCP and wind measurements
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      Variability of the Denmark Strait overflow: Moored time series from 1996–2011

      Kerstin Jochumsen, Detlef Quadfasel, Heðinn Valdimarsson and Steingrímur Jónsson

      Version of Record online: 7 DEC 2012 | DOI: 10.1029/2012JC008244

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      Key Points

      • The Denmark Strait overflow transport from observations (1996 - 2011) is 3.4 Sv
      • No significant trend in the time series can be detected
      • In recent years the temperature time series of the overflow revealed a cooling
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      Satellite-based detection and monitoring of phytoplankton blooms along the Oregon coast

      S. M. McKibben, P. G. Strutton, D. G. Foley, T. D. Peterson and A. E. White

      Version of Record online: 7 DEC 2012 | DOI: 10.1029/2012JC008114

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      Key Points

      • Bloom products remotely detect bloom onset and advection off the Oregon coast
      • Coincident in situ and satellite data describe causal factors of bloom signals
      • Our methods are applicable in regions with sufficient satellite coverage
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      Statistical characterization of short wind waves from stereo images of the sea surface

      A. S. Mironov, M. V. Yurovskaya, V. A. Dulov, D. Hauser and C. A. Guérin

      Version of Record online: 7 DEC 2012 | DOI: 10.1029/2011JC007860

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      Key Points

      • Statistical analysis was performed for stereo-reconstructed sea surfaces
      • New methodology proposed for analysis of stereo-recovered sea elevations data set
      • Field estimates for slopes, spectrum, and structure functions are presented
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      Density stratification in an estuary with complex geometry: Driving processes and relationship to hypoxia on monthly to inter-annual timescales

      Daniel L. Codiga

      Version of Record online: 7 DEC 2012 | DOI: 10.1029/2012JC008473

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      Key Points

      • Large-scale density structure unexpectedly uniform despite complex geometry
      • Inter-annual variations, linked to hypoxia: runoff-driven, insensitive to wind
      • Long-term trends controlled by climate-driven runoff increases not warming
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      Selecting a first-guess sea surface temperature field as input to forward radiative transfer models

      Korak Saha, Alexander Ignatov, Xing Ming Liang and Prasanjit Dash

      Version of Record online: 1 DEC 2012 | DOI: 10.1029/2012JC008384

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      Key Points

      • Selection of first-guess SST for a forward radiative transfer model

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