Multidecadal Variability of Hydro-Thermodynamic Characteristics and Heat Fluxes in North Atlantic

  • N. A. Diansky
  • P. A. Sukhonos
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)


The article describes a manifestation of Atlantic multidecadal oscillation (AMO) in the variability of hydro-thermodynamic characteristics and ocean surface heat fluxes in North Atlantic. It is shown that multidecadal changes in the upper mixed layer temperature and mixed layer depth, as well as sea surface height (SSH), are statistically significant and show physically consistent changes. Convective mixing of waters at high latitudes is stronger for negative AMO phase with an exception the case of Great Salinity Anomaly. Large-scale fluctuations in SSH are most pronounced in the eastern part of North Atlantic. Multidecadal changes in the net surface heat fluxes and horizontal heat advection are coherent. The increase (decrease) of horizontal heat advection in the negative (positive) AMO phase leads to an increase (decrease) of the ocean heat release to the atmosphere. Multidecadal variability of the horizontal heat advection is due to changes in the dynamics of currents, rather than temperature gradients.


Atlantic multidecadal oscillation Variability North Atlantic 



This study was partially supported by the Russian Scientific Foundation, grant 17-17-01295


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Faculty of PhysicsM.V. Lomonosov Moscow State UniversityMoscowRussia
  2. 2.Institute of Numerical Mathematics of the RASMoscowRussia
  3. 3.N.N. Zubov State Oceanographic InstituteMoscowRussia
  4. 4.Institute of Natural and Technical SystemsSevastopolRussia

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