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Conference on Physical and Mathematical Modeling of Earth and Environment Processes

PMMEEP 2017: Physical and Mathematical Modeling of Earth and Environment Processes pp 125–137Cite as

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

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Abstract

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.

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Acknowledgments

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

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Authors and Affiliations

  1. Faculty of Physics, M.V. Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russia

    N. A. Diansky

  2. Institute of Numerical Mathematics of the RAS, Gubkina street., 8, Moscow, 119333, Russia

    N. A. Diansky

  3. N.N. Zubov State Oceanographic Institute, Kropotkinsky Lane, 6, Moscow, 119034, Russia

    N. A. Diansky

  4. Institute of Natural and Technical Systems, Lenina street, 28, Sevastopol, 299011, Russia

    P. A. Sukhonos

Authors
  1. N. A. Diansky
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  2. P. A. Sukhonos
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Correspondence to N. A. Diansky .

Editor information

Editors and Affiliations

  1. Institute for Problems in Mechanics of the Russian Academy of Sciences (IPMech RAS), Moscow, Russia

    Vladimir Karev

  2. Institute for Problems in Mechanics of the Russian Academy of Sciences (IPMech RAS), Moscow, Russia

    Dmitry Klimov

  3. Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia

    Konstantin Pokazeev

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Diansky, N.A., Sukhonos, P.A. (2018). Multidecadal Variability of Hydro-Thermodynamic Characteristics and Heat Fluxes in North Atlantic. In: Karev, V., Klimov, D., Pokazeev, K. (eds) Physical and Mathematical Modeling of Earth and Environment Processes. PMMEEP 2017. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-319-77788-7_14

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