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Solar forcing synchronizes decadal North Atlantic climate variability

Author

Listed:
  • Rémi Thiéblemont

    (GEOMAR Helmholtz Centre for Ocean Research)

  • Katja Matthes

    (GEOMAR Helmholtz Centre for Ocean Research
    Christian-Albrechts-Universität zu Kiel)

  • Nour-Eddine Omrani

    (Bjerknes Centre and Geophysical Institute, University of Bergen)

  • Kunihiko Kodera

    (Solar-Terrestrial Environment Laboratory, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan)

  • Felicitas Hansen

    (GEOMAR Helmholtz Centre for Ocean Research)

Abstract

Quasi-decadal variability in solar irradiance has been suggested to exert a substantial effect on Earth’s regional climate. In the North Atlantic sector, the 11-year solar signal has been proposed to project onto a pattern resembling the North Atlantic Oscillation (NAO), with a lag of a few years due to ocean-atmosphere interactions. The solar/NAO relationship is, however, highly misrepresented in climate model simulations with realistic observed forcings. In addition, its detection is particularly complicated since NAO quasi-decadal fluctuations can be intrinsically generated by the coupled ocean-atmosphere system. Here we compare two multi-decadal ocean-atmosphere chemistry-climate simulations with and without solar forcing variability. While the experiment including solar variability simulates a 1–2-year lagged solar/NAO relationship, comparison of both experiments suggests that the 11-year solar cycle synchronizes quasi-decadal NAO variability intrinsic to the model. The synchronization is consistent with the downward propagation of the solar signal from the stratosphere to the surface.

Suggested Citation

  • Rémi Thiéblemont & Katja Matthes & Nour-Eddine Omrani & Kunihiko Kodera & Felicitas Hansen, 2015. "Solar forcing synchronizes decadal North Atlantic climate variability," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9268
    DOI: 10.1038/ncomms9268
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    Cited by:

    1. François, B., 2016. "Influence of winter North-Atlantic Oscillation on Climate-Related-Energy penetration in Europe," Renewable Energy, Elsevier, vol. 99(C), pages 602-613.
    2. Hernández, Armand & Sánchez-López, Guiomar & Pla-Rabes, Sergi & Comas-Bru, Laia & Parnell, Andrew & Cahill, Niamh & Geyer, Adelina & Trigo, Ricardo M & Giralt, Santiago, 2019. "A 2,000-year Bayesian NAO reconstruction from the Iberian Peninsula," Earth Arxiv p7ft6, Center for Open Science.

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