Resonant Forcing of the Climate System in Subharmonic Modes
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J. Mar. Sci. Eng. 2020, 8(1), 60; https://doi.org/10.3390/jmse8010060
Received: 28 December 2019 / Revised: 15 January 2020 / Accepted: 16 January 2020 / Published: 20 January 2020
(This article belongs to the Section Physical Oceanography)
During recent decades observation of climate archives has raised several questions. Concerning the mid-Pleistocene transition problem, conflicting sets of hypotheses highlight either the role of ice sheets or atmospheric carbon dioxide in causing the increase in duration and severity of ice age cycles. The role of the solar irradiance modulations in climate variability is frequently referenced but the underlying physical justifications remain most mysterious. Here, we extend the key mechanisms involving the oceanic Rossby waves in climate variability, to very long-period, multi-frequency Rossby waves winding around the subtropical gyres. Our study demonstrates that the climate system responds resonantly to solar and orbital forcing in eleven subharmonic modes. We advocate new hypotheses on the evolution of the past climate, implicating the deviation between forcing periods and natural periods according to the subharmonic modes, and the polar ice caps while challenging the role of the thermohaline circulation.
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MDPI and ACS Style
Pinault, J.-L. Resonant Forcing of the Climate System in Subharmonic Modes. J. Mar. Sci. Eng. 2020, 8, 60. https://doi.org/10.3390/jmse8010060
AMA Style
Pinault J-L. Resonant Forcing of the Climate System in Subharmonic Modes. Journal of Marine Science and Engineering. 2020; 8(1):60. https://doi.org/10.3390/jmse8010060
Chicago/Turabian StylePinault, Jean-Louis. 2020. "Resonant Forcing of the Climate System in Subharmonic Modes" J. Mar. Sci. Eng. 8, no. 1: 60. https://doi.org/10.3390/jmse8010060
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