Earth nutation influence on system dynamics of Northeast Arctic cod

• Published in: ICES Journal of Marine Science
• Main Author: Yndestad, H.
• Format: Text
• Language: English
• Published: Oxford University Press 1999
• Subjects: Articles; Arctic; Barents Sea; Arctic cod; Northeast Arctic cod
• Online Access: http://icesjms.oxfordjournals.org/cgi/content/short/56/5/652; https://doi.org/10.1006/jmsc.1999.0491

This paper reports a correlation between the time series of Northeast Arctic cod population estimates and the Earth's nutation of 18.6 years. In the Barents Sea harmonic temperature cycles of 3*18.6=55.8 years, 18.6 years, and 18.6/3=6.2 years are correlated to the growth rate of cod and will cause long-term biomass fluctuations. Harmonic temperature cycles of 18.6/3=6.2 years cycle are correlated exponentially to time series of the recruitment cycles of cod. The influence of the Earth's nutation is explained by a General Systems theory where temperature cycles are a forced oscillator on the biological system in the Barents Sea. The system dynamics of the cod biomass are synchronized to the temperature cycle and amplified by a biological stochastic resonance to the supply of food.