ai d i e

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2002
• Subjects: biomass eigen-frequency; long-term biomass cycles; wavelet analysis; 18.6- years lunar cycle; Arctic; Barents Sea; Arctic cod; Northeast Arctic cod
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.572.2273; http://ansatte.hials.no/hy/doc/JIces2003_01Code.pdf

recruitment of Barents Sea capelin, Norwegian spring-spawning herring, and Northeast Arctic cod has adopted an optimal recruitment cycle close to the stationary 6.2 years Kola temperature cycle. Long-term biomass growth is correlated to the phase relation between the biomass eigen-frequency cycle and the Kola temperature cycles. The biomasses of capelin, herring and cod have long-term growth when the 6.2 and 18.6 years Kola temperature cycles are positive at the same time. There is a long-term biomass reduction when the temperature cycles are not positive at the same time, and a biomass collapse when the temperature cycles are negative at the same time. The deterministic property of the 18.6 years lunar-nodal tide provides a new way of long-term biomass forecasting over periods of 50e80 years or more.