On the relationship between interannual baroclinic waves and fish populations in the northeast Pacific

From the cross-spectral analysis of 40–80 years of coastal sea level, sea surface temperature, and salinity data in the Northeast Pacific, we found coherent signals at frequencies of 0.09, 0.17–0.20, 0.33, and 0.43 cycles per year (corresponding to periods of 11, 5–6, 3, and 2.3 years). The strong 5–6 year oscillation, besides appearing in the sea level cross-spectrum, was manifested as a sea level-temperature oscillation near Vancouver Island,...