(Left) A photo of the dominant species of Southern Ocean krill, Euphausia superba, similar to the crustacean zooplankton analyzed by Di Lorenzo and Ohman (4) (Photo courtesy of A. McDonnell, University of Alaska, Fairbanks, AK). (Right) Spectral analysis of results from a linear stochastic model (Eq. 1), where low-frequency responses in ocean physics and biology can be generated by integrating high-frequency atmospheric forcing over time (see text for more details).