[1] Low-oxygen and low-pH events are an increasing concern and threat in the Eastern Pacific
 coastal waters, and can be lethal for benthic and demersal organisms on the continental
 shelf. The normal seasonal cycle includes uplifting of isopycnals during upwelling in spring, which
 brings low-oxygen and low-pH water onto the shelf. Five years of continuous observations of
 subsurface dissolved oxygen off Southern California, reveal large additional oxygen deficiencies
 relative to the seasonal cycle during the latest La Niña event. While some changes in  ...