The Cordell Currents

Photo: Robert Lee A future priority for hypoxia monitoring at Cordell Bank National Marine Sanctuary is maintaining the integrity of a continuous, long-term oxygen dataset. Consistent monitoring over time is essential because hypoxic events can be episodic, seasonal, and influenced by shifting ocean conditions, making short-term observations insufficient to detect meaningful trends. A reliable long-term … Continue reading "The importance of a continuous long-term data set on oxygen status of Cordell Bank’s environment"

Photo: Robert Lee Oxygen levels are a critical component of ocean health, influencing where marine species can live, feed, and migrate. While low-oxygen water naturally occurs in the deep ocean, recent observations along the U.S. West Coast have documented episodes of hypoxic — or low-oxygen — water moving into shallower habitats. In 2013, researchers from … Continue reading "Why we need to study the effects of low-oxygen events at Cordell Bank"

Eastern Boundary Currents and coastal upwelling are fundamental to the extraordinary productivity of the ecosystem surrounding Cordell Bank National Marine Sanctuary. The southward-flowing California Current, one of the world’s major Eastern Boundary Currents, transports cold, nutrient-rich water along the U.S. West Coast. Seasonal upwelling then brings these nutrients from deep ocean layers to the surface, … Continue reading "Why are eastern boundary currents and coastal upwellings so important to Cordell Bank National Marine Sanctuary"

Photo: NOAA/GFNMS/CBNMS The exceptional productivity of Cordell Bank National Marine Sanctuary is driven by a rare combination of oceanographic and geological factors. The bank’s steep rocky topography rises from the continental shelf into nutrient-rich waters influenced by the California Current and seasonal upwelling, concentrating plankton and creating ideal feeding conditions for fishes, invertebrates, seabirds, and … Continue reading "Unique factors contributing to Cordell Bank’s incredible productivity"

Photo: NOAA/GFNMS/CBNMS  Cordell Bank National Marine Sanctuary is one of 18 federally designated underwater areas protected by NOAA’s Office of National Marine Sanctuaries and represents a remarkable offshore ecosystem shaped by migration, ocean currents, and seafloor geography. Located about 42 miles north of San Francisco and spanning 1,286 square miles, the sanctuary centers around Cordell … Continue reading "Migration and Creatures"