The ‘M1’ mooring is located near the mouth of Monterey Bay in roughly 1,000 meters of water, and has been in near-continuous operation since the early 1990s. Sensors on the mooring measure ocean biogeochemical and physical properties over time, including water temperature, salinity, dissolved oxygen, chlorophyll fluorescence, pH, and pCO₂ both in air and just below the surface. A meteorological sensor package provides measurements of wind speed and direction, air temperature, and air pressure.

The data shown here are from Fall 2016 on, and represent a subset of the instruments deployed on M1, focusing on variables pertinent to the study of processes such as ocean acidification, hypoxia, and climate variability and change.