NOAA Pacific Marine Environmental Laboratory (PMEL) maintains a network of moored buoys for monitoring ocean acidification. These buoys measure concentrations of carbon dioxide (CO2) in the air and water near the ocean surface in order to evaluate variability in air-sea CO2 fluxes. Other parameters such as sea level pressure, pH, water temperature, and salinity are measured at some sites. Time-series records are essential for characterizing the natural variability and secular trends in the ocean carbon cycle and for determining the physical and biological mechanisms controlling the system. Data are distributed through NOAA's Pacific Marine Environmental Laboratory (PMEL) Carbon Program.

caution: These data have not been post-calibrated or quality controlled. For scientific usage, please access the quality controlled data at http://cdiac.orn

time period: current; updates every 3 hours.