The Carbon Group at NOAA’s Pacific Marine Environmental Laboratory (PMEL) works to advance our scientific understanding of the ocean carbon cycle and how it is changing over time. PMEL’s research includes documenting the evolving state of the ocean carbon chemistry with high quality measurements on ships and autonomous platforms, studying the ocean’s role in the global carbon cycle and the processes involved, and investigating how rising atmospheric CO2 and climate change affect the chemistry of the ocean and its marine ecosystems.