Brendan Carter, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Siv Lauvset, Uni Research, Uni Climate, Bergen, Norway, Richard A Feely, NOAA PMEL, Seattle, WA, United States, Are Olsen, University of Bergen, Geophysical Institute, Bergen, Norway, Timothy DeVries, University of California, Santa Barabara, Earth Research Institute and Department of Geography, Santa Barabara, United States and Rolf E Sonnerup, University of Washington, Joint Institute for the Study of the Atmosphere and Ocean, Seattle, WA, United States