Richard A Feely, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Richard H Wanninkhof, NOAA Atlantic Oceanographic and Meteorological Laboratory, Ocean Chemistry and Ecosystems Division, Miami, FL, United States, Brendan R Carter, University of Washington Seattle, Seattle, United States, Simone R Alin, NOAA PMEL, Seattle, United States, Nina Bednarsek, Oregon State University, Cooperative Institute for Marine Resources Studies, Newport, OR, United States and Liqing Jiang, University of Maryland, Earth System Science Interdisciplinary Center,, College Park, United States