Deborah K Steinberg¹, Karen Stamieszkin², Amy E Maas³, Colleen A Durkin⁴, Uta Passow⁵, Margaret L Estapa⁶, Ken Buesseler⁷, Montserrat Roca-Marti⁷ and Melissa Omand⁸, (1)Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, United States, (2)Virginia Institute of Marine Science, Gloucester Point, United States, (3)Bermuda Institute of Ocean Sciences, St. George's, Bermuda, (4)Moss Landing Marine Laboratories, Moss Landing, CA, United States, (5)Memorial University of Newfoundland, St John's, NF, Canada, (6)Skidmore College, Saratoga Springs, NY, United States, (7)Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (8)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States