Colleen A Durkin, Moss Landing Marine Laboratories, Moss Landing, CA, United States, Alyson Santoro, University of California Santa Barbara, Santa Barbara, United States, Ken Buesseler, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Ivona Cetinic, NASA Goddard Space Flight Cent, Greenbelt, MD, United States, Margaret L Estapa, Skidmore College, Saratoga Springs, NY, United States and Melissa Omand, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States