Anne Bodel, Moss Landing Marine Laboratories, Moss Landing, United States, Colleen A Durkin, Moss Landing Marine Laboratories, Moss Landing, CA, United States, Ken Buesseler, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, 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