Richard Carl Zimmerman, Old Dominion University, Ocean, Earth, & Atmospheric Science, Norfolk, VA, United States, Victoria J Hill, Old Dominion Univ, Ocean, Earth, & Atmospheric Science, Norfolk, VA, United States, Matthew Herman Long, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States and David Burdige, Old Dominion University, Norfolk, VA, United States