1. NOAA Pacific Marine Environmental Laboratory; 7600 Sand Point Way NE, Seattle Washington 98115 USA
2. Marine Science Institute; University of Texas at Austin; 750 Channel View Drive, Port Aransas Texas 78373 USA
3. Department of Geosciences; University of Tulsa; 600 South College Avenue, Tulsa Oklahoma 74104 USA
4. Department of Marine Chemistry and Geochemistry; Woods Hole Oceanographic Institution; Woods Hole Massachusetts 02543 USA
5. Department of Geology and Geophysics; Woods Hole Oceanographic Institution; Woods Hole Massachusetts 02543 USA
6. Max-Plank-Institut für Chemie; Postfach 3060 55020 Mainz Germany
7. Department of Earth and Atmospheric Sciences; University of Alberta; 1-26 Earth Sciences Building, Edmonton, Alberta Canada
8. Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts 02138 USA