1. Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, New York 14853
2. National Center for Atmospheric Research, Boulder, Colorado 80307;
3. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, 05508-900 SP, Brazil;
4. Department of Geological Science and Marine Science Program, University of South Carolina, Columbia, South Carolina 29208;
5. Laboratoire d'Océanographie de Villefranche, UMR 7093, BP 8-06238 Villefranche-sur-mer Cedex, France;
6. Trinity Consultants, Irvine, California 92618;
7. Department of Earth and Planetary Sciences, University of California, Santa Cruz, California 95064;
8. Australian Nuclear Science and Technology Organisation, Menai, 2234 NSW, Australia;
9. Laboratoire des Sciences du Climat et de l'Environnement, UMR 1572 CEA-CNRS-UVSQ, CEA Saclay, Gif-Sur-Yvette, France;
10. Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR 7583 CNRS-UP12-UP7, University of Paris 12, Créteil, France;
11. Israel Oceanographic and Limnological Research, National Institute of Oceanography, Haifa, Israel;
12. Department of Chemistry, Central Washington University, Ellensburg, Washington 98926;
13. Institute of Marine Sciences, Middle East Technical University, P.K. 28, Erdemli, Turkey;
14. Department of Analytical Chemistry, Institute for Nuclear Sciences, Ghent University, B-9000 Ghent, Belgium;
15. Institute for Marine Sciences, University of California, Santa Cruz, California 95064;
16. Rosenstiel School of Marine and Atmospheric Science, Marine and Atmospheric Chemistry, University of Miami, Miami, Florida 33149;
17. Chemistry Department, U.S. Naval Academy, Annapolis, Maryland 21402