1. LODYC, UMR 121 CNRS/ORSTOM/UPMC, Paris, France;
2. NOAA/PMEL, Seattle, USA;
3. Geochemical Laboratory/Meteorological Research Institute, Tsukuba, Japan;
4. Plymouth Marine Laboratory, Plymouth, UK;
5. LPCM, URA CNRS/UPMC, Paris, France;
6. NOAA/AOML, Miami, USA