Aubert A. auteur aut IRD Lazareth Claire E. auteur aut IRD Cabioch Guy auteur aut IRD Boucher Hugues auteur aut IRD Yamada T. auteur aut IRD Iryu Y. auteur aut IRD Farman R. auteur aut IRD text journalArticle eng text/pdf born digital access The use of the sclerochronology and geochemistry of a New Caledonian (South West Pacific) giant clam Hippopus hippopus shell as markers of environmental changes has been investigated. Growth increment thickness and delta O-18 ratios were measured on 4 years of shell growth of a modern specimen. During the last year, this giant clam was placed in a tank equipped for high-frequency environmental monitoring. Because shell is secreted in isotopic equilibrium with the seawater, the palaeo-sea surface temperature (SST) equation obtained faithfully reproduces the seasonal SST amplitudes. Growth increment thickness changes are seasonal and, for more than 50%, governed by the SST changes. The transplantation from the in situ site to the tank and reproduction events reduces the strength of growth and SST relationships. Nevertheless, growth increment thickness measurements can give information on average, minimal and maximal past SST in diagenetically altered shells. A peculiar growth event characterized by a short, drastic and significant decrease has been identified and attributed to an intense upwelling event. This study further highlights the use of giant clam shell delta O-18 as a SST proxy but also demonstrates that H. hippopus growth increment thickness changes provide useful information on past environmental settings and on exceptional events, for example, intense upwellings. specialized Tridacnidae delta O-18 Sclerochronology SST New Caledonia Upwelling 064 28 4 989-998 2009 0722-4028 https://www.documentation.ird.fr/hor/fdi:010048310 10.1007/s00338-009-0538-0 0722-4028 [F B010048310] https://www.documentation.ird.fr/hor/fdi:010048310 https://www.documentation.ird.fr/intranet/publi/2009/11/010048310.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-12-03 2018-02-01 fdi:010048310 fre