@article{fdi:010037854,
  title = {{R}econstruction of seasonal temperature variability in the tropical {P}acific {O}cean from the shell of the scallop, {C}omptopallium radula},
  author = {{T}h{\'e}bault, {J}ulien and {C}hauvaud, {L}. and {C}lavier, {J}. and {G}uarini, {J}. and {D}unbar, {R}. {B}. and {F}ichez, {R}enaud and {M}ucciarone, {D}. {A}. and {M}orize, {E}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigated the oxygen isotope composition (delta {O}-18) of shell striae from juvenile {C}omptopallium radula ({M}ollusca; {P}ectinidae) specimens collected live in {N}ew {C}aledonia. {B}ottom-water temperature and salinity were monitored in-situ throughout the study period. {E}xternal shell striae form with a 2-day periodicity in this scallop, making it possible to estimate the date of precipitation for each calcite sample collected along a growth transect. {T}he oxygen isotope composition of shell calcite (delta {O}-18(shell calcite)) measured at almost weekly resolution on calcite accreted between {A}ugust 2002 and {J}uly 2003 accurately tracks bottom-water temperatures. {A} new empirical paleo-temperature equation for this scallop species relates temperature and delta {O}-18(shell calcite). t(degrees {C}) = 20.00(+/- 0.61) - 3.66(+/- 0.39) x (delta {O}-18(shell calcite {VPDB}) - delta {O}-18(water {VSMOW})) {T}he mean absolute accuracy of temperature estimated using this equation is 1.0 degrees {C} at temperatures between 20 and 30 degrees {C}. {U}ncertainties regarding the precise timing of {C}a{CO}3 deposition and the actual variations in delta {O}-18(water) at our study sites probably contribute to this error. {C}omparison with a previously published empirical paleotemperature equation indicates that {C}. radula calcite is enriched in {O}-18 by similar to 0.7 parts per thousand relative to equilibrium. {G}iven the direction of this offset and the lack of correlation between shell growth rate and delta {O}-18(shell) calcite, this disequilibrium is unlikely to be related to kinetic isotope effects. {W}e suggest that this enrichment reflects (1) a relatively low p{H} in the scallop's marginal extrapallial fluid ({EPF}), (2) an isotopic signature of the {EPF} different from that of seawater, or (3) {R}ayleigh fractionation during the biocalcification process. {R}elative changes in delta {O}-18 shell calcite reflect seawater temperature variability at this location and we suggest that the shell of {C} radula may be useful as an archive of past seawater temperatures.},
  keywords = {},
  booktitle = {},
  journal = {{G}eochimica et {C}osmochimica {A}cta},
  volume = {71},
  numero = {4},
  pages = {918--928},
  ISSN = {0016-7037},
  year = {2007},
  DOI = {10.1016/j.gca.2006.10.017},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037854},
}