@article{PAR00004584,
  title = {{E}vidence for tropical {S}outh {P}acific climate change during the {Y}ounger {D}ryas and the {B}olling-{A}llerod from geochemical records of fossil {T}ahiti corals},
  author = {{A}sami, {R}. and {F}elis, {T}. and {D}eschamps, {P}ierre and {H}anawa, {K}. and {I}ryu, {Y}. and {B}ard, {E}. and {D}urand, {N}. and {M}urayama, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e present monthly resolved records of strontium/calcium ({S}r/{C}a) and oxygen isotope (delta {O}-18) ratios from well-preserved fossil corals drilled during the {I}ntegrated {O}cean {D}rilling {P}rogram ({IODP}) {E}xpedition 310 "{T}ahiti {S}ea {L}evel" and reconstruct sea surface conditions in the central tropical {S}outh {P}acific {O}cean during two time windows of the last deglaciation. {T}he two {T}ahiti corals examined here are uranium/thorium ({U}/{T}h)-dated at 12.4 and 14.2 ka, which correspond to the {Y}ounger {D}ryas ({YD}) cold reversal and the {B}olling-{A}llerod ({B}-{A}) warming of the {N}orthern {H}emisphere, respectively. {T}he coral {S}r/{C}a records indicate that annual average sea surface temperature ({SST}) was 2.6-3.1 degrees {C} lower at 12.4 ka and 1.0-1.6 degrees {C} lower at 14.2 ka relative to the present, with no significant changes in the amplitude of the seasonal {SST} cycle. {T}hese cooler conditions were accompanied by seawater delta {O}-18(delta {O}-18(sw)) values higher by similar to 0.8 parts per thousand and similar to 0.6 parts per thousand relative to the present at 12.4 and 14.2 ka, respectively, implying more saline conditions in the surface waters. {A}long with previously published coral {S}r/{C}a records from the island [{C}ohen and {H}art (2004), {D}eglacial sea surface temperatures of the western tropical {P}acific: {A} new look at old coral. {P}aleoceanography 19, {PA}4031, doi:10.1029/2004{PA}001 084], our new {T}ahiti coral records suggest that a shift toward lower {SST} by similar to 1.5 degrees {C} occurred from 13.1 to 12.4 ka, which was probably associated with a shift toward higher delta {O}-18, by similar to 0.2 parts per thousand. {A}long with a previously published coral {S}r/{C}a record from {V}anuatu [{C}orrege et al. (2004), {I}nterdecadal variation in the extent of {S}outh {P}acific tropical waters during the {Y}ounger {D}yras event. {N}ature 428, 927-929], the {T}ahiti coral records provide new evidence for a pronounced cooling of the western to central tropical {S}outh {P}acific during the {N}orthern {H}emisphere {YD} event.},
  keywords = {{IODP} {E}xpedition 310 "{T}ahiti {S}ea {L}evel" ; fossil coral ; {S}r/{C}a paleothermometer ; last deglaciation ; {Y}ounger {D}ryas period ; {B}olling-{A}llerod warming ; {DP} {H}unter},
  booktitle = {},
  journal = {{E}arth and {P}lanetary {S}cience {L}etters},
  volume = {288},
  numero = {1-2},
  pages = {96--107},
  ISSN = {0012-821{X}},
  year = {2009},
  DOI = {10.1016/j.epsl.2009.09.011},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00004584},
}