TY - JOUR
T1 - Calibration of Sclerosponge Oxygen Isotope Records to Temperature using High-resolution δsup18/supO Data
AU - Rosenheim, Brad E.
AU - Swart, Peter K.
AU - Willenz, Philippe
PY - 2009/1/1
Y1 - 2009/1/1
N2 - A revised calibration is presented relating the oxygen isotope composition of the aragonite-secreting sclerosponge Ceratoporella nicholsoni , oxygen isotope composition of seawater, and ambient water temperature. This new relationship has been obtained using high-resolution δ 18 O data measured in sclerosponges from the Bahamas and Jamaica compared to ambient temperature measurements and δ 18 O values of seawater from the two locations, both measured and published. New data improve an existing calibration which was determined using measurements of salinity rather than directly measured δ 18 O values of the seawater and was composed of measurements from different species of sclerosponge and other aragonite-secreting organisms. The updated calibration ( n = 12, r 2 = 0.95) is: T(°C)=16.1(±3.1)-[6.5(±1.1)](δarag-δsw),">T(°C)=16.1(±3.1)-[6.5(±1.1)](δarag-δsw), where T is temperature in degrees Celsius, δ arag is the δ 18 O value of aragonite normalized to VPDB, and δ sw is the δ 18 O value of water normalized to VSMOW. This calibration improves accuracy and precision of Caribbean sclerosponges for reconstructions of temperature as well as δ 18 O values of seawater.
AB - A revised calibration is presented relating the oxygen isotope composition of the aragonite-secreting sclerosponge Ceratoporella nicholsoni , oxygen isotope composition of seawater, and ambient water temperature. This new relationship has been obtained using high-resolution δ 18 O data measured in sclerosponges from the Bahamas and Jamaica compared to ambient temperature measurements and δ 18 O values of seawater from the two locations, both measured and published. New data improve an existing calibration which was determined using measurements of salinity rather than directly measured δ 18 O values of the seawater and was composed of measurements from different species of sclerosponge and other aragonite-secreting organisms. The updated calibration ( n = 12, r 2 = 0.95) is: T(°C)=16.1(±3.1)-[6.5(±1.1)](δarag-δsw),">T(°C)=16.1(±3.1)-[6.5(±1.1)](δarag-δsw), where T is temperature in degrees Celsius, δ arag is the δ 18 O value of aragonite normalized to VPDB, and δ sw is the δ 18 O value of water normalized to VSMOW. This calibration improves accuracy and precision of Caribbean sclerosponges for reconstructions of temperature as well as δ 18 O values of seawater.
UR - https://digitalcommons.usf.edu/msc_facpub/2453
UR - https://doi.org/10.1016/j.gca.2009.05.047
U2 - 10.1016/j.gca.2009.05.047
DO - 10.1016/j.gca.2009.05.047
M3 - Article
VL - 73
JO - Geochimica et Cosmochimica Acta
JF - Geochimica et Cosmochimica Acta
ER -