@article {Kimball2014,
	title = {{Oxygen and carbon isotope fractionation in calcitic deep-sea corals: Implications for paleotemperature reconstruction}},
	journal = {Chemical Geology},
	volume = {381},
	year = {2014},
	pages = {223{\textendash}233},
	abstract = {Inhabiting areas of the ocean where paleoenvironmental records are sparse, deep-sea corals represent valuable yet largely untapped Holocene records of intermediate and deep ocean variability. $δ$18O and $δ$13C were analyzed in nine live-collected deep-sea gorgonian corals (Isididae and Coralliidae) in order to further develop the {\textquotedblleft}lines{\textquotedblright} paleotemperature method. Least squares linear regression analysis for full lifespan $δ$18O vs. $δ$13C (corrected for $δ$18Owater and $δ$13CDIC) was utilized to yield equations of the form y = mx + b. $δ$18O and intercept values were found to be a function of temperature, and to approximate calcite $δ$18O equilibrium. The corals in this study extend the previously reported calibration (Hill et al., 2011) over a broader range of temperatures from 5 {\textdegree}C to 11.2 {\textdegree}C. When combined with the data from Hill et al. (2011), a new expression for the relationship between the $δ$18Ointercept value and temperature is proposed: T ({\textdegree}C) = -4.12 {\textpm} 0.38 ($δ$18Ointercept) + 12.32 {\textpm} 0.75(R2 = 0.90, p value {\textless} 0.0001) Error estimates are {\textpm} 0.7 {\textdegree}C for corals living at cold temperatures (2 {\textdegree}C), {\textpm} 1.4 {\textdegree}C in warmer waters (11 {\textdegree}C), and {\textpm} 0.5 {\textdegree}C at the mean water temperature of the data set (4.6 {\textdegree}C). The first multi-specimen verification of the {\textquotedblleft}lines{\textquotedblright} method was performed on three co-located bamboo (Isididae) corals and found to give nearly coincident $δ$18O intercepts. Detailed intraspecimen sampling reveals $δ$18O and $δ$13C isotopic variability within coeval portions of the skeleton. In one specimen, {\textquotedblleft}lines{\textquotedblright} method analysis was utilized on multiple samples taken from the same temporal increment of the skeleton, yielding multiple $δ$18O intercepts. Calculated temperatures using the calibration proposed here describe a temperature range of 7.9 to 10.3 {\textdegree}C, which approaches the temperature range of 11.1 {\textpm} 0.7 {\textdegree}C at the coral collection location.},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0009-2541},
	doi = {10.1016/j.chemgeo.2014.05.008},
	url = {http://www.sciencedirect.com/science/article/pii/S0009254114002460},
	author = {Kimball, J B and Dunbar, R B and Guilderson, T P}
}
