Fig. 5 | Nature Communications

Fig. 5

From: Coral carbon isotope sensitivity to growth rate and water depth with paleo-sea level implications

Fig. 5

Coral skeletal δ13C to water depth comparison: mean coral δ13C compared against water depth at top of coral for different locations and coral genera based on our own records and a literature search compilation. Most sites are in the Pacific. Those corals that are not Porites are indicated in legend. Where possible, mean coral δ13C was calculated over the period from 1900 to 1950 to avoid the interval of most pronounced 13C Suess effect because the magnitude of the 13C Suess effect varies with region. Sites with shorter records after 1950 are indicated with numbers (1 = Clipperton 1990–1994; 2 = Clipperton Pavona (1946–1958); 3 = Papua New Guinea Isopora (1970s); 4 = Heron Is. Isopora (2008–2012); 5 = Barbados Montastrea (1976–1978)). The black open cross numbered 6 is a Fiji Diploastrea. Despite the different coral genera and wide spatial array of sites, the results indicate a decrease in coral δ13C with growth position water depth of ~1.4‰ per 5 m of depth (R = 0.67, p < 0.01) (see Supplementary Fig. 1). If all the corals with δ13C data younger than 1950 are removed the relationship is −1.5‰ per 5 m of depth (R = 0.60, p < 0.01) (see Supplementary Fig. 2). Source data are provided as a Source Data file in the Supplement. References for coral δ13C data are also included in the supplement

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