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- Title
Technical note: A new online tool for δ18O–temperature conversions.
- Authors
Gaskell, Daniel E.; Hull, Pincelli M.
- Abstract
The stable-oxygen-isotopic composition of marine carbonates (δ18 O c) is one of the oldest and most widely used paleothermometers. However, interpretation of these data is complicated by the necessity of knowing the δ18 O of the source seawater (δ18 O w) from which CaCO 3 is precipitated. The effect of local hydrography (the "salinity effect") is particularly difficult to correct for and may lead to errors of >10 ∘ C in sea-surface temperatures if neglected. A variety of methods for calculating δ18 O w have been developed in the literature, but not all are readily accessible to workers. Likewise, temperature estimates are sensitive to a range of other calibration choices (such as calibration species and the inclusion or exclusion of carbonate ion effects), which can require significant effort to intercompare. We present an online tool for δ18 O–temperature conversions which provides convenient access to a wide range of calibrations and methods from the literature. Our tool provides a convenient way for workers to examine the effects of alternate calibration and correction procedures on their δ18 O-based temperature estimates.
- Subjects
HYDROGRAPHY; CALIBRATION; SEAWATER; SALINITY; CARBONATES; TEMPERATURE
- Publication
Climate of the Past, 2023, Vol 19, Issue 6, p1265
- ISSN
1814-9324
- Publication type
Article
- DOI
10.5194/cp-19-1265-2023