engleski

SISALv2: A comprehensive speleothem isotope database with multiple age-depth models

Characterising the temporal uncertainty in palaeoclimate records is crucial for analysing past climate 3 change, for correlating climate events between records, for assessing climate periodicities, identifying 4 potential triggers, and to evaluate climate model simulations. The first global compilation of speleothem 5 isotope records by the SISAL (Speleothem Isotope Synthesis and Analysis) Working Group showed that 6 age-model uncertainties are not systematically reported in the published literature and these are only 7 available for a limited number of records (ca. 15%, n = 107/691). To improve the usefulness of the SISAL 8 database, we have (i) improved the database’s spatio-temporal coverage and (ii) created new 9 chronologies using seven different approaches for age-depth modelling. We have applied these 10 alternative chronologies to the records from the first version of the SISAL database (SISALv1) and to new 11 records compiled since the release of SISALv1. This paper documents the necessary changes in the 12 structure of the SISAL database to accommodate the inclusion of the new age-models and their 13 uncertainties as well as the expansion of the database to include new records and the quality-control 14 measures applied. This paper also documents the age-depth model approaches used to calculate the new 15 chronologies. The updated version of the SISAL database (SISALv2) contains isotopic data from 691 16 speleothem records from 294 cave sites and new age-depth models, including age-depth temporal 17 uncertainties for 512 speleothems.

cave, speleothem, database, age-depth model

nije evidentirano