In:
Earth System Science Data, Copernicus GmbH, Vol. 12, No. 4 ( 2020-10-27), p. 2579-2606
Abstract:
Abstract. Characterizing the temporal uncertainty in palaeoclimate records is
crucial for analysing past climate change, correlating climate
events between records, assessing climate periodicities,
identifying potential triggers and evaluating climate model
simulations. The first global compilation of speleothem isotope
records by the SISAL (Speleothem Isotope Synthesis and Analysis)
working group showed that age model uncertainties are not
systematically reported in the published literature, and these are only
available for a limited number of records (ca. 15 %, n=107/691). To improve the usefulness of the SISAL database, we have
(i) improved the database's spatio-temporal coverage and (ii) created
new chronologies using seven different approaches for age–depth
modelling. We have applied these alternative chronologies to the
records from the first version of the SISAL database (SISALv1) and to
new records compiled since the release of SISALv1. This paper
documents the necessary changes in the structure of the SISAL database
to accommodate the inclusion of the new age models and their
uncertainties as well as the expansion of the database to include new
records and the quality-control measures applied. This paper also
documents the age–depth model approaches used to calculate the new
chronologies. The updated version of the SISAL database (SISALv2)
contains isotopic data from 691 speleothem records from 294 cave sites
and new age–depth models, including age–depth temporal uncertainties
for 512 speleothems. SISALv2 is available at https://doi.org/10.17864/1947.256
(Comas-Bru et al., 2020a).
Type of Medium:
Online Resource
ISSN:
1866-3516
DOI:
10.5194/essd-12-2579-2020
DOI:
10.5194/essd-12-2579-2020-supplement
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2020
detail.hit.zdb_id:
2475469-9
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