The SISAL WG is a community-effort to compile the many hundreds of speleothem isotopic records worldwide, with careful screening, construction of standardised age models, and documentation of measurement and age-model uncertainties. SISAL will produce a public-access database and publications to document this, and make use of the database to analyse past changes in climate and atmospheric circulation.
A major motivation for creating the database is to provide a tool to evaluate state-of-the-art climate models that explicitly simulate water and carbon isotopes and/or atmospheric tracers. Several modeling groups running paleoclimate simulations during the current phase of the Coupled Model Intercomparison Project (CMIP6/PMIP4) are using isotope- and tracer- enabled models. We will discuss the use of speleothem data for model evaluation at the SISAL WG kick-off meeting in June.
We have made substantial progress on the SISAL database and data collection since last December and we confidently expect to produce a first version of the database (ca 150 records) by Northern Hemisphere autumn 2017, making it timely to hold a second workshop aligned with the PMIP meeting (September 2017) to design data-model comparisons that SISAL will carry out before the 2018 workshop.