Today's seminar - 13 October at 13:00 UTC
Thomas Felis and Hussein Sayani will present "Tropical ocean hydroclimate and temperature from coral archives".
Shallow-water corals provide annual to subannual -resolution climate reconstructions from the data-scarce tropical to subtropical oceans, enabling to extend the modern-day observational records back to the preindustrial era, contextualize anthropogenic climate change, and improve the skill of future climate projections. Coral-based reconstructions utilize oxygen isotope ratios that track the combined change in sea surface temperature (SST) and the oxygen isotopic composition of seawater, and strontium-to-calcium ratios (Sr/Ca) that primarily track SST variability. Paired coral oxygen isotope and Sr/Ca records can be combined to isolate the oxygen isotopic composition of seawater, which like salinity reflects changes in the hydrologic budget. These paired proxy records are becoming increasingly available from modern corals covering the last centuries, and are still rare for time intervals of the Holocene, the last interglacial, and especially the last glacial, based on fossil corals.
We will provide an overview of the application of paired coral oxygen isotope and Sr/Ca records for climate reconstructions on different time scales (seasonal, interannual, decadal) from the last interglacial to the Anthropocene. We will then provide an overview of the ongoing activities of the PAGES CoralHydro2k project. The PAGES CoralHydro2k team has compiled a comprehensive, machine-readable, and metadata-rich network of paired coral oxygen isotope and Sr/Ca records to help facilitate tropical marine hydroclimate and temperature reconstructions across recent centuries. Here we describe the structure and spatiotemporal characteristics of this new database and outline a crowdsourced data-submission process to ensure active-curation of records and future updates.
How to join
Zoom (no registration required): https://unibe-ch.zoom.us/j/67991298929?pwd=NFNBQXh6aUM0Z3RhUlpSdG9WZjFBdz09
Meeting ID: 679 9129 8929
Past seminars (and recordings)
To find out more about past seminars and/or to watch the recordings, please visit the 2k Network seminar series web page here.
Questions can be emailed to Sarah Eggleston: email@example.com