A Holocene trace chemistry record from law dome ice cores ...

• Main Author: Plummer, Christopher
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; East Antarctica; Law Dome; Antarc*; Antarctica; ice core
• Online Access: https://dx.doi.org/10.25959/23237972; https://figshare.utas.edu.au/articles/thesis/A_Holocene_trace_chemistry_record_from_law_dome_ice_cores/23237972

The short instrumental period from the Southern Hemisphere presents challenges to assessing long term variability in the climate system. Proxy records developed from ice core data provide an opportunity to address this issue. Following new analysis of ice cores from the high snowfall Dome Summit South (DSS), Law Dome, East Antarctica, the full Holocene chemistry records of sea salts, sulphate and methanesulphonic acid (MSA) from this site are presented for the first time. The records have been annually layer counted to 333 BCE +13/-7 years; comparable or better than the presently available, sub-annual resolution Antarctic ice core records covering 2,000 years. The annually dated record has been used to construct proxy records of El Nino-Southern Oscillation, Australian drought, and improve the accumulation record for the site. The detailed volcanic history from DSS has been used to refine the timing of the Kuwae (Vanuatu) eruption to between 1456 and 1458 CE. This eruption is one of the largest of the past ...