- British Antarctic Survey
- High Cross
- CAMBRIDGE
- UK
- +44 (0)1223 221662
Louise Sime
For the past four years, I have worked at the British Antarctic Survey in the ice cores group as a paleoclimate modeller. My main interest is the interpretation of stable water isotopes: deuterium and oxygen-18 in ice records. Most of my work is currently with an isotope enabled (deuterium and oxygen-18 tracking) version of HadAM3 (the Hadley Centre unified model ver4.5). The isotope code was written by Julia Tindall in conjunction with Paul Valdes at Bristol University.
We recently used the isotope enable HadAM3 model to at Evidence for Warmer interglacial in East Antarctic Ice Cores (published in Nature). The results presented suggest that there is a Kink in the Paleothermometer. This builds on some earlier work examining how warm climate might be recorded in Antarctic ice cores. I have also looked at the relationship between temperature and condensation temperature across the Antarctic Peninsula using ECMWF reanalysis data. This provides an initial indication of how temperature changes may be recorded in isotopes over annually resolved ice cores recovered from this region. It would be nice to able to follow up on this with further high resolution region modelling of this topographically complex region.
In addition to stable water isotopes, the BAS ice coring group is interested in the interpretation of sea salt proxies in ice cores. To this end, I have been involved with examining Southern Ocean wind conditions during past cold climates (e.g. The Southern Hemisphere at glacial terminations: insights from the Dome C ice core). We have also just submitted a paper to Science examining Southern Hemisphere Westerlies during the Last Glacial Maximum. If you are interested, please contact me for a copy of this paper.
My other interested include automated processing of ice-radar radar data. I will fill in some more details about this once the method is finalised.
Contact me at lsim@[remove]bas.ac.uk