Abstract
We present a new reconstruction of surface air temperature and sea surface temperature for the Last Glacial Maximum. The method blends model fields and sparse proxy-based point estimates through a data assimilation approach. Our reconstruction updates that of Annan and Hargreaves (2013), using improved models, data and methodology and our reconstruction has a global annual mean surface air temperature anomaly of −4.5 ± 0.9 °C relative to the pre-industrial climate. This is slightly colder than our previous estimate, with an upwards revision on its uncertainty due to methodological assumptions. It is, however, substantially less cold than the recent reconstruction of Tierney et al. (2020). We discuss the reasons for this discrepancy.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
