Ralph Cicerone, President of NAS, personally reviewed Hansen’s recent article, which is available for free at the PNAS website here.
George Denton, a very distinguished paleoclimatologist of the older school – one whose work will undoubtedly long survive that of the Team, recently contributed an article entitled Holocene elephant seal distribution implies warmer-than-present climate in the Ross Sea”. The period in question was 1100-2300 BP. Unlike the Hansen article, the article here is not publicly accessible without purchase. Abstract for Hall et al:
We show that southern elephant seal (Mirounga leonina) colonies existed proximate to the Ross Ice Shelf during the Holocene, well south of their core sub-Antarctic breeding and molting grounds. We propose that this was due to warming (including a previously unrecognized period from 1,100 to 2,300 14C yr B.P.) that decreased coastal sea ice and allowed penetration of warmer-than-present climate conditions into the Ross Embayment. If, as proposed in the literature, the ice shelf survived this period, it would have been exposed to environments substantially warmer than present.