摘要：The combination of several climate proxies and/or the results from cli-mate models enables us to reconstruct and understand past climate changes. When data and models are used to-gether, the information inferred from the proxies often serves to validate the climate model results while the mod-els allow exploration of the physical processes responsible for the recorded climatic changes. During the past de -cade, a new statistical tool called data assimilation has been used in paleocli-matology (Widmann et al. 2010). This tool allows us to build a reconstruction of past climate change which is both consistent with the climate computed by a model and that deduced from proxies
