Final Technical Report

Abstract

We have made significant progress in our proposed work on studying abrupt changes during the Holocene with NCAR-CCSM3 during the term of this project. In addition, in anticipation of the next phase of study, we have spent time on the abrupt changes since the last glacial maximum. First, we have performed further model-data comparison based on our baseline TraCE-21 simulation and made important progress towards the understanding of several major climate transitions. Second, we have made a significant effort in processing the model output of TraCE 21 and have put this output on the NCAR Earth System Grid in single variable format analogous to the CMIP5 protocols for easy access by the community [https://www.earthsystemgrid.org/project/trace.html]. Third, we have completed many additional sensitivity experiments. In addition, we have organized synthesis workshops to facilitate and promote transient model-data comparison for the international community. Finally, we have identified new areas of interest for Holocene climate changes.