Implications of Ural Blocking for East Asian Winter Climate in CMIP5 GCMs. Part I: Biases in the Historical Scenario

摘要

This study assesses the ability of the 25 GCMs from phase 5 of the Coupled Model Intercomparison Project (CMIP5) to simulate Ural blocking (UB) and its linkage with the East Asian winter climate [December-February (DJF)] in a historical run (1950/51-2004/05). A Ural blocking index (UBI) is defined as the DJF-mean blocking frequency over 45 degrees-90 degrees E for each winter.