AUTHOR=Sun Chenghu , Zuo Jinqing , Shi Xiaohui , Liu Xiangwen , Liu Haiwen 

TITLE=Diverse Inter-Annual Variations of Winter Siberian High and Link With Eurasian Snow in Observation and BCC-CSM2-MR Coupled Model Simulation

JOURNAL=Frontiers in Earth Science

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.761311

DOI=10.3389/feart.2021.761311

ISSN=2296-6463

ABSTRACT=Observational study illustrates that three distinct modes of winter Siberian high exist in observations at inter-annual time scale. In this paper, we compare connection between these diverse Siberian high modes with pre-autumn and simultaneous Eurasian snow cover in observation and BCC-CSM2-MR coupled climate model run under pre-industrial conditions from the CMIP6 project. Our analyses indicate that the inter-annual variation of observed Siberian high modes do have connection with pre-autumn and simultaneous Eurasian snow cover anomalies, but the BCC-CSM2-MR coupled climate model do not well capture the observed diverse Eurasian snow–Siberian high relationships. The BCC-CSM2-MR coupled climate model can partly reproduce the observed Siberian high modes, but fail to capture the spatial distribution and statistics of boreal fall and winter Eurasian snowpack, which is a key facet of simulated diverse Siberian high variability irrespective of the influence of Eurasian snow cover.