The Beijing Climate Center Climate System Model (BCC-CSM): the main progress from CMIP5 to CMIP6
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Published:2019-04-24
Issue:4
Volume:12
Page:1573-1600
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ISSN:1991-9603
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Container-title:Geoscientific Model Development
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language:en
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Short-container-title:Geosci. Model Dev.
Author:
Wu TongwenORCID, Lu YixiongORCID, Fang Yongjie, Xin Xiaoge, Li LaurentORCID, Li Weiping, Jie Weihua, Zhang Jie, Liu Yiming, Zhang Li, Zhang Fang, Zhang Yanwu, Wu FanghuaORCID, Li Jianglong, Chu Min, Wang Zaizhi, Shi XueliORCID, Liu Xiangwen, Wei Min, Huang Anning, Zhang Yaocun, Liu Xiaohong
Abstract
Abstract. The main advancements of the Beijing Climate Center (BCC) climate system model from
phase 5 of the Coupled Model Intercomparison Project (CMIP5) to phase
6 (CMIP6) are presented, in terms of physical parameterizations and model
performance. BCC-CSM1.1 and BCC-CSM1.1m are the two models involved in CMIP5,
whereas BCC-CSM2-MR, BCC-CSM2-HR, and BCC-ESM1.0 are the three models configured for
CMIP6. Historical simulations from 1851 to 2014 from BCC-CSM2-MR (CMIP6) and
from 1851 to 2005 from BCC-CSM1.1m (CMIP5) are used for models assessment.
The evaluation matrices include the following: (a) the energy budget at
top-of-atmosphere; (b) surface air temperature, precipitation, and atmospheric circulation for
the global and East Asia regions; (c) the sea surface temperature (SST) in the
tropical Pacific; (d) sea-ice extent and thickness and Atlantic Meridional
Overturning Circulation (AMOC); and (e) climate variations at different timescales, such as the global warming trend in the 20th century, the stratospheric
quasi-biennial oscillation (QBO), the Madden–Julian Oscillation (MJO), and the diurnal
cycle of precipitation. Compared with BCC-CSM1.1m, BCC-CSM2-MR shows
significant improvements in many aspects including the tropospheric air
temperature and circulation at global and regional scales in East Asia and
climate variability at different timescales, such as the QBO, the MJO, the diurnal cycle
of precipitation, interannual variations of SST in the equatorial Pacific,
and the long-term trend of surface air temperature.
Publisher
Copernicus GmbH
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