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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2018-254
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2018-254
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 13 Nov 2018

Model description paper | 13 Nov 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

The Beijing Climate Center Climate System Model (BCC-CSM): Main Progress from CMIP5 to CMIP6

Tongwen Wu1, Yixiong Lu1, Yongjie Fang1, Xiaoge Xin1, Laurent Li1,2, Weiping Li1, Weihua Jie1, Jie Zhang1, Yiming Liu1, Li Zhang1, Fang Zhang1, Yanwu Zhang1, Fanghua Wu1, Jianglong Li1, Min Chu1, Zaizhi Wang1, Xueli Shi1, Xiangwen Liu1, Min Wei3, Anning Huang4, Yaocun Zhang4, and Xiaohong Liu1,5 Tongwen Wu et al.
  • 1Beijing Climate Center, China Meteorological Administration, Beijing, China
  • 2Laboratoire de Météorologie Dynamique, IPSL, CNRS, Sorbonne Université, Paris, France
  • 3National Meteorological Information Center, China Meteorological Administration, Beijing, China
  • 4Nanjing University, Nanjing, China
  • 5University of Wyoming, Laramie, WY, USA

Abstract. Main progresses of Beijing Climate Center (BCC) climate system model from the phase five of the Coupled Model Intercomparison Project (CMIP5) to its phase six (CMIP6) are presented, in terms of physical parameterizations and models performance. BCC-CSM1.1 and BCC-CSM1.1m are the two models involved in CMIP5, and 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 (a) energy budget at top of the atmosphere, (b) surface air temperature, precipitation, and atmospheric circulation for global and East Asia regions, (c) sea ice extent and thickness and Atlantic Meridional Overturning Circulation (AMOC), and (d) climate variations at different time scales such as global warming trend in the 20th century, stratospheric quasi-biennial oscillation (QBO), Madden-Julian Oscillation (MJO) and diurnal cycle of precipitation. Compared to BCC CMIP5 models, BCC CMIP6 models show significant improvements in many aspects including: tropospheric air temperature and circulation at global and regional scale in East Asia, climate variability at different time scales such as QBO, MJO, diurnal cycle of precipitation, and long-term trend of surface air temperature.

Tongwen Wu et al.
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Latest update: 10 Dec 2018
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Short summary
This paper presented main progress of BCC model transition from CMIP5 to CMIP6, especially in both model resolution and its physics. Compared to BCC CMIP5 models, BCC CMIP6 model show significant improvements for historical simulations in many aspects including: tropospheric air temperature and circulation at global and regional scale in East Asia, climate variability at different time scales such as QBO, MJO, diurnal cycle of precipitation, and long-term trend of global air temperature.
This paper presented main progress of BCC model transition from CMIP5 to CMIP6, especially in...
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