TY - JOUR
T1 - BCC-CSM2-HR
T2 - A high-resolution version of the Beijing Climate Center Climate System Model
AU - Wu, Tongwen
AU - Yu, Rucong
AU - Lu, Yixiong
AU - Jie, Weihua
AU - Fang, Yongjie
AU - Zhang, Jie
AU - Zhang, Li
AU - Xin, Xiaoge
AU - Li, Laurent
AU - Wang, Zaizhi
AU - Liu, Yiming
AU - Zhang, Fang
AU - Wu, Fanghua
AU - Chu, Min
AU - Li, Jianglong
AU - Li, Weiping
AU - Zhang, Yanwu
AU - Shi, Xueli
AU - Zhou, Wenyan
AU - Yao, Junchen
AU - Liu, Xiangwen
AU - Zhao, He
AU - Yan, Jinghui
AU - Wei, Min
AU - Xue, Wei
AU - Huang, Anning
AU - Zhang, Yaocun
AU - Zhang, Yu
AU - Shu, Qi
AU - Hu, Aixue
N1 - Publisher Copyright:
© 2021 Copernicus GmbH. All rights reserved.
PY - 2021/5/26
Y1 - 2021/5/26
N2 - BCC-CSM2-HR is a high-resolution version of the Beijing Climate Center (BCC) Climate System Model (T266 in the atmosphere and 1=4 latitude1=4 longitude in the ocean). Its development is on the basis of the mediumresolution version BCC-CSM2-MR (T106 in the atmosphere and 1 latitude1 longitude in the ocean) which is the baseline for BCC participation in the Coupled Model Intercomparison Project Phase 6 (CMIP6). This study documents the high-resolution model, highlights major improvements in the representation of atmospheric dynamical core and physical processes. BCC-CSM2-HR is evaluated for historical climate simulations from 1950 to 2014, performed under CMIP6-prescribed historical forcing, in comparison with its previous medium-resolution version BCC-CSM2-MR. Observed global warming trends of surface air temperature from 1950 to 2014 are well captured by both BCC-CSM2-MR and BCC-CSM2-HR. Present-day basic atmospheric mean states during the period from 1995 to 2014 are then evaluated at global scale, followed by an assessment on climate variabilities in the tropics including the tropical cyclones (TCs), the El Ni o Southern Oscillation (ENSO), the Madden Julian Oscillation (MJO), and the quasi-biennial oscillation (QBO) in the stratosphere. It is shown that BCC-CSM2-HR represents the global energy balance well and can realistically reproduce the main patterns of atmospheric temperature and wind, precipitation, land surface air temperature, and sea surface temperature (SST). It also improves the spatial patterns of sea ice and associated seasonal variations in both hemispheres. The bias of the double intertropical convergence zone (ITCZ), obvious in BCC-CSM2-MR, almost disappears in BCC-CSM2-HR. TC activity in the tropics is increased with resolution enhanced. The cycle of ENSO, the eastward propagative feature and convection intensity ofMJO, and the downward propagation of QBO in BCC-CSM2-HR are all in a better agreement with observations than their counterparts in BCC-CSM2-MR. Some imperfections are, however, noted in BCC-CSM2-HR, such as the excessive cloudiness in the eastern basin of the tropical Pacific with cold SST biases and the insufficient number of tropical cyclones in the North Atlantic.
AB - BCC-CSM2-HR is a high-resolution version of the Beijing Climate Center (BCC) Climate System Model (T266 in the atmosphere and 1=4 latitude1=4 longitude in the ocean). Its development is on the basis of the mediumresolution version BCC-CSM2-MR (T106 in the atmosphere and 1 latitude1 longitude in the ocean) which is the baseline for BCC participation in the Coupled Model Intercomparison Project Phase 6 (CMIP6). This study documents the high-resolution model, highlights major improvements in the representation of atmospheric dynamical core and physical processes. BCC-CSM2-HR is evaluated for historical climate simulations from 1950 to 2014, performed under CMIP6-prescribed historical forcing, in comparison with its previous medium-resolution version BCC-CSM2-MR. Observed global warming trends of surface air temperature from 1950 to 2014 are well captured by both BCC-CSM2-MR and BCC-CSM2-HR. Present-day basic atmospheric mean states during the period from 1995 to 2014 are then evaluated at global scale, followed by an assessment on climate variabilities in the tropics including the tropical cyclones (TCs), the El Ni o Southern Oscillation (ENSO), the Madden Julian Oscillation (MJO), and the quasi-biennial oscillation (QBO) in the stratosphere. It is shown that BCC-CSM2-HR represents the global energy balance well and can realistically reproduce the main patterns of atmospheric temperature and wind, precipitation, land surface air temperature, and sea surface temperature (SST). It also improves the spatial patterns of sea ice and associated seasonal variations in both hemispheres. The bias of the double intertropical convergence zone (ITCZ), obvious in BCC-CSM2-MR, almost disappears in BCC-CSM2-HR. TC activity in the tropics is increased with resolution enhanced. The cycle of ENSO, the eastward propagative feature and convection intensity ofMJO, and the downward propagation of QBO in BCC-CSM2-HR are all in a better agreement with observations than their counterparts in BCC-CSM2-MR. Some imperfections are, however, noted in BCC-CSM2-HR, such as the excessive cloudiness in the eastern basin of the tropical Pacific with cold SST biases and the insufficient number of tropical cyclones in the North Atlantic.
UR - https://www.scopus.com/pages/publications/85106948373
U2 - 10.5194/gmd-14-2977-2021
DO - 10.5194/gmd-14-2977-2021
M3 - Article
AN - SCOPUS:85106948373
SN - 1991-959X
VL - 14
SP - 2977
EP - 3006
JO - Geoscientific Model Development
JF - Geoscientific Model Development
IS - 5
ER -