Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model
A new generation of the IAP / LASG world ocean general circulation model is designed and presented based on the previous 20-layer model, with enhanced spatial resolutions and improved parameterizations. The model uses a triangular-truncated spectral horizontal grid system with its zonal wave number...
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大气科学进展英文版
1999
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Online Access: | https://hdl.handle.net/20.500.11897/214768 https://doi.org/10.1007/BF02973082 |
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ftpekinguniv:oai:localhost:20.500.11897/214768 2023-05-15T17:25:28+02:00 Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model Jin, XZ Zhang, XH Zhou, TJ Jin, XZ (reprint author), Chinese Acad Sci, Inst Atmospher Phys, LASG, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100080, Peoples R China. Chinese Acad Sci, Inst Atmospher Phys, LASG, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100080, Peoples R China. Peking Univ, Dept Geophys, Beijing 100871, Peoples R China. 1999 https://hdl.handle.net/20.500.11897/214768 https://doi.org/10.1007/BF02973082 en eng 大气科学进展英文版 ADVANCES IN ATMOSPHERIC SCIENCES.1999,16,(2),197-215. 784611 0256-1530 http://hdl.handle.net/20.500.11897/214768 doi:10.1007/BF02973082 WOS:000083103000003 SCI ocean general circulation model thermocline isopycnal mixing THERMOHALINE CIRCULATION CLIMATE SIMULATION SYSTEM Journal 1999 ftpekinguniv https://doi.org/20.500.11897/214768 https://doi.org/10.1007/BF02973082 2021-08-01T08:34:58Z A new generation of the IAP / LASG world ocean general circulation model is designed and presented based on the previous 20-layer model, with enhanced spatial resolutions and improved parameterizations. The model uses a triangular-truncated spectral horizontal grid system with its zonal wave number of 63 (T63) to match its atmospheric counterpart of a T63 spectral atmosphere general circulation model in a planned coupled ocean-atmosphere system. There are 30 layers in vertical direction, of which 20 layers are located above 1000 m for better depicting the permanent thermocline. As previous ocean models developed in IAP / LASG, a free surface (rather than "rigid-lid" approximation) is included in this model. Compared with the 20-layer model, some more detailed physical parameterizations are considered, including the along / cross isopycnal mixing scheme adapted from the Gent-MacWilliams scheme. The model is spun up from a motionless state. Initial conditions for temperature and salinity are taken from the three-dimensional distributions of Levitus' annual mean observation. A preliminary analysis of the first 1000-year integration of a control experiment shows some encouraging improvements compared with the twenty-layer model, particularly in the simulations of permanent thermocline, thermohaline circulation, meridional heat transport, etc. resulted mainly from using the isopycnal mixing scheme. However, the use of isopycnal mixing scheme does not significantly improve the simulated equatorial thermocline. A series of numerical experiments show that the most important contribution to the improvement of equatorial thermocline and the associated equatorial under current comes from reducing horizontal viscosity in the equatorial regions. It is found that reducing the horizontal viscosity in the equatorial Atlantic Ocean may slightly weaken the overturning rate of North Atlantic Deep Water. Meteorology & Atmospheric Sciences SCI(E) 中国科学引文数据库(CSCD) 47 ARTICLE 2 197-215 16 Journal/Newspaper North Atlantic Deep Water North Atlantic Peking University Institutional Repository (PKU IR) Advances in Atmospheric Sciences 16 2 197 215 |
institution |
Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
ocean general circulation model thermocline isopycnal mixing THERMOHALINE CIRCULATION CLIMATE SIMULATION SYSTEM |
spellingShingle |
ocean general circulation model thermocline isopycnal mixing THERMOHALINE CIRCULATION CLIMATE SIMULATION SYSTEM Jin, XZ Zhang, XH Zhou, TJ Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
topic_facet |
ocean general circulation model thermocline isopycnal mixing THERMOHALINE CIRCULATION CLIMATE SIMULATION SYSTEM |
description |
A new generation of the IAP / LASG world ocean general circulation model is designed and presented based on the previous 20-layer model, with enhanced spatial resolutions and improved parameterizations. The model uses a triangular-truncated spectral horizontal grid system with its zonal wave number of 63 (T63) to match its atmospheric counterpart of a T63 spectral atmosphere general circulation model in a planned coupled ocean-atmosphere system. There are 30 layers in vertical direction, of which 20 layers are located above 1000 m for better depicting the permanent thermocline. As previous ocean models developed in IAP / LASG, a free surface (rather than "rigid-lid" approximation) is included in this model. Compared with the 20-layer model, some more detailed physical parameterizations are considered, including the along / cross isopycnal mixing scheme adapted from the Gent-MacWilliams scheme. The model is spun up from a motionless state. Initial conditions for temperature and salinity are taken from the three-dimensional distributions of Levitus' annual mean observation. A preliminary analysis of the first 1000-year integration of a control experiment shows some encouraging improvements compared with the twenty-layer model, particularly in the simulations of permanent thermocline, thermohaline circulation, meridional heat transport, etc. resulted mainly from using the isopycnal mixing scheme. However, the use of isopycnal mixing scheme does not significantly improve the simulated equatorial thermocline. A series of numerical experiments show that the most important contribution to the improvement of equatorial thermocline and the associated equatorial under current comes from reducing horizontal viscosity in the equatorial regions. It is found that reducing the horizontal viscosity in the equatorial Atlantic Ocean may slightly weaken the overturning rate of North Atlantic Deep Water. Meteorology & Atmospheric Sciences SCI(E) 中国科学引文数据库(CSCD) 47 ARTICLE 2 197-215 16 |
author2 |
Jin, XZ (reprint author), Chinese Acad Sci, Inst Atmospher Phys, LASG, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100080, Peoples R China. Chinese Acad Sci, Inst Atmospher Phys, LASG, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100080, Peoples R China. Peking Univ, Dept Geophys, Beijing 100871, Peoples R China. |
format |
Journal/Newspaper |
author |
Jin, XZ Zhang, XH Zhou, TJ |
author_facet |
Jin, XZ Zhang, XH Zhou, TJ |
author_sort |
Jin, XZ |
title |
Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
title_short |
Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
title_full |
Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
title_fullStr |
Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
title_full_unstemmed |
Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model |
title_sort |
fundamental framework and experiments of the third generation of iap/lasg world ocean general circulation model |
publisher |
大气科学进展英文版 |
publishDate |
1999 |
url |
https://hdl.handle.net/20.500.11897/214768 https://doi.org/10.1007/BF02973082 |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
SCI |
op_relation |
ADVANCES IN ATMOSPHERIC SCIENCES.1999,16,(2),197-215. 784611 0256-1530 http://hdl.handle.net/20.500.11897/214768 doi:10.1007/BF02973082 WOS:000083103000003 |
op_doi |
https://doi.org/20.500.11897/214768 https://doi.org/10.1007/BF02973082 |
container_title |
Advances in Atmospheric Sciences |
container_volume |
16 |
container_issue |
2 |
container_start_page |
197 |
op_container_end_page |
215 |
_version_ |
1766116897609220096 |