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1
題名:On the Upper Ocean Thermal Structure in a Western North Pacific Ocean Model: Model Evaluation and Sensitivity Study    
著者:Mien-Tze KuehChung-Hsiung SuiKon-Kee LiuFei Chai
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:ROMS ; Upper ocean thermal structure ; Western North Pacific ; Solar penetration ; Interannual variation ; Model sensitivity
刊名:Terrestrial, Atmospheric and Oceanic Sciences
卷期:21卷1期(2010.2)
頁碼:137-162
語言:英語
摘要: 英文摘要PDF

Seasonal variations in the upper water column of the western North Pacific are simulated with the Regional Ocean Model System (ROMS). The model is driven by surface fluxes of heat, momentum and freshwater without prescribing sea surface temperature or salinity. A series of numerical experiments are conducted to explore the sensitivity of the upper ocean thermal structure to the parameterized solar penetration scheme and two common practices to control model climate through a flux correction term and a nudging term. The absorption of solar radiation by the water column beneath the sea surface destabilizes the upper layers to cause a stronger mixing and deeper mixed layer in the warm season (from April to September). Therefore, removing solar penetration from the model results in an exceptionally stable surface layer, and tends to produce an overly shallow mixed layer in the warm season. The experiment with a prescribed net surface heat flux shows that the model is unable to maintain a heat balance in the upper water column, producing a cooling trend. Experiments with a flux correction term are able to keep the simulated sea surface temperature (SST) from a long term drift by adjusting the amount of the net surface heat flux. However, unrealistic net surface heat flux is produced in the experiment, when the model assumes no solar penetration. The implementation of a weak temperature nudging (1/50 days) toward a long term mean climatology prevents the model from simulating a cold bias during long term integration. The experiment with solar penetration and a weak nudging produces reasonable interannual variability during the period of 1995-2006 without flux corrections. The nudging terms steer advective heat fluxes towards the climatological mean state so as to avoid long-term drift in upper water column heat content. A detailed understanding of the function of nudging terms in controlling the hydrodynamics of the water column remains to be investigated.


    

本卷期目次
Terrestrial, Atmospheric and Oceanic Sciences 21卷1期 (2010.2)
One-Dimensional Sea Ice-Ocean Model Applied to Sheba Experiment in 1997-1998 Winter/ Wen-Yih SunJiun-Dar Chern
Atmospheric Simulations Using OGCM-Assimilation SST: Influence of the Wintertime Japan Sea on Monthly Precipitation/ Masaru YamamotoNaoki Hirose
High-Resolution Numerical Model for Predicting the Transport and Dispersal of Oil Spilled in the Black Sea/ Konstantin A. KorotenkoMalcolm J. BowmanDavid E. Dietrich
On the Upper Ocean Thermal Structure in a Western North Pacific Ocean Model: Model Evaluation and Sensitivity Study/ Mien-Tze KuehChung-Hsiung SuiKon-Kee LiuFei Chai
Seasonal and Interannual Variability of the North-Western Black Sea Ecosystem/ Joanna StanevaVilly KourafalouKostas Tsiaras
Space-Time Transformation in Flux-form Semi-Lagrangian Schemes/ Peter C. ChuChen-Wu Fan
Quasi-Operational Coastal Ocean Nowcast/Forecast Systems/ Christopher N. K. Mooers
Evaluation of Operational Wave Forecasts for the Northeastern Coast of Taiwan/ Beng-Chun LeeHwa ChienHao-Yuan ChengMing-Da Chiou
A Real Time Ocean Forecast System for the North Atlantic Ocean/ Avichal MehraIlya Rivin
Preface to the Special Issue of Numerical Ocean Modeling and Prediction/ Yu-Heng TsengChristopher N. K. MooersMalcolm J. Bowman
A Nested-Grid Ocean Circulation Model for Simulating Three-Dimensional Circulation and Hydrography over Canadian Atlantic Coastal Waters/ Jin-Yu ShengBo Yang
On the Simulation of Shallow Water Tides in the Vicinity of the Taiwan Banks/ Ming-Da ChiouHwa ChienLuca R. CenturioniChia-Chuen Kao
Numerical Simulation of Barotropic Tides around Taiwan/ Chih-Kai HuChao-Tsung ChiuShao-Hua ChenJa-Yu KuoSen JanYu-Heng Tseng
Modeled Oceanic Response and Sea Surface Cooling to Typhoon Kai-Tak/ Yu-Heng TsengSen JanDavid E. DietrichI-I LinYa-Ting ChangTswen-Yung Tang
Predicting Typhoon Induced Storm Surges Using the Operational Ocean Forecast System/ Sung-Hyup You
 
   
 
   

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