scholarly journals The importance of high horizontal resolution and accurate coastline geometry in modeling South China Sea Inflow

2001 ◽  
Vol 28 (6) ◽  
pp. 1059-1062 ◽  
Author(s):  
E. Joseph Metzger ◽  
Harley E. Hurlburt
Keyword(s):  
South China Sea ◽  
South China ◽  
Horizontal Resolution ◽  
China Sea ◽  
High Horizontal Resolution

scholarly journals A Simulation Study of Kelvin Waves Interacting with Synoptic Events during December 2016 in the South China Sea and Maritime Continent

2020 ◽  
Vol 33 (15) ◽  
pp. 6345-6359
Author(s):  
Li-Huan Hsu ◽  
Li-Shan Tseng ◽  
Shu-Yu Hou ◽  
Buo-Fu Chen ◽  
Chung-Hsiung Sui
Keyword(s):  
South China Sea ◽  
South China ◽  
Model Simulation ◽  
Horizontal Resolution ◽  
Kelvin Waves ◽  
The South China Sea ◽  
Trade Wind ◽  
The South ◽  
Maritime Continent ◽  
China Sea

Abstract This study evaluates the model simulation of interaction between convectively coupled tropical disturbances in the South China Sea (SCS) and Maritime Continent (MC). The Model for Prediction Across Scales (MPAS) is used to simulate the major interaction events in December 2016 with a fixed 60-km horizontal resolution and a variable 60–15-km resolution. Compared with an observational analysis, the overall spatial and temporal evolution of simulated rainfall and circulation reveals the capability of MPAS for reproducing equatorial Kelvin waves (KWs), and the interactions with equatorial Rossby waves and off-equatorial mixed Rossby–gravity (MRG)/TD-type waves up to a 5–7-day lead in both fixed 60-km and variable 60–15-km resolutions. Two interaction events are further examined. One involves an MRG/TD wave, prevailing northeasterlies, and a Borneo vortex developed in SCS during 6–11 December. The other involves a KW converging with the easterly trade wind that led to an MRG/TD-type wave and the formation of Typhoon Nock-ten during 16–20 December. The MPAS 60–15-km resolution tends to produce stronger precipitation and more coherent vorticity structures in both interaction events. Increasing the resolution to 15 km contributes to better representation of finer spatial vorticity and rainfall structures.

The improvements to the numerical model of South China Sea Ocean Circulations

2020 ◽  
Author(s):  
Xueming Zhu ◽  
Hui Wang ◽  
Ziqing Zu
Keyword(s):  
Numerical Model ◽  
South China Sea ◽  
South China ◽  
Horizontal Resolution ◽  
Forecast Skill ◽  
Sea Surface ◽  
China Sea ◽  
Terrain Following ◽  
Direct Forcing ◽  
Forecasting System

<p>The South China Sea (SCS) ocean circulations numerical model has been build up based on ROMS with high horizontal resolution. It had been operated in NMEFC to provide daily updated the hydrodynamic forecasting in SCS for the future 5 days since 2013, and named as the SCS operational Oceanography Forecasting System (SCSOFS). Recently, a few systematic optimizations have been carried out to the configuration of the physical model to improve SCSOFS forecast skill. For example, the differential schemes of horizontal and vertical advection of tracers are changed from 4<sup>th</sup>-order centered to 4<sup>th</sup>-ordered Akima, the schemes of horizontal mixing of tracers are changed from along epineutral surfaces to along geopotential surfaces, in order to correct for the spurious diapycnal diffusion of the advection operator in terrain-following coordinates, which could cause anomaly temperature increasing about 1 centigrade in deep layer. The method of sea surface atmospheric forcing is changed from direct forcing to bulk formula, by introducing the negative feedback effects between ocean and atmosphere, in order to improve forecast skill of sea surface temperature.</p>

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