The Webb-Resio-Tracy(WRT) method for exact computation of the non-linear energy transfer rate was implemented in MASNUM-WAM, which is a third-generation wave model solving the discrete spectral balance equation. In th...The Webb-Resio-Tracy(WRT) method for exact computation of the non-linear energy transfer rate was implemented in MASNUM-WAM, which is a third-generation wave model solving the discrete spectral balance equation. In this paper, we describe the transformation of the spectral space in the original WRT method. Four numerical procedures were developed in which the acceleration techniques in the original WRT method, such as geometric scaling, pre-calculating, and grid-searching, are all reorganized. A series of numerical experiments including two simulations based on real data were performed. The availability of such implementation in both serial and parallel versions of the wave model was proved, and a comparison of computation times showed that some of the developed procedures provided good effi cacy. With exact computation of non-linear energy transfer, MASNUM-WAM now can be used to perform numerical experiments for research purposes, which augurs well for further developments of the model.展开更多
This paper presents a comprehensive analysis of the wave energy characteristics of the South China Sea(SCS)for 2015-2100 based on three Shared Socioeconomic Pathway(SSP)scenarios denoted SSP126,SSP245,and SSP585,repre...This paper presents a comprehensive analysis of the wave energy characteristics of the South China Sea(SCS)for 2015-2100 based on three Shared Socioeconomic Pathway(SSP)scenarios denoted SSP126,SSP245,and SSP585,representing the low,medium,high future forcing pathways proposed in the Coupled Model Intercomparison Project phase 6(CMIP6).Averages and trends of selected wave energy parameters under the three future scenarios were analyzed and compared.These parameters are recommended by the International Electrotechnical Commission Technical Specification(62600-101:2015)and can be accessed for wind waves and swells separately.Results suggest that wind waves are substantial contributors of wave energy in the northern part of the study area,whereas swells are more dominant in the other parts.Water depths have more pronounced impacts on the wave energy directions and the frequency and directional spreads in nearshore regions,especially in the Gulf of Thailand.Wave energy magnitude does not change much under SSP126 across the entire SCS.However,in the northern SCS,it increases under SSP245 and decreases under SSP585;and it increases in the southern SCS and decreases in the Gulf Thailand under both SSP245 and SSP585.At certain locations,trends of the magnitudes of wave energy do not reflect the level of forcing of the scenarios.These abnormalities can be traced to wind speed belts that have similar abnormal trends in the northern part of the study area and in the regions adjacent to the northeastern corner of the study area.展开更多
基金Supported by the State Oceanic Administration Marine Science Foundation for Young Scientists(Nos.2012245,2012249)
文摘The Webb-Resio-Tracy(WRT) method for exact computation of the non-linear energy transfer rate was implemented in MASNUM-WAM, which is a third-generation wave model solving the discrete spectral balance equation. In this paper, we describe the transformation of the spectral space in the original WRT method. Four numerical procedures were developed in which the acceleration techniques in the original WRT method, such as geometric scaling, pre-calculating, and grid-searching, are all reorganized. A series of numerical experiments including two simulations based on real data were performed. The availability of such implementation in both serial and parallel versions of the wave model was proved, and a comparison of computation times showed that some of the developed procedures provided good effi cacy. With exact computation of non-linear energy transfer, MASNUM-WAM now can be used to perform numerical experiments for research purposes, which augurs well for further developments of the model.
基金Laoshan Laboratory under contract No.LSKJ202202100the Basic Scientific Fund for National Public Research Institute of China(Shu-Xingbei Young Talent Program)under contract No.2023S01+2 种基金the National Key Research and Development Program of China under contract Nos 2022YFC3104801 and 2022YFC3104803the Open Research Fund of Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention under contract No.GPKLMD2023005the China-Korea Joint Ocean Research Center under contract No.GHKJ2024005。
文摘This paper presents a comprehensive analysis of the wave energy characteristics of the South China Sea(SCS)for 2015-2100 based on three Shared Socioeconomic Pathway(SSP)scenarios denoted SSP126,SSP245,and SSP585,representing the low,medium,high future forcing pathways proposed in the Coupled Model Intercomparison Project phase 6(CMIP6).Averages and trends of selected wave energy parameters under the three future scenarios were analyzed and compared.These parameters are recommended by the International Electrotechnical Commission Technical Specification(62600-101:2015)and can be accessed for wind waves and swells separately.Results suggest that wind waves are substantial contributors of wave energy in the northern part of the study area,whereas swells are more dominant in the other parts.Water depths have more pronounced impacts on the wave energy directions and the frequency and directional spreads in nearshore regions,especially in the Gulf of Thailand.Wave energy magnitude does not change much under SSP126 across the entire SCS.However,in the northern SCS,it increases under SSP245 and decreases under SSP585;and it increases in the southern SCS and decreases in the Gulf Thailand under both SSP245 and SSP585.At certain locations,trends of the magnitudes of wave energy do not reflect the level of forcing of the scenarios.These abnormalities can be traced to wind speed belts that have similar abnormal trends in the northern part of the study area and in the regions adjacent to the northeastern corner of the study area.
