MASNUM-WAM中谱增长限制的改进及检验  

Improvement and Examination for the Growth Spectrum Limit in the MASNUM-WAM Model

作　　者：杜建廷[1,2] 华锋[1,2] 王道龙[1,2] 江兴杰[1,2] 江志辉[1,2] 

机构地区：[1]海洋环境科学与数值模拟国家海洋局重点实验室,山东青岛266061 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2013年第1期31-37,共7页Advances in Marine Science

基　　金：国家高技术研究发展计划--南海海洋动力环境数据集成与应用技术系统开发(2008AA09A404);南海深水区海洋动力环境立体监测技术研发(2008AA09A401);国家自然科学基金委面上项目--破碎统计及耗散源函数研究(40876016);国家海洋局青年海洋科学基金--台风数模风场分布的改进研究及其验证(2011248)

摘　　要：低风速条件下,用MASNUM-WAM模拟海浪时有效波高较实际偏低。通过数值试验发现谱的增长限制是造成该问题的主要原因,并基于量纲齐次原则对原谱增长限制进行了分析和改进。风浪的无因次有限风区成长关系对比检验表明,改进后的模式模拟海浪的能力在低风速、小风区情况下有显著提高,在高风速、大风区等极端条件下也有较大的改进。Under low wind speed conditions the significant wave height simulated with MASNUM ocean wave numerical model is lower than the measured one. Numerical experiments have revealed that this problem is mainly due to the growth spectrum limit in the model. To solve this problem, the original growth spectrum limit in the MASNUM-WAM is analyzed and improved based on the principle of dimensional homogeneity. The comparison with the dimensionless fetch-limited growth relationship has indicated that the capability of the improved model is substantially improved in the simulation of sea waves not only under the low wind speed and small fetch conditions, but also under extreme conditions of high wind speeds and large fetches.

关 键 词：MASNUM-WAM 谱增长限制 量纲齐次原则 有限风区成长关系 

分 类 号：P731.22[天文地球—海洋科学]