| 摘要: |
| 运用三层嵌套网格的ROMS模式较好地模拟了2009年冬季珠江口的主要水动力过程和盐度分布。结果表明, 珠江口盐度层化具有明显的潮周期变化特征, 涨潮时表底层盐度差较小, 层化较弱; 落潮时层化较强。利用势能异常变化平衡方程分析影响层化的贡献项, 结果表明势能异常的平流项和应变项是影响珠江口势能异常变化的主要因素。 |
| 关键词: ROMS模式 盐度层化 势能异常 珠江口 |
| DOI：10.11693/hyhz201303002002 |
| 分类号: |
| 基金项目:国家重点基础研究发展计划(973)项目, 2011CB403505 号; 国家自然科学基金青年科学基金项目, 41006012 号; 中国科学院南海海洋研究所青年人才领域前沿项目, SQ201002 号 |
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| NUMERICAL SIMULATION OF WINTER SALINITY STRATIFICATION IN THE PEARL RIVER ESTUARY (PRE) BASED ON A TRIPLE-NESTED MODELING SYSTEM |
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ZHOU Wei1, WANG Dong-Xiao2, ZU Ting-Ting2, LI Hai-Yang2,3, XIAO Xian-Jun1
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1.Laboratory for Climate Studies, National Climate Center, China Meteorological Administration;2.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences;3.Weather Station of Nansha District
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| Abstract: |
| A high-resolution three-dimensional numerical model using Regional Ocean Modeling System (ROMS) was built up to reproduce the primary hydrodynamics and the characteristic of salinity distribution in the Pearl River estuary (PRE). Stratification induced by intra-tidal variation of salinity is obvious in the PRE. The salinity difference between surface and bottom is small and stratification is weak during flood, and the water tends to be stratified during ebb. A dynamic equation for the potential energy anomaly budget was used to investigate the contributing terms to the modulation of stratification. The depth-mean straining and potential energy anomaly advection appear to be the major terms that affect the potential energy anomaly in the PRE. |
| Key words: ROMS model salinity stratification potential energy anomaly Pearl River estuary |
