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| 山东近海温度锋分布特征及季节变化研究 |
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姜金光1,2, 龚旭东1, 张洪运1, 刁新源3,2, 于非3,2
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1.中国科学院海洋研究所工程技术部, 山东 青岛 266000;2.中国科学院大学海洋学院, 山东 青岛 266000;3.中国科学院海洋研究所海洋环流与波动重点实验室, 山东 青岛 266000
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| 摘要: |
| 海洋锋是一种非常重要的海洋现象, 锋区内平流和垂直流动引起各海洋学要素发生剧烈变化, 对海洋生物的生态行为具有重要的影响。本文利用NOAA NMFS SWFSC ERD的SST数据和基于ROMS海洋模式建立的中国近海高分辨率气候态数值模型数据,用Sobel方法分析了山东近海温度锋的分布特征和季节变化规律,发现山东近海主要存在沿岸锋、黄海暖流锋和黄海冷水团锋三种温度锋面。其中沿岸温度锋面主要分布在近岸浅水区, 可分为热力温度锋面与潮汐温度锋面两种。冬季受海水降温及黄海暖流的影响各层水体海洋锋分布广泛; 春末潮汐锋及黄海冷水团锋形成; 夏季表层温度锋面最弱, 但表层以下潮汐锋和冷水团锋面达到强盛, 次表层15 m左右深度温度锋面最强盛; 秋季潮汐锋及黄海冷水团锋消退, 黄海暖流锋形成到冬季达到强盛; 因近岸/离岸区域因升降温速率不同产生温差导致的热力温度锋面在各个季节均有产生。 |
| 关键词: 温度锋面 ROMS 黄海暖流 黄海冷水团 海洋牧场 |
| DOI： |
| 分类号:P731 |
| 基金项目:国家重点研发计划项目(2022YFC3104402) |
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| Seasonal distribution and variability of temperature fronts in the coastal waters of Shandong Province |
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JIANG Jinguang1,2, GONG Xudong1, ZHANG Hongyun1, DIAO Xinyuan3,2, YU Fei3,2
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1.Institute of Oceanology, Chinese Academy of Sciences, Department of Engineering and Technology, Qingdao 266000, China;2.University of Chinese Academy of Sciences, College of Marine Sciences, Qingdao 266000, China;3.Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Ocean Circulation and Waves, Qingdao 266000, China
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| Abstract: |
| Ocean fronts are significant oceanic phenomena characterized by intense advection and vertical mixing within frontal zones, which induce abrupt variations in hydrographic properties and exert profound influences on the ecological behavior of marine organisms. Using sea surface temperature data in combination with high-resolution climatological numerical model data for China’s offshore waters based on the ROMS model, this study analyzes the distribution characteristics and seasonal variations of temperature fronts in the coastal waters of Shandong Province using the Sobel method and identifies three predominant temperature fronts in the region: the coastal front, the Yellow Sea Warm Current front, and the Yellow Sea Cold Water Mass front. Among the three temperature fronts, the coastal front is predominantly distributed in nearshore shallow waters and can be categorized into a thermodynamic temperature front and a tidal temperature front. In winter, temperature fronts are widespread across all water layers owing to seawater cooling and the influence of the Yellow Sea Warm Current. In late spring, the tidal front and the Yellow Sea Cold Water Mass front begin to form. In summer, the surface temperature front weakens significantly, whereas the tidal front and the cold-water mass front below the surface layer intensify, with the most pronounced temperature front occurring at depths of approximately 15 m below the sea surface. In autumn, the tidal front and the Yellow Sea Cold Water Mass front gradually dissipate, whereas the Yellow Sea Warm Current front develops and reaches its peak intensity in winter. The thermodynamic temperature front, driven by temperature differences arising from differential heating and cooling rates between nearshore and offshore regions, persists throughout all seasons. |
| Key words: temperature front ROMS Yellow Sea warm current Yellow Sea cold water mass marine ranching |