| 摘要: |
| 冷水团作为北黄海重要的季节性水文现象,其时空变化对黄海水文泥沙环境有重要影响。然而,关于北黄海冷水团年际变化的研究较少。本文基于2010—2024年连续15 a的实测水文数据,通过刻画底层温盐的水平分布与垂直剖面变化特征,结合冷水团影响区域的温跃层强度、深度等指标,系统分析冷水团的三维变化及其影响因素。研究结果表明,北黄海冷水团底层冷水的面积呈缩小趋势,温度升高,盐度降低;冷水团影响海域温跃层强度先增强,至2023年后减弱,而温跃层深度整体上呈加深趋势;冷水团垂向面积主要与风速正相关,同时受渤海海峡冷水输入影响。本研究系统揭示了北黄海冷水团的年际变化特征,不同于以往研究限于单次航次局部海域分析,而是基于长时间序列、覆盖冷水团海域的多年实测资料,在以往关注季节变化或短期变化的基础上,揭示了北黄海冷水团的年际变化特征,为理解其气候变化响应提供了新证据,对研究黄海水沙环境长期演变有重要意义。 |
| 关键词: 北黄海 冷水团 年际变化 温跃层 |
| DOI：10.11759/hykx20250702001 |
| 分类号:P731 |
| 基金项目:国家自然科学基金(42576158);国家重点研发计划政府间国际科技创新合作专项(2024YFE0116400);山东省自然科学基金资助项目(ZR2024MD002) |
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| Interannual variations of the North Yellow Sea Cold Water Mass based on in-situ data |
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QI Yuqian1, QIAO Lulu1,2, MIAO Hongbing1, ZHANG Sichen1, XUE Wenjing1
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1.College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;2.Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao 266100, China
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| Abstract: |
| As an important seasonal hydrological phenomenon in the North Yellow Sea, the cold water mass exerts significant influence on the hydrological and sedimentary environment of the Yellow Sea through its spatiotemporal variations. However, studies on the interannual variability of the North Yellow Sea Cold Water Mass (NYSCWM) remain limited. Based on 15 consecutive years of in-situ hydrological data from 2010 to 2024, this study systematically analyzes the three-dimensional evolution of the NYSCWM and its influencing factors by characterizing the horizontal distribution and vertical profile variations of bottom temperature and salinity, combined with indicators such as thermocline intensity and depth in the area affected by the cold water mass. The results show that the area of bottom cold water within the NYSCWM exhibits a shrinking trend, with increasing temperature and decreasing salinity. The thermocline intensity in the area affected by the cold water mass first strengthens and then weakens after 2023, while the thermocline depth overall shows a deepening trend. The vertical area of the cold water mass is positively correlated with wind speed and is also influenced by cold water input from the Bohai Strait. This study systematically reveals the interannual variation characteristics of the NYSCWM. Unlike previous studies that were limited to single cruises or analyses of local sea areas, this study is based on a long time series of multi-year field observations covering the entire cold water mass region. On the basis of previous research focusing on seasonal or short-term changes, it further elucidates the interannual variability of the NYSCWM, providing new evidence for understanding its response to climate change and holding significant implications for the study of the long-term evolution of the water and sediment environment in the Yellow Sea. |
| Key words: North Yellow Sea cold water mass interannual change thermocline |
