| 摘要: |
| 黄-东海界面营养盐交换通量反映了黄海和东海之间营养盐的输运状况。本研究基于三维动力-生态耦合模型,对黄-东海界面水通量和溶解无机氮(DIN)交换通量的年际变化进行分析。结果显示:黄-东海界面水通量和DIN通量年际变化显著。9年间水通量均值为0.35×106 m3/s,其中最大值在2017年,最小值在2014年。DIN通量多年平均值为2.71×106 mmol/s,最大值出现在水通量最大的2017年,最小值出现在DIN浓度最小的2011年。分析表明,黄-东海界面DIN通量的年际变化主要受水通量年际变化控制。在空间分布上,界面西部上层水域和东部底层水域DIN通量年际变化较为剧烈。西部上层水域DIN通量年际变化主要由流速的年际变化控制;东部底层水域DIN通量的年际变化由DIN浓度和流速的年际变化共同调控。黄-东海界面冬季与夏季DIN交换通量年际变化的控制因子不同,冬季受水通量和DIN浓度共同控制,而夏季主要受水通量控制。 |
| 关键词: 黄-东海界面 水通量 营养盐通量 年际变化 数值模拟 |
| DOI：10.11759/hykx20240930001 |
| 分类号:P76 |
| 基金项目:国家自然科学基金项目(42176022,42141017) |
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| Interannual variations in water volume and dissolved inorganic nitrogen exchange fluxes across the boundary between the Yellow Sea and the East China Sea |
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LIU Yujun1, LUO Yifei2, SHI Jie1, GUO Xinyu2
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1.Key Laboratory of Marine Environment and Ecology, College of Environmental Science and Engineering, Ocean University of China, Ministry of Education, Qingdao 266100, China;2.Center for Marine Environmental Studies, Ehime University, Matsuyama 790-8577, Japan
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| Abstract: |
| The boundary between the Yellow Sea (YS) and the East China Sea (ECS) (YE Section) reflects the interaction effects between the YS and the ECS. This study analyzed the interannual variations in water volume and dissolved inorganic nitrogen (DIN) exchange fluxes across the YE Section from 2010 to 2018, based on hydrodynamic and ecological field results obtained using a three-dimensional physical-biochemical coupled model. The results showed significant interannual variations in water volume and DIN exchange fluxes across the YE Section. The average water volume exchange over the 9-year period was 0.35×106 m3/s, with the maximum occurring in 2017 and the minimum in 2014. The multi-year average DIN flux was 2.71 × 106 mmol/s. The maximum DIN flux also appeared in 2017, coinciding with the year of the highest water flux, whereas the minimum occurred in 2011, when DIN concentrations were the lowest. The analysis indicated that the interannual variations in DIN flux across the YE Section were primarily controlled by the interannual changes in water volume transport. Spatially, the interannual variations in DIN flux were more pronounced in the upper waters of the western part of the YE Section and in the bottom waters of the eastern part. The interannual variations of DIN flux in the upper waters of the western part were mainly controlled by interannual changes in current velocity, whereas those in the bottom eastern waters were jointly regulated by interannual variations in DIN concentration and current velocity. Additionally, the dominant factors controlling interannual variations in DIN fluxes differed between winter and summer across the YE Section. In winter, water volume transport and DIN concentration contributed to the variations, whereas in summer, the variations were primarily controlled by water flux. |
| Key words: the boundary between the Yellow Sea and the East China Sea water volume transport nutrient exchange flux interannual variations numerical simulation |
