巴塔哥尼亚海域中尺度涡的特征及其与阿根廷滑柔鱼时空分布的关系分析
Analysis of the characteristic statistics of eddies in Patagonia sea and their relationship with the spatial and temporal distribution of Argentine shortfin squid,Illex argentinus
张立川 1朱文斌 2朱凯 2金鹏超 1余为3
作者信息
- 1. 上海海洋大学海洋生物资源与管理学院,上海 201306
- 2. 浙江省海洋水产研究所,浙江 舟山 316021
- 3. 上海海洋大学海洋生物资源与管理学院,上海 201306;国家远洋渔业工程技术研究中心,上海 201306;大洋渔业资源可持续开发教育部重点实验室,上海 201306;农业农村部大洋渔业开发重点实验室,上海 201306;农业农村部大洋渔业资源环境科学观测实验站,上海 201306
- 折叠
摘要
阿根廷滑柔鱼(Illex argentinus)属短生命周期头足类,其资源丰度和分布易受海域环境变动的影响.中尺度涡是该海域重要的动力过程,驱动了海域环境的变动,为获知巴塔哥尼亚海域的涡旋特征以及阿根廷滑柔鱼与其栖息海域中尺度动力过程的关系,本研究通过角动量涡旋检测与追踪算法(angular momentum eddy detection and tracking algorithm,AMEDA)统计了 2013-2019 年巴塔哥尼亚海域的中尺度涡旋,分析了该区域涡旋的时空特征,结合阿根廷滑柔鱼渔业数据,探讨了涡旋内外阿根廷滑柔鱼适宜环境的变化特征,揭示了中尺度涡与阿根廷滑柔鱼资源的关系.结果显示,2013-2019 年共有 2262 个完整生命周期的涡旋,气旋涡与反气旋涡数量相当,主要集中分布在福克兰寒流流域及其右侧海域.气旋涡的生命周期、半径和移动速度等特征均高于反气旋涡.涡旋边缘区域的阿根廷滑柔鱼资源丰度高于涡旋内部,高值多出现于气旋涡的西侧和反气旋涡的西北及东南侧海域.此外,气旋涡中的阿根廷滑柔鱼资源丰度显著高于反气旋涡.海表面温度、200 m水温和叶绿素 a 浓度在气旋涡和反气旋涡内外的分布模态与阿根廷滑柔鱼资源丰度的分布格局相一致.适宜环境的出现频次在气旋涡中更高,且主要分布在涡旋边缘.研究结果为理解涡旋在海洋生态系统中的作用及其对渔业资源的影响提供了重要科学依据.
Abstract
Illex argentinus is a short-lived cephalopods species,and its resource abundance were sensitive to environment variation.Mesoscale eddies are the main dynamics in its habitat sea area,which cause the variation of environment.In order to investigate the characteristics of eddies in Patagonia sea area and the relationship between I.argentinus resources and mesoscale eddies in the sea area,The angular momentum eddy detection and tracking algorithm(AMEDA)was utilized to identify mesoscale eddies in Patagonia from 2013 to 2019,and analyze the temporal and spatial characteristics of the eddies in this region.Based on the fishery data of Argentine shortfin squid Illex argentinus and eddy data,the characteristics of the suitable environment within a twofold radius(±2R)of the anticyclonic and cyclonic eddies were determined,and the relationship between mesoscale eddies and fishery resources was revealed.During the study period,there were 2262 eddies with a complete life cycle,and they were mainly distributed in the Falkland current basin and its vicinity.The number of cyclonic eddies was slightly less than the number of anticyclonic eddies,but the lifespan,radius,velocity,and abundance of fishery resources were higher for cyclonic eddies than for anticyclonic eddies.The abundance of fishery resources was higher at the edge of the twofold radius of the eddies than in the inner area of the eddies,and the high abundance values significantly appeared on the west side of the cyclonic eddies and the northwest and southeast sides of the anticyclonic eddies.The distribution patterns of sea surface temperature,seawater temperature at a depth of 200 m,and chlorophyll-a concentration were consistent with the fishery resource abundance in the area of the twofold radius of the anticyclonic and cyclonic eddies in the fishing ground.Suitable environmental conditions occurred more frequently within gas vortices predominantly along the edges of the cyclonic eddy.These results provide crucial scientific insights into the role of marine mesoscale eddies in ecosystems,while elucidating their impact on fishery resources.
关键词
中尺度涡/环境变化/阿根廷滑柔鱼/资源丰度/巴塔哥尼亚海域Key words
mesoscale eddy/environmental variations/Illex argentinus/abundance/Patagonia引用本文复制引用
基金项目
国家重点研发计划项目(2023YFD2401303)
上海市自然科学基金项目(23ZR1427100)
上海市人才发展资金项目(2021078)
出版年
2024
国家科技期刊平台
NSTL
万方数据