摘要
黑潮-亲潮交汇区普遍存在的涡旋运动,可通过物质输运和再分配调控叶绿素浓度的时空演变,进而影响该海域的海洋生态环境。基于卫星高度计资料和叶绿素再分析数据,利用流矢量、归一化复合分析等方法,构建不同类型涡旋的各个演变阶段、不同水平尺度范围内,对应的叶绿素浓度三维结构,分析探讨黑潮-亲潮交汇区涡旋运动对叶绿素浓度时空演变的调控作用。结果表明,冷涡区(300 m以浅,3倍半径范围)的叶绿素浓度高值区,自下而上,逐渐扩展至涡心西北方向,且随着深度的增加,叶绿素浓度先增后减。随着气旋涡的演变,各水层叶绿素浓度高值由外向内,逐渐向涡心扩展,而平均半径内的叶绿素浓度输运总量在其稳定期达到最高。暖涡影响范围内的叶绿素浓度总体比冷涡区稍高,其垂向大致呈递减趋势,由上而下,叶绿素浓度低值大致由涡心东南向西北扩展,且随着反气旋涡的演变,叶绿素浓度高值逐渐向涡旋边缘聚集。
The widespread mesoscale eddies in the Kuroshio-Oyashio Confluence Region can regulate the temporal and spatial evolution of chlorophyll a through material transport and redistribution.That will further affect the ocean ecological environment.Based on satellite altimeter observation and chlorophyll a reanalysis data,velocity vector and normalized composite analysis methods were used to detect eddies and construct the three-dimensional structure of chlorophyll a within eddy spatial scales.The temporal and spatial evolution of chlorophyll a corresponding to different horizontal scales were analyzed during different periods of cyclonic and anticyclonic eddy.The eddy movement influences on the chlorophyll a were discussed in the Kuroshio-Oyashio Confluence Region.The results showed that the higher chlorophyll a gradually expanded to the northwest of the eddy center upward within the cold eddies(300 m shallow,3 times radius range).The chlorophyll a increased firstly,and then decreased with the increase of depth.With the cyclonic eddy evolution,the high chlorophyll a gradually expanded to the eddy center at each depth.The total chlorophyll a transport within the mean radius had a highest value at the stable period.Within the anticyclonic eddy,the chlorophyll a was higher than that of the cyclonic eddy.The chlorophyll a decreased with depth downward.the lower chlorophyll a expanded from southeast to northwest of the eddy center.During the evolution process of the anticyclonic eddy,the higher chlorophyll a gradually converged towards the eddy boundary.
作者
闯子维
苏涵
张春玲
邵煜
胡松
CHUANG Ziwei;SU Han;ZHANG Chunling;SHAO Yu;HU Song(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Demonstration Center for Experimental Teaching of Marine Science and Technology,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Marine Ecological Monitoring and Restoration Technologies,MNR,Shanghai 201306,China)
出处
《海洋通报》
CAS
CSCD
北大核心
2024年第4期437-451,共15页
Marine Science Bulletin
基金
国家自然科学基金(42106090)
农业农村部大洋渔业可持续利用重点实验室开放基金(A1-2006-23-200202)。
关键词
涡旋
叶绿素
三维结构
演变特征
黑潮-亲潮交汇区
eddy
chlorophyll a
three-dimensional structure
evolution characters
Kuroshio-Oyashio confluence region
