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Influence on phytoplankton of different developmental stages of mesoscale eddies off eastern Australia
Liu, FF; Yin, KD; He, L; Tang, SL; Yao, J; helei23@mail.sysu.edu.cn
2018
Source PublicationJOURNAL OF SEA RESEARCH
Volume137Pages:1-8
AbstractThe influence of oceanic mesoscale eddies on their internal phytoplankton levels varies at different developmental stages. Based on 12 years of satellite ocean color observations, we investigated the variability of phytoplankton inside 4564 anticyclonic eddies and 3675 cyclonic eddies off eastern Australia in different development stages using the method of composited average analysis. The results indicated that the lowest level of chlorophyll was observed in the forth (decay) development stage for anticyclonic eddies, which was associated with the warmest SST, largest eddies amplitude, rotation speeds, angular velocities and surface water convergence. It is indicated that downwelling induced by anticyclonic eddies dominates the chlorophyll variations. Because the convergence induced by the ageostrophic velocity components occurred throughout the eddy's development stage, relaxation of the density perturbations (upwelling) associated with eddy decay was not observed in this study. Chlorophyll concentration near the center of cyclonic eddies decreased from the first to the middle stage, and then increased to the largest levels at the last stage. Although vertical motions induced by the ageostrophic velocity components varied from divergence to convergence during the development of an eddy, a higher eddy-ambient water exchange occurred and dominated the increases in total divergence and chlorophyll concentration in the last stage.
Department[Liu, Fenfen; Yin, Kedong; He, Lei; Yao, Juan] Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Guangdong, Peoples R China; [Liu, Fenfen; Yin, Kedong; He, Lei] Key Lab Marine Resources & Coastal Engn Guangdong, Guangzhou 510006, Guangdong, Peoples R China; [Tang, Shilin] Chinese Acad Sci, South China Sea Inst Oceanog, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
KeywordOceanic Eddies Phytoplankton Surface Temperature Divergence East Australian Coastal Ocean
Subject AreaMarine & Freshwater Biology ; Oceanography
Funding ProjectLTO
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17061
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorhelei23@mail.sysu.edu.cn
Recommended Citation
GB/T 7714
Liu, FF,Yin, KD,He, L,et al. Influence on phytoplankton of different developmental stages of mesoscale eddies off eastern Australia[J]. JOURNAL OF SEA RESEARCH,2018,137:1-8.
APA Liu, FF,Yin, KD,He, L,Tang, SL,Yao, J,&helei23@mail.sysu.edu.cn.(2018).Influence on phytoplankton of different developmental stages of mesoscale eddies off eastern Australia.JOURNAL OF SEA RESEARCH,137,1-8.
MLA Liu, FF,et al."Influence on phytoplankton of different developmental stages of mesoscale eddies off eastern Australia".JOURNAL OF SEA RESEARCH 137(2018):1-8.
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