Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study
The Kuroshio Current flows northeastward along the East China Sea (ECS) shelf break, carrying a large amount of nutrients, and is thus an important source of nutrients for the ECS. The mainstream and transport of the Kuroshio Current are significantly affected by mesoscale eddies. However, the influ...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.1079418/full |
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| author | Lingjing Xu Lingjing Xu Lingjing Xu Lingjing Xu Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Xingru Feng Xingru Feng Xingru Feng Xingru Feng Xingru Feng Junchuan Sun Junchuan Sun Guandong Gao Guandong Gao Guandong Gao Guandong Gao Guandong Gao Xuan Cui Xuan Cui Xuan Cui Xuan Cui Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin |
| author_facet | Lingjing Xu Lingjing Xu Lingjing Xu Lingjing Xu Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Xingru Feng Xingru Feng Xingru Feng Xingru Feng Xingru Feng Junchuan Sun Junchuan Sun Guandong Gao Guandong Gao Guandong Gao Guandong Gao Guandong Gao Xuan Cui Xuan Cui Xuan Cui Xuan Cui Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin |
| author_sort | Lingjing Xu |
| collection | DOAJ |
| description | The Kuroshio Current flows northeastward along the East China Sea (ECS) shelf break, carrying a large amount of nutrients, and is thus an important source of nutrients for the ECS. The mainstream and transport of the Kuroshio Current are significantly affected by mesoscale eddies. However, the influence of mesoscale eddies on the Kuroshio nutrient input into the ECS is unknown. We add constructed cyclonic and anticyclonic eddies to a hydrodynamic model to explore the influence of mesoscale eddies on cross-shelf Kuroshio phosphate input into the ECS. This model suitably reproduces the fate of mesoscale eddies and the variation in the Kuroshio Current during eddy-current interactions. The simulation results reveal that during the strong interaction between the Kuroshio Current and mesoscale eddy east of Taiwan, the cyclonic eddy reduces the on-shelf phosphate flux, while the anticyclonic eddy increases the Kuroshio phosphate input to the ECS. When the anticyclonic eddy moves to the Okinawa Trough, it reduces the Kuroshio phosphate input into the ECS.These basic features are not sensitive to the initial latitude of the eddy center east of Taiwan. The change in cross-shelf phosphate flux is caused by the changes in cross-shelf velocity and phosphate concentration along the shelf. Momentum balance analyses suggest that the change in cross-shelf velocity is mainly caused by the change in the pressure gradient term due to eddy-induced changes in sea surface height in the horizontal direction and isotherm tilting in the vertical direction. The advection-diffusion equation analysis shows that the change in phosphate concentration along the shelf is attributed to changes in the upper horizontal advection and lower vertical advection of phosphate, which are induced by the upper phosphate change and vertical velocity change along the shelf, respectively. This study has important implications for the possible response of the ECS ecosystem to mesoscale eddies that are partly triggered by enhanced typhoons east of Taiwan under global warming. |
| first_indexed | 2024-04-10T21:39:50Z |
| format | Article |
| id | doaj.art-01e1ee2265c446eab6d12506bca3b924 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-10T21:39:50Z |
| publishDate | 2023-01-01 |
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| series | Frontiers in Marine Science |
| spelling | doaj.art-01e1ee2265c446eab6d12506bca3b9242023-01-19T05:24:31ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-01-01910.3389/fmars.2022.10794181079418Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling studyLingjing Xu0Lingjing Xu1Lingjing Xu2Lingjing Xu3Dezhou Yang4Dezhou Yang5Dezhou Yang6Dezhou Yang7Dezhou Yang8Xingru Feng9Xingru Feng10Xingru Feng11Xingru Feng12Xingru Feng13Junchuan Sun14Junchuan Sun15Guandong Gao16Guandong Gao17Guandong Gao18Guandong Gao19Guandong Gao20Xuan Cui21Xuan Cui22Xuan Cui23Xuan Cui24Baoshu Yin25Baoshu Yin26Baoshu Yin27Baoshu Yin28Baoshu Yin29CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCollege of Marine Sciences, University of Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCollege of Marine Sciences, University of Chinese Academy of Sciences, Beijing, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaKey Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCollege of Marine Sciences, University of Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaPilot National Laboratory for Marine Science and Technology, Qingdao, ChinaCenter for Ocean Mega−Science, Chinese Academy of Sciences, Qingdao, ChinaCAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCollege of Marine Sciences, University of Chinese Academy of Sciences, Beijing, ChinaThe Kuroshio Current flows northeastward along the East China Sea (ECS) shelf break, carrying a large amount of nutrients, and is thus an important source of nutrients for the ECS. The mainstream and transport of the Kuroshio Current are significantly affected by mesoscale eddies. However, the influence of mesoscale eddies on the Kuroshio nutrient input into the ECS is unknown. We add constructed cyclonic and anticyclonic eddies to a hydrodynamic model to explore the influence of mesoscale eddies on cross-shelf Kuroshio phosphate input into the ECS. This model suitably reproduces the fate of mesoscale eddies and the variation in the Kuroshio Current during eddy-current interactions. The simulation results reveal that during the strong interaction between the Kuroshio Current and mesoscale eddy east of Taiwan, the cyclonic eddy reduces the on-shelf phosphate flux, while the anticyclonic eddy increases the Kuroshio phosphate input to the ECS. When the anticyclonic eddy moves to the Okinawa Trough, it reduces the Kuroshio phosphate input into the ECS.These basic features are not sensitive to the initial latitude of the eddy center east of Taiwan. The change in cross-shelf phosphate flux is caused by the changes in cross-shelf velocity and phosphate concentration along the shelf. Momentum balance analyses suggest that the change in cross-shelf velocity is mainly caused by the change in the pressure gradient term due to eddy-induced changes in sea surface height in the horizontal direction and isotherm tilting in the vertical direction. The advection-diffusion equation analysis shows that the change in phosphate concentration along the shelf is attributed to changes in the upper horizontal advection and lower vertical advection of phosphate, which are induced by the upper phosphate change and vertical velocity change along the shelf, respectively. This study has important implications for the possible response of the ECS ecosystem to mesoscale eddies that are partly triggered by enhanced typhoons east of Taiwan under global warming.https://www.frontiersin.org/articles/10.3389/fmars.2022.1079418/fullcross-shelf transportKuroshio Currentmesoscale eddyphosphatenumerical simulation |
| spellingShingle | Lingjing Xu Lingjing Xu Lingjing Xu Lingjing Xu Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Dezhou Yang Xingru Feng Xingru Feng Xingru Feng Xingru Feng Xingru Feng Junchuan Sun Junchuan Sun Guandong Gao Guandong Gao Guandong Gao Guandong Gao Guandong Gao Xuan Cui Xuan Cui Xuan Cui Xuan Cui Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin Baoshu Yin Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study Frontiers in Marine Science cross-shelf transport Kuroshio Current mesoscale eddy phosphate numerical simulation |
| title | Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study |
| title_full | Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study |
| title_fullStr | Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study |
| title_full_unstemmed | Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study |
| title_short | Influence of mesoscale eddies on the cross-shelf phosphate transport of the Kuroshio Current northeast of Taiwan: A modeling study |
| title_sort | influence of mesoscale eddies on the cross shelf phosphate transport of the kuroshio current northeast of taiwan a modeling study |
| topic | cross-shelf transport Kuroshio Current mesoscale eddy phosphate numerical simulation |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.1079418/full |
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