The onshore intrusion of Kuroshio subsurface water from February to July and a mechanism for the intrusion variation

Yang, Dezhou; Yin, Baoshu; Chai, Fei; Feng, Xingru; Xue, Huijie; Gao, Guandong; Yu, Fei

doi:10.1016/j.pocean.2018.08.004

Cited by 55 publications

(53 citation statements)

References 39 publications

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“…High levels of chlorophyll‐ a have been mainly observed in the coastal waters affected by the freshwater discharge of the Changjiang River (Wang et al, ). Meanwhile, NKBC, which constitutes the bottom component of TWC, reaches the coastal waters adjacent to the Changjiang River estuary every spring (Li, Shi, et al, ; Yang et al, ; Zhao et al, ). The interactions of these two major hydrodynamic processes influence the hydrological and chemical conditions of the algal bloom area and, in turn, affect the dynamics of microalgal blooms.…”

Section: Discussionmentioning

confidence: 99%

“…These processes led to the decline of the diatom bloom and left an opening niche for the growth of dinoflagellates. Both numerical simulation results and field investigation data suggest that NKBC start to emerge in the coastal area adjacent to the Changjiang River estuary from April (Yang et al, ), but the prevailing wind and currents are not favorable for the formation of coastal upwelling until early summer (Shi et al, ; Wang & Wang, ). Therefore, the impacts of Kuroshio intrusion on the surface layer are less significant at the stage of diatom blooms, and the Changjiang River discharge has more significant impacts on the diatom bloom through the formation of strong pycnocline and the rich but unbalanced nutrient supply.…”

Section: Discussionmentioning

confidence: 99%

“…The dinoflagellate bloom mainly occurs in the CCW, suggesting that Changjiang River discharge still plays an important role on the dinoflagellate bloom. Meanwhile, the intrusion of phosphate‐rich Kuroshio waters through NKBC intensifies during this stage (Yang et al, ). Strong NKBC intrusion and summer monsoon lead to strong upwelling (Wang & Wang, ; Wu, ), particularly in the northern part of the study area, and the gradual mixing of phosphate‐rich bottom water into the surface.…”

Section: Discussionmentioning

confidence: 99%

“…Potential impacts of Kuroshio intrusion on the environmental conditions and ecological processes in the coastal area adjacent to the Changjiang River estuary have been extensively studied. Yang et al () found that Kuroshio intrusion through NKBC exhibited strong seasonal variation and could reach this area in April. The NKBC is rich in nutrients and has a relatively high molar ratio of P/N (Zhang, Liu, Ren, et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Impacts of Changjiang River Discharge and Kuroshio Intrusion on the Diatom and Dinoflagellate Blooms in the East China Sea

Zhou

Sun

et al. 2019

JGR Oceans

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The coastal area adjacent to the Changjiang River estuary is a high‐risk region for harmful algal blooms. Both Changjiang River discharge and Kuroshio intrusion influence the hydrological conditions and nutrient composition in this area which could affect the onset of diatom and dinoflagellate blooms. However, current understandings on their roles in regulating different microalgal blooms are limited. In this study, changes in stratification, water masses, and the ratio of phosphorus to nitrogen were examined during the diatom and dinoflagellate blooms in 2005 using ship cruise data. The observations showed that both the diatom and dinoflagellate blooms occurred in the continental coastal water. By enhancing the pycnocline and phosphorus stress, the Changjiang diluted water plays an important role in affecting the diatom bloom. The dinoflagellate bloom is partly supported by the supply of phosphate transported by Kuroshio intrusion and upwelling. The results of this study will help elucidate the mechanisms of large‐scale harmful algal blooms in the coastal area adjacent to the Changjiang River estuary.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impacts of Changjiang River Discharge and Kuroshio Intrusion on the Diatom and Dinoflagellate Blooms in the East China Sea

Zhou

Sun

et al. 2019

JGR Oceans

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“…Though this process can link the movement of the Kuroshio axis to the change of ECS chlorophyll, it is still not clear why the variation of the Kuroshio causes phosphate transport into the coastal area. According to the topographic beta spiral theory (Yang et al, 2018b), the Kuroshio intrusion depends on the velocity angle (…”

Section: Possible Mechanism For Mic Kipt Influence On Ecs Chlorophyllmentioning

confidence: 99%

Boundary Phosphate Transport of the East China Sea and Its Influence on Biological Process

Lin¹,

Wang²,

Xiu³

et al. 2019

GEP

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The East China Sea (ECS) is one of the largest marginal seas in the Northwest Pacific, and also one of the most productive regions of the global ocean. Using a three-dimensional Pacific physical-biological model, we investigate the interannual variation of phosphate transport via Kuroshio intrusion (KIPT) in the eastern boundary of the East China Sea (ECS) and its influence on the ECS biological process during 1997 to 2016. The KIPT into the ECS mainly occurs in the northeast of Taiwan and southwest of Kyushu, with stronger interannual variability in the northeast of Taiwan. The variation of the KIPT is more significant in the near-bottom water, and is dominated by volume transport. On the interannual timescale, the KIPT changes in response to the shift of the Kuroshio axis and to the bottom upwelling in the ECS eastern boundary. When the Kuroshio axis is closer to (farther away from) the ECS shelf, the strength of the bottom upwelling increases (decreases). This process induces more (less) significant topographic beta spiral, which causes an anticyclonic (cyclonic) eddy-like bottom velocity feature in the northeast of Taiwan. Eventually, more phosphate is transported to the ECS inner shelf, which increases chlorophyll concentration around the Zhoushan Islands and Yangtze Estuary but reduces chlorophyll concentration in the ECS outer shelf. Conversely, the chlorophyll increases in the ECS outer shelf but decreases around the Zhoushan Islands and Yangtze Estuary when there is less phosphate transport. This study highlights the importance of Kuroshio intrusion in connecting the inner and outer shelves of the ECS on the interannual timescale. Phosphate transport into the East China Sea via Kuroshio intrusion shows

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Front-Driven Physical–Biogeochemical–Ecological Interactions in the Yellow Sea Large Marine Ecosystem

Sun

et al. 2022

The Handbook of Environmental Chemistry

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The onshore intrusion of Kuroshio subsurface water from February to July and a mechanism for the intrusion variation

Cited by 55 publications

References 39 publications

Impacts of Changjiang River Discharge and Kuroshio Intrusion on the Diatom and Dinoflagellate Blooms in the East China Sea

Impacts of Changjiang River Discharge and Kuroshio Intrusion on the Diatom and Dinoflagellate Blooms in the East China Sea

Boundary Phosphate Transport of the East China Sea and Its Influence on Biological Process

Front-Driven Physical–Biogeochemical–Ecological Interactions in the Yellow Sea Large Marine Ecosystem

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