Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific
Abstract Oceanic subsurface eddies are believed to potentially impact biogeochemical cycles; however, our understanding remains limited due to sparse in situ observations. This study presents observation of an intrathermocline eddy (ITE) in the tropical western North Pacific and provides a comprehen...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-07-01
|
| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL113616 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850039163081981952 |
|---|---|
| author | Zhendong Hu Zhiyu Liu Xin Liu Takako Masuda Takuhei Shiozaki Hiroyuki Yamada Hongyang Lin Bangqin Huang Ken Furuya |
| author_facet | Zhendong Hu Zhiyu Liu Xin Liu Takako Masuda Takuhei Shiozaki Hiroyuki Yamada Hongyang Lin Bangqin Huang Ken Furuya |
| author_sort | Zhendong Hu |
| collection | DOAJ |
| description | Abstract Oceanic subsurface eddies are believed to potentially impact biogeochemical cycles; however, our understanding remains limited due to sparse in situ observations. This study presents observation of an intrathermocline eddy (ITE) in the tropical western North Pacific and provides a comprehensive analysis of how ITE modulate nutrient dynamics by both diapycnal mixing and lateral transport. Pronounced upward nutrient fluxes were observed within the deep chlorophyll maximum layer due to ITE‐induced mixing. Lateral transport directly influenced nutrient concentrations through isopycnal advection and indirectly by regulating the horizontal distribution of sinking particles. The latter likely induced spatial variability in mineralization, which played a dominant role in shaping nutrient enrichment. This study advances our understanding of the biogeochemical impacts of ITE, presenting a new paradigm for their role in nutrient and carbon cycling in oligotrophic oceans. |
| format | Article |
| id | doaj-art-bcdace53d2e24bcba5a65d3a42842e40 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bcdace53d2e24bcba5a65d3a42842e402025-08-20T02:56:24ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015213n/an/a10.1029/2024GL113616Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North PacificZhendong Hu0Zhiyu Liu1Xin Liu2Takako Masuda3Takuhei Shiozaki4Hiroyuki Yamada5Hongyang Lin6Bangqin Huang7Ken Furuya8State Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaGraduate School of Agricultural and Life Sciences the University of Tokyo Tokyo JapanGraduate School of Agricultural and Life Sciences the University of Tokyo Tokyo JapanMeteorological Laboratory University of the Ryukyus Okinawa JapanState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaState Key Laboratory of Marine Environmental Science Xiamen University Xiamen ChinaGraduate School of Agricultural and Life Sciences the University of Tokyo Tokyo JapanAbstract Oceanic subsurface eddies are believed to potentially impact biogeochemical cycles; however, our understanding remains limited due to sparse in situ observations. This study presents observation of an intrathermocline eddy (ITE) in the tropical western North Pacific and provides a comprehensive analysis of how ITE modulate nutrient dynamics by both diapycnal mixing and lateral transport. Pronounced upward nutrient fluxes were observed within the deep chlorophyll maximum layer due to ITE‐induced mixing. Lateral transport directly influenced nutrient concentrations through isopycnal advection and indirectly by regulating the horizontal distribution of sinking particles. The latter likely induced spatial variability in mineralization, which played a dominant role in shaping nutrient enrichment. This study advances our understanding of the biogeochemical impacts of ITE, presenting a new paradigm for their role in nutrient and carbon cycling in oligotrophic oceans.https://doi.org/10.1029/2024GL113616 |
| spellingShingle | Zhendong Hu Zhiyu Liu Xin Liu Takako Masuda Takuhei Shiozaki Hiroyuki Yamada Hongyang Lin Bangqin Huang Ken Furuya Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific Geophysical Research Letters |
| title | Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific |
| title_full | Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific |
| title_fullStr | Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific |
| title_full_unstemmed | Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific |
| title_short | Nutrient Dynamics Modulated by Diapycnal Mixing and Particle Sinking Pathways Within an Intrathermocline Eddy in the Tropical Western North Pacific |
| title_sort | nutrient dynamics modulated by diapycnal mixing and particle sinking pathways within an intrathermocline eddy in the tropical western north pacific |
| url | https://doi.org/10.1029/2024GL113616 |
| work_keys_str_mv | AT zhendonghu nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT zhiyuliu nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT xinliu nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT takakomasuda nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT takuheishiozaki nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT hiroyukiyamada nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT hongyanglin nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT bangqinhuang nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific AT kenfuruya nutrientdynamicsmodulatedbydiapycnalmixingandparticlesinkingpathwayswithinanintrathermoclineeddyinthetropicalwesternnorthpacific |