Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction
The short-term variabilities in temperature, salinity, nitrate, chlorophyll a (Chl a), and carbonate chemistry data (i.e., pH, partial pressure of CO2 (pCO2), total alkalinity, and dissolved inorganic carbon) were concurrently investigated in the shallow (∼50 m) and deep (∼300 m) water areas around...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-06-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmars.2020.00511/full |
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| author | Jen-Hua Tai Wen-Chen Chou Wen-Chen Chou Chin-Chang Hung Kuan-Chieh Wu Ying-Hsuan Chen Tzong-Yueh Chen Gwo-Ching Gong Gwo-Ching Gong Fuh-Kwo Shiah Fuh-Kwo Shiah Chun Hoe Chow |
| author_facet | Jen-Hua Tai Wen-Chen Chou Wen-Chen Chou Chin-Chang Hung Kuan-Chieh Wu Ying-Hsuan Chen Tzong-Yueh Chen Gwo-Ching Gong Gwo-Ching Gong Fuh-Kwo Shiah Fuh-Kwo Shiah Chun Hoe Chow |
| author_sort | Jen-Hua Tai |
| collection | DOAJ |
| description | The short-term variabilities in temperature, salinity, nitrate, chlorophyll a (Chl a), and carbonate chemistry data (i.e., pH, partial pressure of CO2 (pCO2), total alkalinity, and dissolved inorganic carbon) were concurrently investigated in the shallow (∼50 m) and deep (∼300 m) water areas around Dongsha Atoll of the northern South China Sea (NSCS). The results show that surface temperature and pCO2 were lower but that upward nitrate flux and Chl a were higher in the upper euphotic zone at the shallow-water area than those at the deep-water area. We suggest that the observed contrasting biogeochemical properties between the two areas could be attributed to the impact of topography-flow interaction. As tidal currents (or any other horizontal currents) interacted with the shallow topography, they may induce vertical isotherm displacements (e.g., internal tides/internal waves) that may enhance turbulent mixing, and thus can transport more nutrient-replete subsurface water into the euphotic zone and stimulate phytoplankton production. The stimulated biological production and the cooling effect induced by topography-flow interaction may collectively drive surface pCO2 down in the shallow water area. Though the present short-term hydrological and CO2 data, which to our knowledge were concurrently investigated for the first time in the NSCS, reveal that the topography-flow interaction could be a favorable mechanism for atmospheric CO2 uptake around Dongsha Atoll, more long-term observations are still needed to confirm that the similar processes can repetitively take place in topography-flow interaction prevalent areas. |
| first_indexed | 2024-12-18T10:16:27Z |
| format | Article |
| id | doaj.art-e5ef9279cfaa430fa20c7c1bb83c226e |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-12-18T10:16:27Z |
| publishDate | 2020-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-e5ef9279cfaa430fa20c7c1bb83c226e2022-12-21T21:11:17ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452020-06-01710.3389/fmars.2020.00511513425Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow InteractionJen-Hua Tai0Wen-Chen Chou1Wen-Chen Chou2Chin-Chang Hung3Kuan-Chieh Wu4Ying-Hsuan Chen5Tzong-Yueh Chen6Gwo-Ching Gong7Gwo-Ching Gong8Fuh-Kwo Shiah9Fuh-Kwo Shiah10Chun Hoe Chow11Research Center for Environmental Changes, Academia Sinica, Taipei, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanCenter of Excellence for the Oceans, National Taiwan Ocean University, Keelung, TaiwanDepartment of Oceanography, National Sun Yat-sen University, Kaohsiung, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanCenter of Excellence for the Oceans, National Taiwan Ocean University, Keelung, TaiwanResearch Center for Environmental Changes, Academia Sinica, Taipei, TaiwanInstitute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, TaiwanDepartment of Marine Environmental Informatics, National Taiwan Ocean University, Keelung, TaiwanThe short-term variabilities in temperature, salinity, nitrate, chlorophyll a (Chl a), and carbonate chemistry data (i.e., pH, partial pressure of CO2 (pCO2), total alkalinity, and dissolved inorganic carbon) were concurrently investigated in the shallow (∼50 m) and deep (∼300 m) water areas around Dongsha Atoll of the northern South China Sea (NSCS). The results show that surface temperature and pCO2 were lower but that upward nitrate flux and Chl a were higher in the upper euphotic zone at the shallow-water area than those at the deep-water area. We suggest that the observed contrasting biogeochemical properties between the two areas could be attributed to the impact of topography-flow interaction. As tidal currents (or any other horizontal currents) interacted with the shallow topography, they may induce vertical isotherm displacements (e.g., internal tides/internal waves) that may enhance turbulent mixing, and thus can transport more nutrient-replete subsurface water into the euphotic zone and stimulate phytoplankton production. The stimulated biological production and the cooling effect induced by topography-flow interaction may collectively drive surface pCO2 down in the shallow water area. Though the present short-term hydrological and CO2 data, which to our knowledge were concurrently investigated for the first time in the NSCS, reveal that the topography-flow interaction could be a favorable mechanism for atmospheric CO2 uptake around Dongsha Atoll, more long-term observations are still needed to confirm that the similar processes can repetitively take place in topography-flow interaction prevalent areas.https://www.frontiersin.org/article/10.3389/fmars.2020.00511/fulltopography-flow interactioninternal tidesinternal wavescarbon dioxidechlorophyll-anutrients |
| spellingShingle | Jen-Hua Tai Wen-Chen Chou Wen-Chen Chou Chin-Chang Hung Kuan-Chieh Wu Ying-Hsuan Chen Tzong-Yueh Chen Gwo-Ching Gong Gwo-Ching Gong Fuh-Kwo Shiah Fuh-Kwo Shiah Chun Hoe Chow Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction Frontiers in Marine Science topography-flow interaction internal tides internal waves carbon dioxide chlorophyll-a nutrients |
| title | Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction |
| title_full | Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction |
| title_fullStr | Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction |
| title_full_unstemmed | Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction |
| title_short | Short-Term Variability of Biological Production and CO2 System Around Dongsha Atoll of the Northern South China Sea: Impact of Topography-Flow Interaction |
| title_sort | short term variability of biological production and co2 system around dongsha atoll of the northern south china sea impact of topography flow interaction |
| topic | topography-flow interaction internal tides internal waves carbon dioxide chlorophyll-a nutrients |
| url | https://www.frontiersin.org/article/10.3389/fmars.2020.00511/full |
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