Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model
Shallow coastal waters (SCWs) have attracted wide attention in recent years due to their strong carbon sequestration capacity. However, the complex carbon dioxide (CO2) dynamics in the water column makes it difficult to estimate the air–water CO2 fluxes (FCO2) accurately. We developed a numerical mo...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.991802/full |
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| author | Bing Xiong Bing Xiong Shinichiro Yano Katsuaki Komai Naoki Saito Hiroto Komori Baixin Chi Lin Hao Keisuke Nakayama |
| author_facet | Bing Xiong Bing Xiong Shinichiro Yano Katsuaki Komai Naoki Saito Hiroto Komori Baixin Chi Lin Hao Keisuke Nakayama |
| author_sort | Bing Xiong |
| collection | DOAJ |
| description | Shallow coastal waters (SCWs) have attracted wide attention in recent years due to their strong carbon sequestration capacity. However, the complex carbon dioxide (CO2) dynamics in the water column makes it difficult to estimate the air–water CO2 fluxes (FCO2) accurately. We developed a numerical model of CO2 dynamics in water based on field measurements for a typical stratified semi-enclosed shallow bay: the Yatsushiro Sea, Japan. The developed model showed an excellent ability to reproduce the stratification and CO2 dynamics of the Yatsushiro Sea. Through numerical model simulations, we analyzed the annual CO2 dynamics in the Yatsushiro Sea in 2018. The results show that the effect of stratification on the CO2 dynamics in seawater varies greatly depending on the distance from the estuary and the period. In the estuarine region, stratification manifests itself throughout the year by promoting the maintenance of a high partial pressure of CO2 (pCO2) in surface waters, resulting in surface pCO2 being higher than atmospheric pCO2 for up to 40 days during the flood period (average surface pCO2 of 539.94 µatm). In contrast, in areas farther from the estuary, stratification mainly acts to promote the maintenance of high pCO2 in surface waters during periods of high freshwater influence. Then changes to a lower surface pCO2 before the freshwater influence leads towards complete dissipation. Finally, we estimated the FCO2 of the Yatsushiro Sea in 2018, and the results showed that the Yatsushiro Sea was a sink area for atmospheric CO2 in 2018 (−1.70 mmol/m2/day). |
| first_indexed | 2024-04-12T00:57:24Z |
| format | Article |
| id | doaj.art-fc0508e8f3f04a2aad5451df094a075c |
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| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-12T00:57:24Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-fc0508e8f3f04a2aad5451df094a075c2022-12-22T03:54:35ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-10-01910.3389/fmars.2022.991802991802Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological modelBing Xiong0Bing Xiong1Shinichiro Yano2Katsuaki Komai3Naoki Saito4Hiroto Komori5Baixin Chi6Lin Hao7Keisuke Nakayama8Key Laboratory of Urban Safety Risk Monitoring and Early Warning, Tongji University, Shanghai, ChinaMunicipal Engineering Design and Research Institute, Guangzhou Municipal Group Co., Ltd., Guangzhou, ChinaDepartment of Civil Engineering, Kyushu University, Fukuoka, JapanSchool of Earth, Energy and Environmental Engineering, Kitami Institute of Technology, Kitami, JapanGeological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, JapanDepartment of Civil Engineering, Kyushu University, Fukuoka, JapanDepartment of Civil Engineering, Kyushu University, Fukuoka, JapanDepartment of Civil Engineering, Kyushu University, Fukuoka, JapanDepartment of Civil Engineering, Kobe University, Kobe, JapanShallow coastal waters (SCWs) have attracted wide attention in recent years due to their strong carbon sequestration capacity. However, the complex carbon dioxide (CO2) dynamics in the water column makes it difficult to estimate the air–water CO2 fluxes (FCO2) accurately. We developed a numerical model of CO2 dynamics in water based on field measurements for a typical stratified semi-enclosed shallow bay: the Yatsushiro Sea, Japan. The developed model showed an excellent ability to reproduce the stratification and CO2 dynamics of the Yatsushiro Sea. Through numerical model simulations, we analyzed the annual CO2 dynamics in the Yatsushiro Sea in 2018. The results show that the effect of stratification on the CO2 dynamics in seawater varies greatly depending on the distance from the estuary and the period. In the estuarine region, stratification manifests itself throughout the year by promoting the maintenance of a high partial pressure of CO2 (pCO2) in surface waters, resulting in surface pCO2 being higher than atmospheric pCO2 for up to 40 days during the flood period (average surface pCO2 of 539.94 µatm). In contrast, in areas farther from the estuary, stratification mainly acts to promote the maintenance of high pCO2 in surface waters during periods of high freshwater influence. Then changes to a lower surface pCO2 before the freshwater influence leads towards complete dissipation. Finally, we estimated the FCO2 of the Yatsushiro Sea in 2018, and the results showed that the Yatsushiro Sea was a sink area for atmospheric CO2 in 2018 (−1.70 mmol/m2/day).https://www.frontiersin.org/articles/10.3389/fmars.2022.991802/fullcarbon dioxideshallow coastal waters3D numerical modelfield measurementstratificationblue carbon |
| spellingShingle | Bing Xiong Bing Xiong Shinichiro Yano Katsuaki Komai Naoki Saito Hiroto Komori Baixin Chi Lin Hao Keisuke Nakayama Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model Frontiers in Marine Science carbon dioxide shallow coastal waters 3D numerical model field measurement stratification blue carbon |
| title | Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model |
| title_full | Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model |
| title_fullStr | Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model |
| title_full_unstemmed | Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model |
| title_short | Interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters: A preliminary study based on a weekly validated three-dimensional ecological model |
| title_sort | interaction between seawater carbon dioxide dynamics and stratification in shallow coastal waters a preliminary study based on a weekly validated three dimensional ecological model |
| topic | carbon dioxide shallow coastal waters 3D numerical model field measurement stratification blue carbon |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.991802/full |
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