Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary
Ocean acidification (OA) occurs universally in the world’s oceans. Marginal seas are facing more serious OA than the open ocean due to strong anthropogenic and natural impacts. This study investigates carbonate dynamics on the East China Sea (ECS) shelf off the Changjiang Estuary using field observa...
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ftdoajarticles:oai:doaj.org/article:1c860643a2cb47ee8c868cd16c2a7deb 2023-05-15T17:50:03+02:00 Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary Xianghui Guo Zhentong Yao Ying Gao Yaohua Luo Yi Xu Weidong Zhai 2021-12-01T00:00:00Z https://doi.org/10.3389/fmars.2021.770034 https://doaj.org/article/1c860643a2cb47ee8c868cd16c2a7deb EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.770034/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.770034 https://doaj.org/article/1c860643a2cb47ee8c868cd16c2a7deb Frontiers in Marine Science, Vol 8 (2021) East China Sea Shelf ocean acidification seasonal variability pH saturation state Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.770034 2022-12-31T11:03:43Z Ocean acidification (OA) occurs universally in the world’s oceans. Marginal seas are facing more serious OA than the open ocean due to strong anthropogenic and natural impacts. This study investigates carbonate dynamics on the East China Sea (ECS) shelf off the Changjiang Estuary using field observations made from 2015 to 2019 that cover all four seasons. In the low productivity cold seasons, the water was well-mixed vertically. The coastal area and the northern ECS were occupied by water characterized by high dissolved inorganic carbon (DIC), low pH25 (pH at 25°C), and low ΩAr (saturation state index of aragonite), and influenced by the coastal water from the Yellow Sea (YS). However, during highly productive warm seasons, pH25 and ΩAr increased in the surface water but decreased in the bottom water as a result of strong biological DIC uptake in the surface water and CO2 production by strong organic matter remineralization in the bottom water. Strong remineralization decreased pH25 and ΩAr by 0.18 ± 0.08 and 0.73 ± 0.35 in the hypoxic bottom water in summer, even though the bottom water remained oversaturated with respect to aragonite (ΩAr > 1.0) during the surveys. Under the context of global OA and the strong seasonal acidification, the projected bottom water on the ECS shelf will be corrosive for aragonite by mid-century. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
East China Sea Shelf ocean acidification seasonal variability pH saturation state Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
East China Sea Shelf ocean acidification seasonal variability pH saturation state Science Q General. Including nature conservation geographical distribution QH1-199.5 Xianghui Guo Zhentong Yao Ying Gao Yaohua Luo Yi Xu Weidong Zhai Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
topic_facet |
East China Sea Shelf ocean acidification seasonal variability pH saturation state Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Ocean acidification (OA) occurs universally in the world’s oceans. Marginal seas are facing more serious OA than the open ocean due to strong anthropogenic and natural impacts. This study investigates carbonate dynamics on the East China Sea (ECS) shelf off the Changjiang Estuary using field observations made from 2015 to 2019 that cover all four seasons. In the low productivity cold seasons, the water was well-mixed vertically. The coastal area and the northern ECS were occupied by water characterized by high dissolved inorganic carbon (DIC), low pH25 (pH at 25°C), and low ΩAr (saturation state index of aragonite), and influenced by the coastal water from the Yellow Sea (YS). However, during highly productive warm seasons, pH25 and ΩAr increased in the surface water but decreased in the bottom water as a result of strong biological DIC uptake in the surface water and CO2 production by strong organic matter remineralization in the bottom water. Strong remineralization decreased pH25 and ΩAr by 0.18 ± 0.08 and 0.73 ± 0.35 in the hypoxic bottom water in summer, even though the bottom water remained oversaturated with respect to aragonite (ΩAr > 1.0) during the surveys. Under the context of global OA and the strong seasonal acidification, the projected bottom water on the ECS shelf will be corrosive for aragonite by mid-century. |
format |
Article in Journal/Newspaper |
author |
Xianghui Guo Zhentong Yao Ying Gao Yaohua Luo Yi Xu Weidong Zhai |
author_facet |
Xianghui Guo Zhentong Yao Ying Gao Yaohua Luo Yi Xu Weidong Zhai |
author_sort |
Xianghui Guo |
title |
Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
title_short |
Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
title_full |
Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
title_fullStr |
Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
title_full_unstemmed |
Seasonal Variability and Future Projection of Ocean Acidification on the East China Sea Shelf off the Changjiang Estuary |
title_sort |
seasonal variability and future projection of ocean acidification on the east china sea shelf off the changjiang estuary |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.770034 https://doaj.org/article/1c860643a2cb47ee8c868cd16c2a7deb |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.770034/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.770034 https://doaj.org/article/1c860643a2cb47ee8c868cd16c2a7deb |
op_doi |
https://doi.org/10.3389/fmars.2021.770034 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
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1766156641382694912 |