Processes controlling the aragonite saturation state in the North Yellow Sea near the Yalu River estuary: contrasting river input effects
Understanding the characteristics of the aragonite saturation state (Ω arag ) is necessary for assessing impacts of ocean acidification, especially in coastal oceans. Based upon surveys conducted in August and October 2022, the distribution and controlling processes of Ω arag were investigated in th...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Frontiers Media SA
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3389/fmars.2023.1158896 https://www.frontiersin.org/articles/10.3389/fmars.2023.1158896/full |
Summary: | Understanding the characteristics of the aragonite saturation state (Ω arag ) is necessary for assessing impacts of ocean acidification, especially in coastal oceans. Based upon surveys conducted in August and October 2022, the distribution and controlling processes of Ω arag were investigated in the North Yellow Sea near the Yalu River estuary. Surface water Ω arag values exhibited substantial variations of 1.14 to 3.79 for the input of river-diluted water and community production, whereas bottom water Ω arag values ranged from 1.82 to 2.40 in August. In addition, surface water Ω arag was further reduced to 1.07–2.37 in October due to the combined effects of seawater temperature decreasing and the upwelling of bottom water with low Ω arag values, while Ω arag values lowed to 1.04–2.14 in bottom water. Considerably low Ω arag values during summer and autumn in nearshore areas, especially in the Yalu River estuary, were resulted from the input of river-diluted water, while the net community respiration and remineralization induced the low bottom water Ω arag values in offshore areas. We suggest that integrated and multidisciplinary studies are required to quantify the trends and dynamics of acidification and its synergistic effects on the marine ecosystem in estuarine and coastal oceans. |
---|