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...

Full description

Bibliographic Details
Published in:Frontiers in Marine Science
Main Authors: Xu, Xuemei, Hu, Yingying, He, Zongcai, Wang, Xinyi, Chen, Hong, Han, Jianbo
Other Authors: National Key Research and Development Program of China, National Natural Science Foundation of China
Format: Article in Journal/Newspaper
Language:unknown
Published: Frontiers Media SA 2023
Subjects:
Ocean Engineering
Water Science and Technology
Aquatic Science
Global and Planetary Change
Oceanography
Ocean acidification
Online Access:http://dx.doi.org/10.3389/fmars.2023.1158896
https://www.frontiersin.org/articles/10.3389/fmars.2023.1158896/full
Description
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.

Similar Items