Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011

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	Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011
	Zhai WeiDong ; Zhao HuaDe ; Zheng Nan ; Xu Yi ; Zhai WD(翟惟东)
刊名	http://dx.doi.org/10.1007/s11434-011-4949-2
	2012-03
关键词	OCEAN ACIDIFICATION HYPOXIA CONSEQUENCES TEMPERATURE THRESHOLDS ESTUARY PH
英文摘要	National Basic Research Program of China [2009CB421204]; National Natural Science Foundation of China (NSFC) [41076044, 40876040]; NSFC [41049901]; State Oceanic Administration of China [DOMEP-MEA-01-10]; Dissolved oxygen (DO) and pH in the central part of the Bohai Sea were surveyed in late June and late August, 2011. During the June cruise, the bottom DO was in the range of 215-290 mu mol-O-2 kg(-1) (i.e. 85%-115% of the saturation level), and the bottom pH was in the range of 7.82-8.04 on the total-hydrogen-ion scale. In August, however, both the bottom DO and the pH had significantly declined in the northwestern-northern near-shore areas, where the water depth was no more than 35 m. The lowest bottom DO was 100-110 mu mol-O-2 kg(-1) (only 44%-47% of the June DO values) in the northern near-shore area, where the bottom pH was 7.64-7.68 on the total-hydrogen-ion scale (0.16-0.20 units lower than the June pH value). The largest decreases in DO and in pH were observed in the northwestern near-shore bottom waters, corresponding to declines of 170 mu mol-O-2 kg(-1) (as high as 59% of the June DO value) and 0.29 pH units, respectively. The greatest pH decline of 0.29 pH units meant that the total-hydrogen-ion concentration doubled in the bottom waters from June to August. Based on field measurements of bottom DO/pH combined with a simplified model simulation, we suggest that respiration/remineralization-derived CO2 increased the acidity in the bottom oxygen-depleted waters of northwestern-northern near-shore areas in the Bohai Sea as a result of coastal red tides and/or marine aquaculture. This aquatic chemistry is suggested to be partially responsible for scallop-breeding failures in the northwestern Bohai Sea in summer 2011.
语种	英语
出版者	CHINESE SCI BULL
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87734]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Zhai WeiDong,Zhao HuaDe,Zheng Nan,et al. Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011[J]. http://dx.doi.org/10.1007/s11434-011-4949-2,2012.
APA	Zhai WeiDong,Zhao HuaDe,Zheng Nan,Xu Yi,&翟惟东.(2012).Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011.http://dx.doi.org/10.1007/s11434-011-4949-2.
MLA	Zhai WeiDong,et al."Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011".http://dx.doi.org/10.1007/s11434-011-4949-2 (2012).