The contribution of low temperature and biological activities to the CO2 sink in Jiaozhou Bay during winter

Zang, Han; Li, Yunxiao; Xue, Liang; Liu, Xiangyu; Zhang, Longjun

doi:10.1016/j.jmarsys.2018.05.008

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…Similarly, temperature also showed a significant negative correlation with DIC (p < 0.05, n = 22), but a positive correlation with Ω A @ in situ (p < 0.01, n = 22) in Area II, and their correlation was more significant than that in Area I (Figure 5A), which explained 48% and 60% of DIC and Ω A @ in situ variability. However, pH T @ in situ and pCO 2 @ in situ were not significantly correlated with temperature, suggesting the influence of other processes [21,60,61].…”

Section: General Characteristics Of Carbonate Systemmentioning

confidence: 88%

Multiple Factors Driving Carbonate System in Subtropical Coral Community Environments along Dapeng Peninsula, South China Sea

et al. 2023

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Coral reef ecosystems have extremely high primary productivity and play an important role in the marine carbon cycle. However, due to the high carbon metabolism efficiency of coral communities, little is known about the carbon sink–source properties of coral reefs. In November 2022, in situ field investigations coupled with incubation experiments were conducted in typical subtropical coral reef waters, i.e., Yangmeikeng Sea Area (Area I) and Dalu Bay (Area Ⅱ), to explore the dynamics of the carbonate system and its controlling factors. The results revealed that the carbonate parameters had high variability, comprehensively forced by various physical and biochemical processes. Overall, Areas I and Ⅱ were net sinks of atmospheric CO2, with net uptake fluxes of 1.66 ± 0.40 and 0.99 ± 0.08 mmol C m−2 day−1, respectively. The aragonite saturation state (ΩA), 3.04–3.87, was within the range adequate for growth of tropical shallow-water scleractinian corals. Inorganic carbon budget results indicated that photosynthesis and microbial respiration were the main factors affecting the dynamics of carbonate systems in the whole study area. However, focusing on the reef areas, coral metabolism was also a key factor affecting the carbonate system in seawater (especially in Area I) and its contribution accounted for 28.9–153.3% of the microbial respiration. This study highlighted that metabolism of coral communities could significantly affect the seawater carbonate system, which is of great significance in the context of the current process of ocean acidification.

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Section: General Characteristics Of Carbonate Systemmentioning

confidence: 88%

Multiple Factors Driving Carbonate System in Subtropical Coral Community Environments along Dapeng Peninsula, South China Sea

et al. 2023

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“…Their results indicated that the bay experienced a process of intense organic degradation in autumn and strong primary production in winter, causing the bay from a CO2 source to a sink during the period. Recently, Zang et al (2018) found that the decrease in seawater temperature and enhancement of primary production together resulted in the bay acting as a CO2 sink. However, pCO2 changes throughout the winter and the mechanism for the variation are far from clearly understood.…”

Section: Introductionmentioning

confidence: 99%

The spatiotemporal variation and control mechanism of surface pCO2 in winter in Jiaozhou Bay, China

Yang

Zhang

et al. 2020

Continental Shelf Research

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In many mid-latitude coastal waters during winter months, in addition to temperature, the large change in biogeochemical processes often influence and complicate the surface partial pressure of CO2 (pCO2). Based on the hydrological and carbonate parameters in seven cruises, this study analysed the evolution process and explored the control mechanism of the surface pCO2 in Jiaozhou Bay, China, from December to March. The results showed that the pCO2 ranged from 157 μatm to 647 μatm, and the bay represented a sink for atmospheric CO2 (-3.8 mmol m -2 d -1 ) in the whole winter. The non-temperature processes were the dominant factors affecting intra-winter pCO2 variation. In December, the bay was dominated by aerobic respiration and acted as a CO2 source (3.0 mmol m -2 d -1 ). From early January to late February, however, the vigorous growth of cold algae caused strong primary production, and the bay presented as a CO2 sink (from -6.4 mmol m -2 d -1 in early January to -15.5 mmol m -2 d -1 in late February). In March, primary production weakened and the effects of the CaCO3 precipitation appeared, and the strength of the CO2 sink was obviously weakened (-1.1 mmol m -2 d -1 ). Meanwhile, the water temperature decreased gradually from December to late January and then increased until March, and it further expanded the variation range of pCO2. Our results highlight the obvious source/sink change in mid-latitude seawater CO2 in winter, while more field observations are still needed to further understand the complicated biogeochemical processes and its influence on seawater pCO2.

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Seasonal variation of sea surface pH and its controls in the Jiaozhou Bay, China

Yang

Dang

et al. 2022

Continental Shelf Research

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The contribution of low temperature and biological activities to the CO2 sink in Jiaozhou Bay during winter

Cited by 10 publications

References 32 publications

Multiple Factors Driving Carbonate System in Subtropical Coral Community Environments along Dapeng Peninsula, South China Sea

Multiple Factors Driving Carbonate System in Subtropical Coral Community Environments along Dapeng Peninsula, South China Sea

The spatiotemporal variation and control mechanism of surface pCO2 in winter in Jiaozhou Bay, China

Seasonal variation of sea surface pH and its controls in the Jiaozhou Bay, China

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