Determination of spatial and temporal variability of pH and dissolved oxygen concentrations in a seasonally hypoxic semi-enclosed marine basin using continuous monitoring
Determination of spatial and temporal variability of pH and dissolved oxygen concentrations in a seasonally hypoxic semi-enclosed marine basin using continuous monitoring
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使用连续监测确定季节性缺氧半封闭海洋盆地 pH 值和溶解氧浓度的空间和时间变化
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
F. Regan
中科院分区：
文献类型：
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作者：
T. Sullivan;C. Byrne;L. Harman;J. Davenport;R. McAllen;F. Regan
测量和预测海洋酸化对近岸海洋生态系统的影响是目前气候变化研究的一个主要目标。本研究探讨了规模的pH值的变化在两个表面沃茨（<10米深）和更深的沃茨与局部季节性缺氧超过两年在海恩湖海洋保护区，科克，爱尔兰。海恩湖是一个半封闭的海洋系统，经历局部季节性（大约每年5月至9月）缺氧，并最终缺氧低于约25米的深度，主要是由于其水深剖面。我们报告的pH值和其他环境参数，如溶解氧（DO）和温度在这个位置之间的关系，我们提供的数据，使用连续的自主传感技术，这表明，pH值测量的变化在海恩湖海洋保护区的沃茨是未来海洋酸化的预测相媲美。这是有意义的，因为在海洋沃茨中直接测量的pH值时间序列相对较少，另外，第一次pH值测量是在60多年前的1952年从海恩湖报道的。这项工作还首次测量了与从缺氧到常氧的过渡相关的陡峭化学梯度，这些化学梯度导致了海恩湖pH值的深刻变化，从而深入了解了海洋生物在这些地点所经历的pH值的自然变化。
Measurement and prediction of ocean acidification effects for nearshore marine ecosystems is currently a major objective of climate change research. This study examines the scales of pH variability in both surface waters (<10 m depth) and deeper waters associated with localised seasonal hypoxia over two years at Lough Hyne marine reserve, Cork, Ireland. Lough Hyne, a semi-enclosed marine system, experiences localised seasonal (approximately May to September each year) hypoxia and eventual anoxia below a depth of circa 25 m, due largely to its bathymetric profile. We report the relationships between pH and other environmental parameters such as dissolved oxygen (DO) and temperature at this location, and we provide data, obtained using continuous autonomous sensing technology, which demonstrates that the variability in pH measurements in the waters of Lough Hyne marine reserve are comparable to predictions of future ocean acidification. This is of interest as comparatively few directly measured time series of pH in marine waters are reported, and additionally the first pH measurements were reported from Lough Hyne over 6 decades ago in 1952. This work also measures for the first time the steep chemical gradients associated with the transition from anoxia to normoxia that result in profound pH changes at Lough Hyne, providing insight into natural variability in pH experienced by marine organisms at such locations.