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首页> 外文期刊>Marine Chemistry >Inclusion of uncertainty in the calcium-salinity relationship improves estimates of ocean acidification monitoring data quality
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Inclusion of uncertainty in the calcium-salinity relationship improves estimates of ocean acidification monitoring data quality

机译：将不确定性纳入盐度关系中的不确定性改善了海洋酸化监测数据质量的估计

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The effects of Ocean Acidification (OA) and the resulting decrease of CaCO3 saturation state (Omega) on marine organisms and biogeochemistry are observed through regionally dispersed monitoring programs. The standard of data collected by these programs is assessed based on the computed propagated uncertainties of [CO32-], with data quality regulated by thresholds defined by the Global Ocean Acidification Observing Network (GOA-ON). While these thresholds account for the adoption of lower-cost methods and technologies for carbonate parameter analysis (e.g. pH and total alkalinity), the impacts of salinity measurement and calcium concentration uncertainty on data quality are poorly understood. Currently, the publicly available marine carbonate chemistry uncertainty packages do propagate salinity uncertainty, but do not include [Ca2+] uncertainty. In this study, the uncertainty propagation methods in the R-based seacarb package were extended to include [Ca2+] uncertainty, and subsequently employed to examine the effects of uncertainty in salinity and [Ca2+] on carbonate system calculations. The results indicate that underestimation of uncertainty in [Ca2+] is of primary concern in variable coastal waters, where relatively small ( 4%) deviations from the global [Ca2+] -salinity relationship leads to GOA-ON's quality standards being exceeded. In contrast, the uncertainty in salinity has a relatively minor impact on uncertainty in [CO32-] and Omega. Given the importance of Omega and its sensitivity to [Ca2+], coastal OA monitoring programs should consider whether their region conforms with the global [Ca2+] -salinity relationship, and if uncertain should directly measure [Ca2+] when calculating Omega.
机译：通过区域分散的监测计划观察海洋酸化（OA）和所得CaCO3饱和状态（OMEGA）对海洋生物和生物地球化学的影响。根据这些程序收集的数据标准，基于[CO32-]的计算传播的不确定性，具有由全球海洋酸化观察网络（GOA-ON）定义的阈值调节的数据质量。虽然这些阈值用于采用碳酸酯参数分析的低成本方法和技术（例如pH和总碱度），但盐度测量和钙浓度不确定对数据质量的影响很差。目前，公开可用的海洋碳酸化学不确定包确实繁殖盐度不确定性，但不包括[Ca2 +]不确定性。在该研究中，基于R的Seacarb包装中的不确定繁殖方法扩展到包括[Ca2 +]不确定性，随后用于检查盐度和[Ca2 +]对碳酸盐体系计算的影响的影响。结果表明，在可变沿海水域中低估了不确定性在可变沿海水域中的主要关注，其中与全球[CA2 +] - 叠加关系的偏差相对较小（<4％）导致GOA-ON的质量标准。相比之下，盐度的不确定性对[CO32-]和Omega的不确定性产生了相对轻微的影响。鉴于Omega的重要性及其对[CA2 +]的敏感性，沿海OA监测计划应考虑它们的区域是否符合全局[CA2 +] - 叠加关系，如果不确定在计算ω时应直接测量[CA2 +]。

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