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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 CaCO_3 saturation state (Q) 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 [CO_3~(2-)2], 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 [Ca~(2+)] uncertainty. In this study, the uncertainty propagation methods in the R-based seacarb package were extended to include [Ca~(2+)] uncertainty, and subsequently employed to examine the effects of uncertainty in salinity and [Ca~(2+)] on carbonate system calculations. The results indicate that underestimation of uncertainty in [Ca~(2+)] is of primary concern in variable coastal waters, where relatively small (＜4%) deviations from the global [Ca~(2+)]-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 [CO_3~(2-)] and Ω. Given the importance of Ω and its sensitivity to [Ca~(2+)], coastal OA monitoring programs should consider whether their region conforms with the global [Ca~(2+)]-salinity relationship, and if uncertain should directly measure [Ca~(2+)] when calculating Ω.
机译：通过区域分散的监测计划观察到海洋酸化（OA）和所得Caco_3饱和状态（Q）对海洋生物和生物地球化学降低的影响。基于[CO_3〜（2-）2]的计算传播的不确定性，评估由这些程序收集的数据标准，数据质量由全球海洋酸化观察网络（GOA-ON）定义的阈值调节。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，公开的海洋碳酸化学不确定包繁殖盐度不确定性，但不包括[Ca〜（2+）]不确定性。在该研究中，基于R的Seacarb包装中的不确定性繁殖方法延伸以包括[Ca〜（2+）]不确定性，随后用于检查不确定度在盐度和[Ca〜（2+）]的影响碳酸盐系统计算。结果表明，低估了[Ca〜（2+）]的不确定性在可变沿海水域中是主要关注的，其中来自全球的相对较小的（<4％）偏差[Ca〜（2 +）] - 盐度关系导致GOA-ON的质量标准被超出。相反，盐度的不确定性对[CO_3〜（2-）]和ω的不确定性产生了相对较小的影响。鉴于ω的重要性及其对[CA〜（2+）]的敏感性，沿海OA监测程序应考虑它们的区域是否与全局[CA〜（2 +）] - 盐度关系符合，如果不确定直接测量[ CA〜（2+）]计算Ω时。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2141-2142|共2页
  • 作者

    W.D.N. Dillon; P.W. Dillingham; K.I. Currie; CM. McGraw;

  • 作者单位

    Department of Chemistry NIWA/University of Otago Research Centre for Oceanography University of Otago Dunedin 9016 New Zealand;

    Department of Chemistry NIWA/University of Otago Research Centre for Oceanography University of Otago Dunedin 9016 New Zealand;

    Department of Chemistry NIWA/University of Otago Research Centre for Oceanography University of Otago Dunedin 9016 New Zealand;

    Department of Chemistry NIWA/University of Otago Research Centre for Oceanography University of Otago Dunedin 9016 New Zealand;

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