Technical note: Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project (OAEPIIP)

Authors: Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz

Journal: EGUsphere

Ocean Alkalinity Enhancement (OAE) aims to transfer carbon dioxide (CO₂) from the atmosphere to the ocean by increasing the capacity of seawater to store CO₂. The potential effects of OAE-induced changes in seawater chemistry on marine biology must be assessed to understand if OAE, operated at a climate relevant scale, would be environmentally sustainable. Here, we describe the design of the Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project (OAEPIIP) - a standardised OAE microcosm experiment with plankton communities to be conducted worldwide. OAEPIIP provides funding for participating laboratories to conduct OAE experiments in their local environments. This paper constitutes a detailed manual on the standardised methodology that shall be adopted by all OAEPIIP participants. The individual studies will provide new insights into how plankton communities respond to OAE. The synthesis of these standardized studies, without publication bias, will reveal common OAE-responses that occur across geographic and environmental gradients and are therefore particularly important to determine. The funding available to OAEPIIP and resulting data will be shared to maximise its value and the accessibility. The globally coordinated effort has potential to promote scientific consensus about the potential effects of OAE on diverse plankton communities. Such consensus, through inclusion of the global community, will provide a sounder base to facilitate political decision making whether OAE should be upscaled or not.

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海洋碱度增强旨在通过提高海水储存二氧化碳的能力，将大气中的二氧化碳转移到海洋中。为了了解在气候相关尺度上进行海洋碱度增强是否具有环境可持续性，必须评估海洋碱度增强引起的海水化学变化对海洋生物的潜在影响。本文介绍了海洋碱度增强对浮游生物^[1]影响的比较计划（Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project, OAEPIIP）的设计——在全球范围内对浮游生物群落进行标准化海洋碱度增强微宇宙实验。OAEPIIP为参与的实验室提供资金，以便在其当地环境中进行海洋碱度增强实验。本文形成了一份详细手册，包含了所有OAEPIIP参与者应采用的标准化方法。各项研究将为浮游生物群落对海洋碱度增强的响应提供新的见解。在没有发表偏倚的情况下，这些标准化研究的综合结果将揭示跨越地理和环境梯度发生的常见海洋碱度增强响应，因此确定这些响应尤为重要。OAEPIIP的可用经费和结果数据将被共享，以最大限度地发挥其价值和可获取性。这一全球协调的努力结果有可能促进海洋碱度增强对不同浮游生物群落的潜在影响的科学共识。通过国际社会的参与，这种共识将为推动是否应扩大海洋碱度增强的政治决策提供更坚实的基础。

[1] 译者注：原文为“Pelagic”，此处名称中译为“浮游生物”

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（实习生张郑颖编译）