Preprints
https://doi.org/10.5194/egusphere-2024-692
https://doi.org/10.5194/egusphere-2024-692
12 Mar 2024
 | 12 Mar 2024

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

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

Abstract. 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.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-692', Anonymous Referee #1, 16 Apr 2024
    • AC1: 'Reply on RC1', Lennart Bach, 23 May 2024
    • AC2: 'Reply on RC1', Lennart Bach, 23 May 2024
  • RC2: 'Comment on egusphere-2024-692', Anonymous Referee #2, 17 Apr 2024
    • AC3: 'Reply on RC2', Lennart Bach, 23 May 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-692', Anonymous Referee #1, 16 Apr 2024
    • AC1: 'Reply on RC1', Lennart Bach, 23 May 2024
    • AC2: 'Reply on RC1', Lennart Bach, 23 May 2024
  • RC2: 'Comment on egusphere-2024-692', Anonymous Referee #2, 17 Apr 2024
    • AC3: 'Reply on RC2', Lennart Bach, 23 May 2024
Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz
Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz

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Short summary
Ocean Alkalinity Enhancement (OAE) is an emerging marine CO2 removal method but its environmental effects are insufficiently understood. The OAE Pelagic Impact Intercomparison Project (OAEPIIP) provides funding for a standardized and globally replicated microcosm experiment to study the effects of OAE on plankton communities. Here, we provide a detailed manual on the OAEPIIP experiment. We expect OAEPIIP to help build scientific consensus on the effects of OAE on plankton.