Colloquium Hot Topics: Jean-Pierre Gattuso


Ocean based measures for climate action

Within the IMAU colloquium series a special series is embedded called “Hot Topics in Climate”. This year the series will be devoted to the carbon cycle and geo-engineering. 

In this series we start with a ca 15-minute introduction by an international expert on the topic, which can be a bit provocative emphasizing points where scientists still disagree, or where the science is still controversial, followed by 45 minutes of open discussion. 

Our first speaker is Jean-Pierre Gattuso who will discuss “Ocean based solution to climate change

Jean-Pierre is research director at the Laboratoire d'Océanographie de Villefranche, CNRS, and Sorbonne University. His main research activity relates to the cycling of carbon and carbonate in coastal ecosystems. More recently, he focused on the response of marine organisms and ecosystems to climate change and ocean acidification. He was e.g., the Scientific Coordinator of the EPOCA (European Project on Ocean Acidification). Recently he assessed ocean-based solutions to climate change and its impact under the umbrella of The Ocean Solutions Initiative) which is the first hot topic we present in this series. 


The effectiveness, feasibility, duration of effects, co-benefits, disbenefits, cost effectiveness and governability of four ocean-based negative emissions technologies (NETs) are assessed in comparison to eight other ocean-based measures. Their role in revising UNFCCC Parties’ future Nationally Determined Contributions is discussed in the broad context of ocean-based actions for both mitigation and ecological adaptation. All measures are clustered in three policy-relevant categories (Decisive, Low Regret, Concept Stage). None of the ocean-based NETs assessed are identified as Decisive at this stage. One is Low Regret (Restoring and increasing coastal vegetation), and three are at Concept Stage, one with low to moderate potential disbenefits (Marine bioenergy with carbon capture and storage) and two with potentially high disbenefits (Enhancing open-ocean productivity and Enhancing weathering and alkalinization). Ocean-based NETs are uncertain but potentially highly effective. They have high priority for research and development.

Gattuso J.-P., Williamson P., Duarte C. & Magnan A. K., in press. The potential for ocean-based climate action: negative emissions technologies and beyond. Frontiers in Climate.

Start date and time
End date and time