Datasets referring to the paper titled 'Impacts of simulated coastal ocean alkalinity enhancement on the seasonal carbon cycle in European waters under a low- and a high-emission scenario'

One potentially scalable method to remove CO2 from the air is ocean alkalinity enhancement (OAE), which works to lower the ocean’s CO2 partial pressure (pCO2) and accelerate CO2 sequestration and durable storage. This study explores how OAE might affect the seasonal carbon cycle, which plays a key role in the ocean’s annual CO2 uptake. By analysing Earth System Model simulations of OAE implemented continuously at the European coastline under low and high emissions, it was found that: (a) due to surface alkalinity retention, OAE reduces ocean pCO2 most strongly in summer, turning the region into a year-round carbon sink; (b) the strongest air-sea CO2 uptake enhancement takes place in winter; (c) the ocean’s carbon sink is increased more strongly in SSP3-7.0 than in SSP1-2.6 due to a lower buffering capacity.