Marine carbon dioxide removal (mCDR) aims to use the ocean's natural capacity to absorb CO2. Techniques include adding alkaline minerals like limestone to seawater to reduce acidity and increase carbon uptake, as well as enhancing the biological carbon pump by supporting photosynthetic microorganisms. Scaling these technologies requires precise measurement to verify that carbon is stored long-term rather than briefly cycled. Researchers are deploying mass spectrometers and specialized tools to monitor seawater chemistry and ensure these interventions do not disrupt marine ecosystems.
