Ocean Alkalinity Enhancement (OAE) is a marine CO2 removal method that uses alkaline material to increase the storage capacity for anthropogenic CO2 in seawater. Kiyas investigated how hydroxide (NaOH) induces taxonomic shifts in plankton. She found: 👇 🌊 onlinelibrary.wiley.com/doi/10.1111/...

📢Just out @globalchangebio.bsky.social: Soil organic carbon (SOC) is key for #enhancedweathering. We found negligible inorganic CO₂ removal, but considerable SOC storage potential. @boitolucilla.bsky.social @arthurvienne.bsky.social @patrickfrings.bsky.social onlinelibrary.wiley.com/doi/10.1111/...

1) No taxonomic shifts could be detected when alkalinity additions (500 umol/kg, i.e. substantial!) are matched with immediate CO2 influx (i.e. pH excursions are minimal). Thus, the extra CO2 stored as bicarbonate in seawater did not negatively or positively affect the community. 🌊

One of the people fired from NOAA today is the director of the Ocean Acidification Program. That program also leads the U.S. government's effort on marine carbon dioxide removal (mCDR). The destruction of American science is incomprehensible.

www.planetarytech.com/1k-tonnes/ exciting news for OAE

www.nature.com/articles/s41... 1 mol Mg2SiO4 + 2 mol CaCO3 => 2 MgO + Ca2SiO4 (and approx 3 mol CO2 emitted for calcination) gives 8 mol CO2, or net 5 mol CO2 sequestered.👏 Interesting thermochemical olivine upgrading approach and an alternative to electrochemical olivine ==> Mg(OH)2. (1/2)

Biochar and Silicon: A Sustainable Boost for Rice Yields https://buff.ly/4aVkd38 #Biochar #CarbonCapture #Pyrolysis

Biochar’s Big Year: 107,000 Tonnes Delivered Amid 8M Tonne Carbon Removal Boom https://buff.ly/3WL5mT5 #Biochar #CarbonCapture #Pyrolysis

📣Teaming up with @cbiogeo.bsky.social for a #Macrocosms experiment on algae-based #biochar & #basalt for enhanced weathering in a realistic #controlled-environment setup. #ecotron @anaeefrance.bsky.social @cnrsoccitanieest.bsky.social Lysimeters ready! Reach out if you have ideas to collaborate!

📣New preprint! Enhanced weathering (EW) isn’t only about inorganic carbon. Our study shows (1) that weathering ≠ CO2 removal #CDR & (2) that the impact of EW on organic matter decomposition and stabilization is key for reliably estimating actual #CDR. www.researchsquare.com/article/rs-5...

Despite the nonsense we saw from Trump yesterday, please know that climate progress is continuing through other channels... This is important to keep in mind, every day.

Are enhanced rock weathering rates overestimated? Here, we aim to contribute to the conversation around quantifying carbon dioxide removal in ERW applications while highlighting three aspects of rock powders' geochemical and mineralogical compositions that can lead to overestimating rates. #CDR

Interesting study that concludes processing ultramaphic rock to Mg(OH)2 may be an attractive pathway for CDR.

#phd #jobalert Within a multidisciplinary research project, funded by @ethzurich.bsky.social, we seek a doctoral student to develop and evaluate new geochemical tracers for the quantification of carbon dioxide removal following enhanced rock weathering applications.