There is a striking difference between land- and ocean-based #CDR.

Ocean CDR ideas like adding #alkalinity or artificial upwelling imply unprecedented intervention into ocean commons, with unknown impacts on ecosystems. #Monitoring, not to mention regulating, would be practicably challenging, because ocean waters move.

Land carbon cycle is already managed by agriculture, urbanization etc. Land CDR would be a mean of already ongoing carbon rebalancing.

#climatechange #climateaction

Scientists discover critical factors that determine the survival of #airborne #viruses.

#droplets #alkalinity

https://phys.org/news/2023-06-scientists-critical-factors-survival-airborne.html

A machine learning approach to freshwater analysis

https://phys.org/news/2023-06-machine-approach-freshwater-analysis.amp

#salinity #alkalinity #freshwater #MachineLearning

@awi @EuroGeosciences

If you haven’t read it yet, also check out this incredibly comprehensive overview on #alkalinity in #CMIP6 models, and improvements from CMIP5 to CMIP6 by Planchat et al, with Laurent Bopp, Lester Kwiatkowski and many others.

https://egusphere.copernicus.org/preprints/2022/egusphere-2022-1041/

New preprint from our group on #alkalinity biases in Earth System Models, attribution to processes, and implications for simulations of ocean alkalinity enhancement.

Claudia Hinrichs et al. @awi @EuroGeosciences #OceanNETs #MarESys #NewPaper #negativeemissions #oceanography #CMIP6

https://doi.org/10.5194/bg-2023-26

RT @bach_lennart@twitter.com

RT @mtyka
Our new paper (with Jing He) on #ocean #alkalinity and #OAE / #mCDR is out: https://bg.copernicus.org/articles/20/27/2023/
We examine the sensitivity of pH and #CaCO3 sensitivity along different coasts as well as the equilibration timescale of #CO2 (1/2)

🐦🔗: https://twitter.com/bach_lennart/status/1610358465376952322

The Tasmanian freshwater #alkalinity survey moves forward with some of the youngest samplers in action during summer holidays.
We have about 300 samples from rivers and creeks all over #Tasmania so far.
Highest value: 7426 micromol/kg
Lowest value: 12 micromol/kg
#citizenscience

@mtyka Didn't read the whole thing but learned there is a movement to reduce the #acid or increase the #alkalinity of the #ocean.

Our new paper (with Jing He) on #ocean #alkalinity and #OAE / #mCDR is out: https://bg.copernicus.org/articles/20/27/2023/
We examine the sensitivity of pH and CaCO3 sensitivity along different coasts as well as the equilibration timescale of CO2 uptake.

For carbon dioxide removal (#CDR), does anyone else think of #EnhancedWeathering, which is usually thought of as a terrestrial technique, as just another way to eventually add #alkalinity to the #ocean so it's really ocean CDR and #OceanAlkalinityEnhancement (#OAE)?

#Frontier just announced the second round of #carbon #dioxide #removal (#CDR) purchases by #Stripe and #Shopify. One of the companies is Captura, which is supposedly doing "Direct Ocean Capture."

Removing CO₂ from seawater is not CDR (you have to wait until that seawater equilibrates with atmospheric CO₂) so I don't know how this is better than Ocean #Alkalinity Enhancement.

But I don't care. I want to see them build this thing exactly as it's rendered here.

https://frontierclimate.com/writing/fall-2022-purchases

It’s been a crazy morning. I’m a mad scientist testing #saltwater to make sure I can do the #coral move to the new #reef tank.

#Alkalinity has been so unstable throughout the week. I think the new system needs more surfaces coated with magnesium ions. My assumption is that I’m losing bicarbonate to rock /surface absorption in the larger tank.