Premiere of Documentary "Legion 44" in Nuremberg

How to avoid confusion about the seemingly straightforward use of alkalinity to quantify CO₂ removal

An overview of our enhanced weathering experiments in fields and in a greenhouse.

How we calculate the amount of CO₂ that has been removed from the atmosphere by weathering in our lysimeter experiments.

Insights from several hundred soil EC sensors and several thousand water analyses in three long-term weathering experiments

A conference presentation by Jens Hammes at the 3rd International Conference on Negative CO2 Emissions, 2024 in Oxford.

A conference presentation by Dr. Ingrid Smet

Keeping a long-term monoculture greenhouse experiment with hundreds of pot experiments alive and working over 2-3 years is not as easy as one could think.

Two important new publications were published that we want to draw your attention to

While reanalyzing our data we found that the differences in CO2 effluxes between treatments/controls are maintained across the whole temperature spectrum. Temperature differences are not the explanation for the differences in effluxes between variations. 

A story about the IT technology behind “the most closely monitored and pampered blades of grass I've ever seen” in our greenhouse.

Introducing our carbon-focused thought-model of the processes that occur in the soil after adding rock amendments for EW.

We present insights we gained from CO₂ efflux, soil pCO₂ and soil water leachate alkalinity data of 400 greenhouse experiments for enhanced weathering (EW).

Why and how we built our army of autonomous CO₂ fluxmeters

Last week we have extended our greenhouse experiment with 78 new lysimeter experiments to now close to 400 experiments in total.

We document our latest pCO₂ sensor design and share a preview of our pCO₂ data while comparing these with the CDR estimates we recently derived from alkalinity.

Here is a look at Carbdown’s year 2023 with a collection of videos about our work!

We update our document from 3 weeks ago about estimating carbon dioxide removal (CDR) by enhanced rock weathering (ERW) using measurements of alkalinity in leachate waters.

How do we “transfer” weathering rates measured in our greenhouse to the outside world?

In this blogpost we explain how the carbon dioxide removal (CDR) effects of weathering rock can be estimated using alkalinity measurements and what early results we see in our greenhouse experiment.