Allometry: how much CO2 in a tree or forest?

This data-file contains cleaned-up allometry equations to quantify the amount of CO2 captured by a tree, based on its height and its diameter at 1.3m height (DBH).

Covered in the data-file are six of the most important tree species in Europe: aspen, alder, birch, oak, pine and spruce.

Variations are also noted in the data-file, in order to quantify the ‘error of the estimate’ when measuring forest carbon.

Reforestation: a real-life roadmap?

This 12-page note sets out an early-stage ambition for Thunder Said Energy to reforest former farmland in Estonia, producing high-quality CO2 credits in a biodiverse forest. The primary purpose would be to stress-test nature-based carbon removals in our roadmap to net zero, and understand the bottlenecks. IRRs can also surpass 10% at $35-50/ton CO2.

Mangrove restoration: what costs for carbon offsets?

This data-file calculates the economics of carbon-offsetting via mangrove restoration projects, including a full breakdown of costs. This matters as mangroves are a crucial blue carbon eco-system.

In the US, we estimate a $130/ton CO2 price is required for a 10% IRR, of which c30% is the cost of labor (to plant seedlings at $15/hour) and c30% is land leasing.

In the emerging world, a $15-35/ton CO2 price suffices for a c 10% IRR. The lower costs may be an argument for developed world countries to partner with emerging world countries to promote cost-effective carbon sequestration.

Finally, if the projects are viewed as a charitable undertaking simply required to break even (while restoring nature, offsetting CO2 and lifting local people out of poverty), then the best projects in the emerging world can have a CO2 cost as low as $3/ton.

Please download the data-file to stress-test the inputs and assumptions.

Copyright: Thunder Said Energy, 2022.