Savanna carbon behaves unlike forest carbon in one decisive respect, as most of the stock is underground. That single fact reshapes the methodology around it, specifically what gets measured, where the uncertainty concentrates, and why the baseline is an agricultural question rather than a forestry one.
The Carbon Is Mostly Below Ground
| Pool | Share of savanna carbon | Measurement difficulty |
|---|---|---|
| Above-ground woody | Modest | Straightforward |
| Above-ground herbaceous | Small, highly seasonal | Timing-dependent |
| Roots | Substantial | Estimated, not measured |
| Soil organic carbon | Dominant | Hard — small signal, large stock |
In forest carbon you can largely ignore soil and still capture most of the change. In savanna you cannot: excluding soil excludes the majority of what conversion destroys.
That forces the methodology into the difficult measurement regime described elsewhere on this site, which involves detecting a change in a large, spatially variable soil pool, and it is why savanna projects carry heavier sampling requirements than their above ground stocks would suggest.
The Baseline Is an Agricultural Decision
Natural savanna is converted because someone intends to farm or graze it. The counterfactual is therefore a land-use decision by an identified party, not a diffuse pressure.
This makes the baseline more evidenced than an unplanned deforestation baseline, because there are usually plans, permits, and economics involved, and it makes the additionality test sharper. If the conversion was legally permitted and commercially attractive, the project has a case. If it was permitted but uneconomic, the conversion was not going to happen and the baseline collapses
Projects in this space should expect the economics of the avoided conversion to be examined directly, and should assemble that evidence at design stage rather than when asked.
Fire Is a Live Complication
Savannas burn, naturally and through management. Fire moves carbon between pools and into the atmosphere on a short cycle, and a monitoring measurement taken shortly after a burn will differ substantially from one taken before.
The methodology has to handle this, and projects have to handle it operationally: consistent measurement timing relative to the fire cycle, and explicit treatment of burns as events rather than as noise to be averaged away.
A project whose monitoring visits happen whenever the field team is available will produce a time series in which fire timing is confounded with carbon change.
The Undervaluation Problem
Savanna and grassland systems have been systematically under-protected relative to forest, partly because carbon frameworks were built around trees and partly because a grassland does not look like it holds much.
It holds a great deal, mostly out of sight, and it is frequently more biodiverse than the plantation that replaces it. Methodologies addressing savanna conversion exist to correct a framing problem as much as a technical one.
For a developer, the practical consequence is that these projects are harder to measure and less crowded than forest equivalents, creating a trade that suits organisations with real soil sampling capability and suits nobody else.
Check the land before you commit
Eligibility turns on land history and forest cover at a cut off date. TREEO Eligibility runs satellite based forest cover detection on your area of interest before a single seed goes into the ground.
