Estonia's forest carbon stock peaked in 2017 and has fallen every year since. By 2024 it stood at 152,742 thousand tonnes against 163,396 at the peak — down 6.5% over 7 years (Statistics Estonia, table KK509).
That runs against an assumption one meets often: that Estonian forest is a growing carbon sink. For the last seven years it has not been.
Data table
| Period | Carbon stock |
|---|---|
| 2005 | 145,191 |
| 2006 | 146,316 |
| 2007 | 147,753 |
| 2008 | 147,424 |
| 2009 | 149,471 |
| 2010 | 151,029 |
| 2011 | 154,278 |
| 2012 | 156,404 |
| 2013 | 159,640 |
| 2014 | 161,737 |
| 2015 | 162,300 |
| 2016 | 162,466 |
| 2017 | 163,396 |
| 2018 | 161,528 |
| 2019 | 160,425 |
| 2020 | 158,234 |
| 2021 | 155,769 |
| 2022 | 153,472 |
| 2023 | 152,849 |
| 2024 | 152,742 |
Before using these numbers: this table was wrong
Stated plainly, because it matters. Until August 2026 the species labels on KK509's carbon series were misaligned — across the table's entire 36-year history. The values were right but attached to the wrong species, so grey alder appeared to carry three times more carbon than it had biomass, which is not physically possible.
Statistics Estonia corrected it on 27 August 2026 after we reported it. The figures here come from the corrected table. If you have used this table by species before, your numbers are likely attributed to the wrong species; the Total row was never affected.
Every year's carbon-to-biomass ratio is asserted when this article is built. If the ordering ever breaks again the build fails rather than publishing a wrong number.
Where the decline sits
It is not evenly spread. Of the named species spruce has lost most, 12.7%. The residual "other tree" category moved further still at 20.6%, but that is a catch-all rather than a species and should not be read as one.
Data table
| Area | Change |
|---|---|
| Other tree | -20.6% |
| Spruce | -12.7% |
| Pine | -7.8% |
| Birch | -3.6% |
| Grey alder | -0.5% |
| Aspen | +2.1% |
| Common alder | +3.4% |
Two species have gained: aspen and common alder. Both are fast-growing broadleaves with a larger share in younger forest. The pattern is consistent with what you would expect from a forest where mature conifer stands have been harvested and replaced by younger growth of a different composition.
Why it matters in valuation
Carbon stock is a derivative of standing volume: the same wood in a different unit. For a buyer the national decline means three things.
A carbon argument needs parcel-level evidence. Where a sale narrative rests on forest sequestering carbon, national statistics do not support that as a generalisation over the last seven years. A specific parcel may well be accumulating; the country as a whole is not.
Species composition sets the direction. Spruce and pine stands have carried the decline while fast-growing broadleaves gained. A parcel's composition says more than the national average.
It connects to harvesting. The 2025 collapse in felling means less wood was removed; whether that arrests the carbon decline will only show in later releases. There is no data supporting that yet.
Frequently asked questions
How much carbon is stored in Estonian forests?
152,742 thousand tonnes in wooden biomass on forest land in 2024 (Statistics Estonia, table KK509). That is a stock figure covering wooden biomass only; it excludes soil carbon, which is substantial in Estonian forests and especially on peat soils.
Is Estonian forest a growing carbon sink?
Not over the last seven years. The stock peaked in 2017 at 163,396 thousand tonnes and has fallen every year since, to 152,742 in 2024, a 6.5% decline. A specific parcel may well be accumulating, but the national aggregate is not.
Which species lost the most carbon?
Spruce, down 12.7% from the 2017 peak, followed by pine at 7.8%. Aspen and common alder gained over the same period. Both are fast-growing broadleaves with a larger share in younger forest.
Is this a sequestration rate?
No. The table measures a stock, not a flow: how much carbon stands in the forest, not how much is added each year. The two are routinely confused.
Were these figures ever wrong?
Yes. KK509's species labels were misaligned across all 36 years of the table until Statistics Estonia corrected it on 27 August 2026, after we reported it. The values were right but attached to the wrong species. The Total row was never affected. Figures published here come from the corrected table, and every year is ratio-checked when the article is built.
Does the 2025 fall in felling change this?
Not yet visibly. Less wood was removed in 2025, but whether that arrests the carbon decline will only show in later releases. There is no data supporting it at present.
What this is not
It is not a sequestration rate. The table measures a stock, not a flow — how much carbon stands in the forest, not how much is added each year. The two are routinely confused.
It also excludes soil carbon, which is substantial in Estonian forests and especially on peat soils, and which moves differently. KK509 covers wooden biomass only.
And it is a national aggregate. Parcel-level work needs volume and species composition from the forest register — see the standing timber and land split and site index.