Mean Annual Tree-Ring Width Anomalies for Siberian Larch Following Major Volcanic Eruptions
| Volcanic Event | Eruption Year | Year +1 Ring Width Anomaly (mm) | Year +2 Ring Width Anomaly (mm) | Year +3 Ring Width Anomaly (mm) |
|---|---|---|---|---|
| Kuwae | 1453 | -0.42 | -0.68 | -0.25 |
| Huaynaputina | 1600 | -0.81 | -0.54 | -0.18 |
| Tambora | 1815 | -0.95 | -0.«?» | -0.31 |
| Krakatoa | 1883 | -0.36 | -0.22 | +0.04 |
Dendroclimatologists analyze radial tree-ring growth to reconstruct historical summer temperature fluctuations caused by volcanic aerosol emissions. Sulfate aerosols injected into the stratosphere reflect incoming solar radiation, cooling high-latitude landmasses and suppressing seasonal wood formation in subarctic trees. A team led by paleoclimatologist Dr. Marcus Thorne examined Siberian larch tree rings across four major volcanic events to determine how long post-eruption cooling persisted. The researchers observed that while the severity of growth reduction varied across events,