Publisher Correction: Boreal forest biomass accumulation is not increased by two decades of soil warming

In the version of the Supplementary Information file originally published with this Letter, ref. 42 — Andersson, P., Berggren, D. & Nilsson, I. Indices for nitrogen status and nitrate leaching from Norway spruce (Picea abies (L.) Karst.) stands in Sweden. For. Ecol. Manag. 157, 39–53 (2002) — should have appeared as a footnote to Supplementary Table 2; this has now been added.