Do tree ring chronologies have missing rings that distort volcanic cooling signal?: Fixing tree ring chronologies yields closer agreement with models



Climate models generally show that when a massive volcano erupts, scattering reflective aerosols across the globe, the planet's temperature declines for up to a few years. However, when researchers look at reconstructed temperature records built on annual tree ring measurements, this volcanic cooling often appeared much weaker than expected or was nonexistent. In a new study reanalyzing regional tree ring growth records, Mann et al. provide a possible explanation for the absence of the cooling effect.