The role of small to moderate volcanic eruptions in the early 19th century climate ...

• Main Author: Shih-Wei Fang
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Zenodo 2023
• Subjects: Greenland; ice core
• Online Access: https://dx.doi.org/10.5281/zenodo.8017388; https://zenodo.org/record/8017388

Surface cooling from small-to-moderate volcanic eruptions in recent decades has been shown to be important when they occur clustered. In this study, based on new high-resolution ice-core data from Greenland, we produce a new volcanic forcing dataset that includes several small-to-moderate eruptions not included in prior reconstructions of the early 19th century and investigate their climate impacts through ensemble simulations with the Max Planck Institute Earth System Model. We find that the clustered small-to-moderate eruptions can additionally produce significant global surface cooling (~0.07 K) during the period 1812-1820, superposing with the cooling by large eruptions in 1809 (unidentified) and 1815 (Tambora). A delayed northward propagation to the higher latitudes is found in the additional surface cooling from small eruptions, but such cooling propagation cannot be confirmed by temperature reconstructions from individual regions due to a low signal-to-noise ratio, hence substantial uncertainties ...