Climate Impacts from Large Volcanic Eruptions in a High-resolution Climate Model: the Importance of Forcing Structure

Yang, Wenchang; Vecchi, Gabriel; Fueglistaler, Stephan; Horowitz, Larry; Luet, David; Muñoz, Ángel; Paynter, David; Underwood, Seth
Issue date: 2019
Cite as:
Yang, Wenchang, Vecchi, Gabriel, Fueglistaler, Stephan, Horowitz, Larry, Luet, David, Muñoz, Ángel, Paynter, David, & Underwood, Seth. (2019). Climate Impacts from Large Volcanic Eruptions in a High-resolution Climate Model: the Importance of Forcing Structure [Data set]. https://doi.org/10.34770/3cyy-d553
@electronic{yang_wenchang_2019,
  author      = {Yang, Wenchang and
                Vecchi, Gabriel and
                Fueglistaler, Stephan and
                Horowitz, Larry and
                Luet, David and
                Muñoz, Ángel and
                Paynter, David and
                Underwood, Seth},
  title       = {{Climate Impacts from Large Volcanic Erup
                tions in a High-resolution Climate Model
                : the Importance of Forcing Structure}},
  year        = 2019,
  url         = {https://doi.org/10.34770/3cyy-d553}
}
Abstract:

Explosive volcanic eruptions have large climate impacts, and can serve as observable tests of the climatic response to radiative forcing. Using a high resolution climate model, we contrast the climate responses to Pinatubo, with symmetric forcing, and those to Santa Maria and Agung, which had meridionally asymmetric forcing. Although Pinatubo had larger global-mean forcing, asymmetric forcing strongly shifts the latitude of tropical rainfall features, leading to larger local precipitation/TC changes. For example, North Atlantic TC activity over is enhanced/reduced by SH-forcing (Agung)/NH-forcing (Santa Maria), but changes little in response to the Pinatubo forcing. Moreover, the transient climate sensitivity estimated from the response to Santa Maria is 20% larger than that from Pinatubo or Agung. This spread in climatic impacts of volcanoes needs to be considered when evaluating the role of volcanoes in global and regional climate, and serves to contextualize the well-observed response to Pinatubo.

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Description:

Data used for a paper of Geophysical Research Letters.

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