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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
Peer-reviewed Journal Articles, etc >
Global temperature response to the major volcanic eruptions in multiple reanalysis data sets
This item is licensed under:Creative Commons Attribution 3.0 Unported
| Title: | Global temperature response to the major volcanic eruptions in multiple reanalysis data sets |
| Authors: | Fujiwara, M. Browse this author →KAKEN DB | | Hibino, T. Browse this author | | Mehta, S. K. Browse this author | | Gray, L. Browse this author | | Mitchell, D. Browse this author | | Anstey, J. Browse this author |
| Issue Date: | 15-Feb-2016 |
| Publisher: | Copernicus Publications |
| Journal Title: | Atmospheric chemistry and physics |
| Volume: | 15 |
| Issue: | 23 |
| Start Page: | 13507 |
| End Page: | 13518 |
| Publisher DOI: | 10.5194/acp-15-13507-2015 |
| Abstract: | The global temperature responses to the eruptions of Mount Agung in 1963, El Chichon in 1982, and Mount Pinatubo in 1991 are investigated using nine currently available reanalysis data sets (JRA-55, MERRA, ERA-Interim, NCEP-CFSR, JRA-25, ERA-40, NCEP-1, NCEP-2, and 20CR). Multiple linear regression is applied to the zonal and monthly mean time series of temperature for two periods, 1979-2009 (for eight reanalysis data sets) and 19582001 (for four reanalysis data sets), by considering explanatory factors of seasonal harmonics, linear trends, Quasi-Biennial Oscillation, solar cycle, and El Nino Southern Oscillation. The residuals are used to define the volcanic signals for the three eruptions separately, and common and different responses among the older and newer reanalysis data sets are highlighted for each eruption. In response to the Mount Pinatubo eruption, most reanalysis data sets show strong warming signals (up to 2-3K for 1-year average) in the tropical lower stratosphere and weak cooling signals (down to - 1 K) in the subtropical upper troposphere. For the El Chichon eruption, warming signals in the tropical lower stratosphere are somewhat smaller than those for the Mount Pinatubo eruption. The response to the Mount Agung eruption is asymmetric about the equator with strong warming in the Southern Hemisphere midlatitude upper troposphere to lower stratosphere. Comparison of the results from several different reanalysis data sets confirms the atmospheric temperature response to these major eruptions qualitatively, but also shows quantitative differences even among the most recent reanalysis data sets. The consistencies and differences among different reanalysis data sets provide a measure of the confidence and uncertainty in our current understanding of the volcanic response. The results of this intercomparison study may be useful for validation of climate model responses to volcanic forcing and for assessing proposed geo-engineering by stratospheric aerosol injection, as well as to link studies using only a single reanalysis data set to other studies using a different reanalysis data set. |
| Rights: | http://creativecommons.org/licenses/by/3.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/60660 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤原 正智
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