DOI: 10.1002/jgrd.50196
论文题名: Microphysical simulations of large volcanic eruptions: Pinatubo and Toba
作者: English J.M. ; Toon O.B. ; Mills M.J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 4 起始页码: 1880
结束页码: 1895
语种: 英语
英文关键词: aerosol
; eruption
; microphysics
; Pinatubo
; Toba
; volcanoes
Scopus关键词: Aerosols
; Atmospheric aerosols
; Atmospheric chemistry
; Atmospheric radiation
; Climate models
; Coagulation
; Size distribution
; Van der Waals forces
; Volcanoes
; Aerosol optical depths
; eruption
; General circulation model
; Microphysics
; Pinatubo
; Quasi-biennial oscillation
; Toba
; Whole atmosphere community climate models
; Computer simulation
; aerosol property
; climate modeling
; coagulation
; Northern Hemisphere
; quasi-biennial oscillation
; radiative forcing
; size distribution
; Southern Hemisphere
; stratosphere
; volcanic aerosol
; volcanic eruption
; Central Luzon
; Greater Sunda Islands
; Indonesia
; Lake Toba
; Luzon
; Mount Pinatubo
; North Sumatra
; Philippines
; Sumatra
; Sunda Isles
; Zambales
; Pinatubo
英文摘要: Simulations of stratospheric clouds from eruptions ranging in size from the 1991 eruption of Mount Pinatubo to that of Toba 74,000 years ago have been completed using a 3D microphysical sectional aerosol model advectively coupled to a general circulation model with prognostic chemistry (Whole Atmosphere Community Climate Model/Community Aerosol and Radiation Model for Atmospheres). For Pinatubo, properties of the aerosol cloud peak within the ranges derived from observations in the Northern Hemisphere, but reduce faster than observed, and a general low bias is found in the Southern Hemisphere. These biases could be reduced by adding aerosol radiative coupling, a quasi-biennial oscillation, and the Cerro Hudson eruption to the model. Simulations of eruptions 10 times and 100 times larger than Pinatubo suggest burdens and Aerosol Optical Depth increase less than linearly (a 100-fold injection increase produces a 20-fold AOD increase) due to particle growth and sedimentation, consistent with previous work that also found the radiative forcings from large eruptions to be self-limiting. Global-averaged AOD remains elevated for 1, 2, and 4 years, respectively, for the three simulated eruptions. The inclusion of van der Waals forces in our coagulation scheme increases peak effective radius and reduces peak AOD by about 10-20%, with bigger effects for larger eruptions. Our simulations find peak mode size to vary by up to an order of magnitude and mode width to vary by up to 50%, suggesting that two-moment modal models may not accurately capture the evolving size distribution. These simulations suggest the value of including van der Waals forces in the coagulation scheme and sectional size distributions in climate models. Key PointsOur model predicts Pinatubo peak but declines too quicklyLarger eruptions increase effective radius and mode widths varyvan der Waals forces increases coagulation and particle size © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63917
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: NCAR Earth System Laboratory, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305, United States; Laboratory for Atmospheric and Space Physics, Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO 80303, United States
Recommended Citation:
English J.M.,Toon O.B.,Mills M.J.. Microphysical simulations of large volcanic eruptions: Pinatubo and Toba[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(4)