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Title: Radiative and Chemical Response to Interactive Stratospheric Sulfate Aerosols in Fully Coupled CESM1(WACCM)

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1002/2017JD027006· OSTI ID:1439705
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [7]; ORCiD logo [3]; ORCiD logo [6]; ORCiD logo [6]; ORCiD logo [1]
  1. National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry, Observations and Modeling Lab.
  2. National Center for Atmospheric Research, Boulder, CO (United States).Climate and Global Dynamics Lab.
  3. National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry, Observations and Modeling Lab., Climate and Global Dynamics Lab.
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Computing and Mathematical Sciences; Cornell Univ., Ithaca, NY (United States). Mechanical and Aerospace Engineering
  6. National Center for Atmospheric Research, Boulder, CO (United States). Climate and Global Dynamics Lab.
  7. Univ. of Leeds, Leeds (United Kingdom). School of Earth and Environment; Univ. of Cambridge (United Kingdom). Depts. of Chemistry and Geography
+ Show Author Affiliations

We present a new version of the Community Earth System Model, version 1 (CESM1) with the Whole Atmosphere Community Climate Model (WACCM) featuring numerous improvements that are unique among earth system models. Improved horizontal resolution, dynamics, and chemistry now provide the development of an internally generated quasi-biennial oscillation, and significant improvements to temperatures and ozone throughout the stratosphere. The prognostic treatment of stratospheric sulfate aerosols is shown to represent well the evolution of stratospheric aerosol optical depth and perturbations to solar and longwave radiation following volcanic eruptions. We identify the inclusion of interactive OH chemistry as crucial to the study of aerosol formation following large inputs of SO2 to the stratosphere. We show that depletion of OH levels within the dense SO2 cloud in the first weeks following the June 1991 eruption of Mt. Pinatubo significantly prolonged the e-folding decay time for SO2 oxidation to 47 days. Previous observational and model studies showing a 30-day decay time have not accounted for the large initial losses of SO2 on ash and ice in the first 7-9 days following the eruption, and have not correctly accounted for OH depletion. The completeness of the chemistry, dynamics, and aerosol microphysics in WACCM uniquely qualify it for studies of stratospheric sulfate aerosol geoengineering.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1439705
Report Number(s):
PNNL-SA-124898; 453040135
Journal Information:
Journal of Geophysical Research: Atmospheres, Vol. 122, Issue 23; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 92 works
Citation information provided by
Web of Science

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Cited By (14)

Holistic Assessment of SO 2 Injections Using CESM1(WACCM): Introduction to the Special Issue journal January 2019
Modeling the 1783–1784 Laki Eruption in Iceland: 1. Aerosol Evolution and Global Stratospheric Circulation Impacts journal July 2019
Effects of Aerosols on the Precipitation of Convective Clouds: A Case Study in the Yangtze River Delta of China journal July 2019
Persistent polar ocean warming in a strategically geoengineered climate journal October 2018
Climatology of mesopause region nocturnal temperature, zonal wind and sodium density observed by sodium lidar over Hefei, China (32° N, 117° E) journal January 2018
Stratospheric aerosol radiative forcing simulated by the chemistry climate model EMAC using Aerosol CCI satellite data journal January 2018
Multi-model comparison of the volcanic sulfate deposition from the 1815 eruption of Mt. Tambora journal January 2018
Revisiting the Agung 1963 volcanic forcing – impact of one or two eruptions journal January 2019
Exploring accumulation-mode H 2 SO 4 versus SO 2 stratospheric sulfate geoengineering in a sectional aerosol–chemistry–climate model journal January 2019
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design journal January 2018
Stratospheric aerosol evolution after Pinatubo simulated with a coupled size-resolved aerosol–chemistry–climate model, SOCOL-AERv1.0 journal January 2018
Volcanic Radiative Forcing From 1979 to 2015 text January 2018
Stratospheric aerosol evolution after Pinatubo simulated with a coupled size-resolved aerosol-chemistry-climate model, SOCOL-AERv1.0 text January 2018
The Interactive Stratospheric Aerosol Model Intercomparison Project (ISA-MIP): motivation and experimental design text January 2018

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Related Subjects

54 ENVIRONMENTAL SCIENCES
stratospheric aerosols
volcanic eruptions
geoengineering
climate modeling
stratospheric ozone
climate change