National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry, Observations and Modeling Lab.
National Center for Atmospheric Research, Boulder, CO (United States).Climate and Global Dynamics Lab.
National Center for Atmospheric Research, Boulder, CO (United States). Atmospheric Chemistry, Observations and Modeling Lab., Climate and Global Dynamics Lab.
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
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
National Center for Atmospheric Research, Boulder, CO (United States). Climate and Global Dynamics Lab.
Univ. of Leeds, Leeds (United Kingdom). School of Earth and Environment; Univ. of Cambridge (United Kingdom). Depts. of Chemistry and Geography
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.
Mills, Michael J., et al. "Radiative and Chemical Response to Interactive Stratospheric Sulfate Aerosols in Fully Coupled CESM1(WACCM)." Journal of Geophysical Research: Atmospheres, vol. 122, no. 23, Nov. 2017. https://doi.org/10.1002/2017JD027006
Mills, Michael J., Richter, Jadwiga H., Tilmes, Simone, Kravitz, Ben, MacMartin, Douglas G., Glanville, Anne A., Tribbia, Joseph J., Lamarque, Jean‐François, Vitt, Francis, Schmidt, Anja, Gettelman, Andrew, Hannay, Cecile, Bacmeister, Julio T., & Kinnison, Douglas E. (2017). Radiative and Chemical Response to Interactive Stratospheric Sulfate Aerosols in Fully Coupled CESM1(WACCM). Journal of Geophysical Research: Atmospheres, 122(23). https://doi.org/10.1002/2017JD027006
Mills, Michael J., Richter, Jadwiga H., Tilmes, Simone, et al., "Radiative and Chemical Response to Interactive Stratospheric Sulfate Aerosols in Fully Coupled CESM1(WACCM)," Journal of Geophysical Research: Atmospheres 122, no. 23 (2017), https://doi.org/10.1002/2017JD027006
@article{osti_1439705,
author = {Mills, Michael J. and Richter, Jadwiga H. and Tilmes, Simone and Kravitz, Ben and MacMartin, Douglas G. and Glanville, Anne A. and Tribbia, Joseph J. and Lamarque, Jean‐François and Vitt, Francis and Schmidt, Anja and others},
title = {Radiative and Chemical Response to Interactive Stratospheric Sulfate Aerosols in Fully Coupled CESM1(WACCM)},
annote = {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.},
doi = {10.1002/2017JD027006},
url = {https://www.osti.gov/biblio/1439705},
journal = {Journal of Geophysical Research: Atmospheres},
issn = {ISSN 2169-897X},
number = {23},
volume = {122},
place = {United States},
publisher = {American Geophysical Union},
year = {2017},
month = {11}}