气候变化领域集成服务门户(CCPortal): Aerosol Dynamics in the Near Field of the SCoPEx Stratospheric Balloon Experiment

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DOI	10.1029/2020JD033438
	Aerosol Dynamics in the Near Field of the SCoPEx Stratospheric Balloon Experiment
	Golja C.M.; Chew L.W.; Dykema J.A.; Keith D.W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	Stratospheric aerosol injection (SAI) might alleviate some climate risks associated with accumulating greenhouse gases. Reduction of specific process uncertainties relevant to the distribution of aerosol in a turbulent stratospheric wake is necessary to support informed decisions about aircraft deployment of this technology. To predict aerosol size distributions, we apply microphysical parameterizations of nucleation, condensation, and coagulation to simulate an aerosol plume generated via injection of calcite powder or sulfate into a stratospheric wake with velocity and turbulence simulated by a three-dimensional (3D) fluid dynamic calculation. We apply the model to predict the aerosol distribution that would be generated by a propeller wake in the Stratospheric Controlled Perturbation Experiment (SCoPEx). We find that injecting 0.1 g s−1 calcite aerosol produces a nearly monodisperse plume and that at the same injection rate, condensable sulfate aerosol forms particles with average radii of 0.1 µm at 3 km downstream. We test the sensitivity of plume aerosol composition, size, and optical depth to the mass injection rate and injection location. Aerosol size distribution depends more strongly on injection rate than injection configuration. Comparing plume properties with specifications of a typical photometer, we find that plumes could be detected optically as the payload flies under the plume. These findings test the relevance of in situ sampling of aerosol properties by the SCoPEx outdoor experiment to enable quantitative tests of microphysics in a stratospheric plume. Our findings provide a basis for developing predictive models of SAI using aerosols formed in stratospheric aircraft wakes. © 2021. The Authors.
英文关键词	Aerosols; climate; geoengineering; microphysics; solar radiation modification; stratosphere
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185470
作者单位	Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Golja C.M.,Chew L.W.,Dykema J.A.,et al. Aerosol Dynamics in the Near Field of the SCoPEx Stratospheric Balloon Experiment[J],2021,126(4).
APA	Golja C.M.,Chew L.W.,Dykema J.A.,&Keith D.W..(2021).Aerosol Dynamics in the Near Field of the SCoPEx Stratospheric Balloon Experiment.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Golja C.M.,et al."Aerosol Dynamics in the Near Field of the SCoPEx Stratospheric Balloon Experiment".Journal of Geophysical Research: Atmospheres 126.4(2021).