globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1922128117
论文题名:
Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash
作者: Jahn L.G.; Polen M.J.; Jahl L.G.; Brubaker T.A.; Somers J.; Sullivan R.C.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:36
起始页码: 21928
结束页码: 21937
语种: 英语
英文关键词: Aerosol-cloud-climate interactions ; Atmospheric chemistry ; Climate change ; Heterogeneous ice nucleation ; Wildfires
Scopus关键词: ice ; inorganic compound ; ice ; mineral ; aerosol ; Article ; atmospheric moisture ; biomass ; biomass burning ; bottom ash ; chemical reaction ; climate change ; cloud ; combustion ; dust ; glaciation ; nutrient availability ; prediction ; priority journal ; soil ; thermoregulation ; aerosol ; atmosphere ; biomass ; chemistry ; fly ash ; freezing ; ice cover ; particle size ; wildfire ; Aerosols ; Atmosphere ; Biomass ; Climate Change ; Coal Ash ; Freezing ; Ice ; Ice Cover ; Minerals ; Particle Size ; Wildfires
英文摘要: Ice nucleation and the resulting cloud glaciation are significant atmospheric processes that affect the evolution of clouds and their properties including radiative forcing and precipitation, yet the sources and properties of atmospheric ice nucleants are poorly constrained. Heterogeneous ice nucleation caused by ice-nucleating particles (INPs) enables cloud glaciation at temperatures above the homogeneous freezing regime that starts near -35 °C. Biomass burning is a significant global source of atmospheric particles and a highly variable and poorly understood source of INPs. The nature of these INPs and how they relate to the fuel composition and its combustion are critical gaps in our understanding of the effects of biomass burning on the environment and climate. Here we show that the combustion process transforms inorganic elements naturally present in the biomass (not soil or dust) to form potentially ice-active minerals in both the bottom ash and emitted aerosol particles. These particles possess ice-nucleation activities high enough to be relevant to mixed-phase clouds and are active over a wide temperature range, nucleating ice at up to -13 °C. Certain inorganic elements can thus serve as indicators to predict the production of ice nucleants from the fuel. Combustion-derived minerals are an important but understudied source of INPs in natural biomass-burning aerosol emissions in addition to lofted primary soil and dust particles. These discoveries and insights should advance the realistic incorporation of biomassburning INPs into atmospheric cloud and climate models. These mineral components produced in biomass-burning aerosol should also be studied in relation to other atmospheric chemistry processes, such as facilitating multiphase chemical reactions and nutrient availability. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164054
Appears in Collections:气候变化与战略

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作者单位: Jahn, L.G., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712, United States; Polen, M.J., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Chemistry, McDaniel College, Westminster, MD 21157, United States; Jahl, L.G., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Brubaker, T.A., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Somers, J., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Sullivan, R.C., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States

Recommended Citation:
Jahn L.G.,Polen M.J.,Jahl L.G.,et al. Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(36)
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