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DOI | 10.1073/pnas.1922128117 |
Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash | |
Leif G. Jahn; Michael J. Polen; Lydia G. Jahl; Thomas A. Brubaker; Joshua Somers; Ryan C. Sullivan | |
2020-08-24 | |
发表期刊 | Proceedings of the National Academy of Science |
出版年 | 2020 |
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 biomass-burning 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. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/293147 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Leif G. Jahn,Michael J. Polen,Lydia G. Jahl,et al. Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash[J]. Proceedings of the National Academy of Science,2020. |
APA | Leif G. Jahn,Michael J. Polen,Lydia G. Jahl,Thomas A. Brubaker,Joshua Somers,&Ryan C. Sullivan.(2020).Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash.Proceedings of the National Academy of Science. |
MLA | Leif G. Jahn,et al."Biomass combustion produces ice-active minerals in biomass-burning aerosol and bottom ash".Proceedings of the National Academy of Science (2020). |
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