气候变化领域集成服务门户(CCPortal): High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed-Phase Clouds Simulated With a Global Aerosol-Climate Model

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DOI	10.1029/2020JD034263
	High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed-Phase Clouds Simulated With a Global Aerosol-Climate Model
	Kawai K.; Matsui H.; Tobo Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:12
英文摘要	Mineral dust affects the microphysical and radiative properties of mixed-phase clouds and hence the radiative balance of the Earth by acting as ice nucleating particles (INPs). However, the importance of Asian dust as INPs is not well understood. In this study, we examined the contribution of Asian dust to global dust INPs and its effect on cloud radiative forcing (CRF) using a global aerosol-climate model with an ice nucleation parameterization that links INP number concentrations to ambient temperature and dust number concentrations. Our model well reproduces INP number concentrations measured over the Tokyo Metropolitan area in Japan during May 2017, when Asian dust was transported to Japan. Our simulation for the years 2013–2017 shows that Asian dust extends from its source regions (e.g., the Gobi and Taklimakan Deserts) to the North Pacific, North America, and the Arctic. Notably, Asian dust is transported to higher altitudes (i.e., to temperature regimes relevant for the formation of mixed-phase clouds) more efficiently than dust from other regions. The annual-mean simulated contribution of Asian dust to global dust INPs is 15%, which is 4.4 times higher than its contribution to global atmospheric dust loading (3.4%). These characteristics of Asian dust show its high potential to act as INPs in mixed-phase clouds. Sensitivity simulations show that Asian dust INPs have a positive net CRF of 0.054–0.19 W m−2 in East Asia and the North Pacific during 2013–2017 (cf. 0.092–1.0 W m−2 for dust from other regions). © 2021. The Authors.
英文关键词	Asian dust; cloud radiative forcing; global aerosol model; ice nucleation; mixed-phase clouds; simulation
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/185128
作者单位	Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; National Institute of Polar Research, Tachikawa, Japan; The Graduate University for Advanced Studies, SOKENDAI, Tachikawa, Japan
推荐引用方式 GB/T 7714	Kawai K.,Matsui H.,Tobo Y.. High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed-Phase Clouds Simulated With a Global Aerosol-Climate Model[J],2021,126(12).
APA	Kawai K.,Matsui H.,&Tobo Y..(2021).High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed-Phase Clouds Simulated With a Global Aerosol-Climate Model.Journal of Geophysical Research: Atmospheres,126(12).
MLA	Kawai K.,et al."High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed-Phase Clouds Simulated With a Global Aerosol-Climate Model".Journal of Geophysical Research: Atmospheres 126.12(2021).