气候变化领域集成服务门户(CCPortal): The impact of solar radiation on polar mesospheric ice particle formation

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DOI	10.5194/acp-19-4311-2019
	The impact of solar radiation on polar mesospheric ice particle formation
	Nachbar M.; Wilms H.; Duft D.; Aylett T.; Kitajima K.; Majima T.; Plane J.M.C.; Rapp M.; Leisner T.
发表日期	2019
ISSN	16807316
起始页码	4311
结束页码	4322
卷号	19 期号:7
英文摘要	Mean temperatures in the polar summer mesopause can drop to 130 K. The low temperatures in combination with water vapor mixing ratios of a few parts per million give rise to the formation of ice particles. These ice particles may be observed as polar mesospheric clouds. Mesospheric ice cloud formation is believed to initiate heterogeneously on small aerosol particles (r < 2ĝ€†nm) composed of recondensed meteoric material, so-called meteoric smoke particles (MSPs). Recently, we investigated the ice activation and growth behavior of MSP analogues under realistic mesopause conditions. Based on these measurements we presented a new activation model which largely reduced the uncertainties in describing ice particle formation. However, this activation model neglected the possibility that MSPs heat up in the low-density mesopause due to absorption of solar and terrestrial irradiation. Radiative heating of the particles may severely reduce their ice formation ability. In this study we expose MSP analogues (Fe2O3 and FexSi1 ĝ ' xO3) to realistic mesopause temperatures and water vapor concentrations and investigate particle warming under the influence of variable intensities of visible light (405, 488, and 660 nm). We show that Mie theory calculations using refractive indices of bulk material from the literature combined with an equilibrium temperature model presented in this work predict the particle warming very well. Additionally, we confirm that the absorption efficiency increases with the iron content of the MSP material. We apply our findings to mesopause conditions and conclude that the impact of solar and terrestrial radiation on ice particle formation is significantly lower than previously assumed. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; ice; low temperature; mesopause; mesosphere; solar radiation; summer; water vapor
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144523
作者单位	Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology - KIT, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany; Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany; School of Chemistry, University of Leeds, Leeds, LS2 9JT, United Kingdom; Department of Nuclear Engineering, Kyoto University, Kyoto, 615-8540, Japan; Meteorologisches Institut München, Ludwig-Maximilians-Universität München, Munich, Germany; Institute of Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, Heidelberg, 69120, Germany
推荐引用方式 GB/T 7714	Nachbar M.,Wilms H.,Duft D.,et al. The impact of solar radiation on polar mesospheric ice particle formation[J],2019,19(7).
APA	Nachbar M..,Wilms H..,Duft D..,Aylett T..,Kitajima K..,...&Leisner T..(2019).The impact of solar radiation on polar mesospheric ice particle formation.Atmospheric Chemistry and Physics,19(7).
MLA	Nachbar M.,et al."The impact of solar radiation on polar mesospheric ice particle formation".Atmospheric Chemistry and Physics 19.7(2019).