globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025160
论文题名:
Ice nucleation activity of agricultural soil dust aerosols from Mongolia, Argentina, and Germany
作者: Steinke I.; Funk R.; Busse J.; Iturri A.; Kirchen S.; Leue M.; Möhler O.; Schwartz T.; Schnaiter M.; Sierau B.; Toprak E.; Ullrich R.; Ulrich A.; Hoose C.; Leisner T.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期:22
起始页码: 559
结束页码: 576
语种: 英语
英文关键词: clouds and aerosols ; heterogeneous ice nucleation ; soil dust
Scopus关键词: aerosol ; agricultural soil ; atmospheric deposition ; dust ; freezing ; nucleation ; organic matter ; thermodynamics ; Argentina ; Arizona ; China ; Germany ; Mongolia ; United States
英文摘要: Soil dust particles emitted from agricultural areas contain considerable mass fractions of organic material. Also, soil dust particles may act as carriers for potentially ice-active biological particles. In this work, we present ice nucleation experiments conducted in the Aerosol Interaction and Dynamics in the Atmosphere (AIDA) cloud chamber. We investigated the ice nucleation efficiency of four types of soil dust from different regions of the world. The results are expressed as ice nucleation active surface site (INAS) densities and presented for the immersion freezing and the deposition nucleation mode. For immersion freezing occurring at 254 K, samples from Argentina, China, and Germany show ice nucleation efficiencies which are by a factor of 10 higher than desert dusts. On average, the difference in ice nucleation efficiencies between agricultural and desert dusts becomes significantly smaller at temperatures below 247 K. In the deposition mode the soil dusts showed higher ice nucleation activity than Arizona Test Dust over a temperature range between 232 and 248 K and humidities RHice up to 125%. INAS densities varied between 109 and 1011 m−2 for these thermodynamic conditions. For one soil dust sample (Argentinian Soil), the effect of treatments with heat was investigated. Heat treatments (383 K) did not affect the ice nucleation efficiency observed at 249 K. This finding presumably excludes proteinaceous ice-nucleating entities as the only source of the increased ice nucleation efficiency. ©2016. American Geophysical Union. All Rights Reserved.
资助项目: EL 191/7-1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62792
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Institute of Soil Landscape Research, Leibniz Centre for Agricultural Landscape Research, Müncheberg, Germany; Institute of Earth and Atmospheric Sciences, National University of La Pampa, Santa Rosa, Argentina; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Karlsruhe, Germany; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Institute of Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research, Müncheberg, Germany; Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany

Recommended Citation:
Steinke I.,Funk R.,Busse J.,et al. Ice nucleation activity of agricultural soil dust aerosols from Mongolia, Argentina, and Germany[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)
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