Arid
Efficiency of the deposition mode ice nucleation on mineral dust particles
Moehler, O.; Field, P. R.; Connolly, P.; Benz, S.; Saathoff, H.; Schnaiter, M.; Wagner, R.; Cotton, R.; Kraemer, M.; Mangold, A.; Heymsfield, A. J.
通讯作者Moehler, O.
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
出版年2006
卷号6页码:3007-3021
英文摘要

The deposition mode ice nucleation efficiency of various dust aerosols was investigated at cirrus cloud temperatures between 196 and 223 K using the aerosol and cloud chamber facility AIDA (Aerosol Interaction and Dynamics in the Atmosphere). Arizona test dust (ATD) as a reference material and two dust samples from the Takla Makan desert in Asia (AD1) and the Sahara (SD2) were used for the experiments at simulated cloud conditions. The dust particle sizes were almost lognormally distributed with mode diameters between 0.3 and 0.5 mu m and geometric standard deviations between 1.6 and 1.9. Deposition ice nucleation was most efficient on ATD particles with ice-active particle fractions of about 0.6 and 0.8 at an ice saturation ratio S(i) < 1.15 and temperatures of 223 and 209 K, respectively. No significant change of the ice nucleation efficiency was found in up to three subsequent cycles of ice activation and evaporation with the same ATD aerosol. This indicates that the phenomenon of preactivation does not apply to ATD particles. The desert dust samples SD2 and AD1 showed a significantly lower fraction of active deposition nuclei, about 0.25 at 223 K and S(i) < 1.35. For all samples the ice activated aerosol fraction could be approximated by an exponential equation as function of Si. This indicates that deposition ice nucleation on mineral particles may not be treated in the same stochastic sense as homogeneous freezing. The suggested formulation of ice activation spectra may be used to calculate the formation rate of ice crystals in models, if the number concentration of dust particles is known. More experimental work is needed to quantify the variability of the ice activation spectra as function of the temperature and dust particle properties.


类型Article
语种英语
国家Germany ; England ; USA
收录类别SCI-E
WOS记录号WOS:000239176200002
WOS关键词OROGRAPHIC WAVE CLOUDS ; AEROSOL CHAMBER AIDA ; SUPERCOOLED WATER ; RELATIVE-HUMIDITY ; CIRRUS CRYSTALS ; DROPLETS ; PARAMETERIZATION ; TEMPERATURES ; PRESSURES ; SURFACES
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/150811
作者单位(1)Forschungszentrum Karlsruhe, Inst Meteorol & Climate Res, Karlsruhe, Germany;(2)Met Off, Exeter, Devon, England;(3)Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester, Lancs, England;(4)Forschungszentrum Julich, Inst Chem & Dynam Geosphare ICG 1, Julich, Germany;(5)Natl Ctr Atmospher Res, Boulder, CO 80307 USA
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GB/T 7714
Moehler, O.,Field, P. R.,Connolly, P.,et al. Efficiency of the deposition mode ice nucleation on mineral dust particles[J],2006,6:3007-3021.
APA Moehler, O..,Field, P. R..,Connolly, P..,Benz, S..,Saathoff, H..,...&Heymsfield, A. J..(2006).Efficiency of the deposition mode ice nucleation on mineral dust particles.ATMOSPHERIC CHEMISTRY AND PHYSICS,6,3007-3021.
MLA Moehler, O.,et al."Efficiency of the deposition mode ice nucleation on mineral dust particles".ATMOSPHERIC CHEMISTRY AND PHYSICS 6(2006):3007-3021.
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