Arid
DOI10.5194/acp-16-9067-2016
Ice nucleating particles in the Saharan Air Layer
Boose, Yvonne1; Sierau, Berko1; Isabel Garcia, M.2,3; Rodriguez, Sergio2; Alastuey, Andres4; Linke, Claudia5; Schnaiter, Martin5; Kupiszewski, Piotr6; Kanji, Zamin A.1; Lohmann, Ulrike1
通讯作者Boose, Yvonne ; Kanji, Zamin A.
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2016
卷号16期号:14页码:9067-9087
英文摘要

This study aims at quantifying the ice nucleation properties of desert dust in the Saharan Air Layer (SAL), the warm, dry and dust-laden layer that expands from North Africa to the Americas. By measuring close to the dust’s emission source, before aging processes during the transatlantic advection potentially modify the dust properties, the study fills a gap between in situ measurements of dust ice nucleating particles (INPs) far away from the Sahara and laboratory studies of ground-collected soil. Two months of online INP concentration measurements are presented, which were part of the two CALIMA campaigns at the Izana observatory in Tenerife, Spain (2373 ma.s.l.), in the summers of 2013 and 2014. INP concentrations were measured in the deposition and condensation mode at temperatures between 233 and 253K with the Portable Ice Nucleation Chamber (PINC). Additional aerosol information such as bulk chemical composition, concentration of fluorescent biological particles as well as the particle size distribution was used to investigate observed variations in the INP concentration.


The concentration of INPs was found to range between 0.2 std L-1 in the deposition mode and up to 2500 std L-1 in the condensation mode at 240 K. It correlates well with the abundance of aluminum, iron, magnesium and manganese (R: 0.43-0.67) and less with that of calcium, sodium or carbonate. These observations are consistent with earlier results from laboratory studies which showed a higher ice nucleation efficiency of certain feldspar and clay minerals compared to other types of mineral dust. We find that an in-crease of ammonium sulfate, linked to anthropogenic emissions in upwind distant anthropogenic sources, mixed with the desert dust has a small positive effect on the condensation mode INP per dust mass ratio but no effect on the deposition mode INP. Furthermore, the relative abundance of biological particles was found to be significantly higher in INPs compared to the ambient aerosol. Overall, this suggests that atmospheric aging processes in the SAL can lead to an increase in ice nucleation ability of mineral dust from the Sahara. INP concentrations predicted with two common parameterization schemes, which were derived mostly from atmospheric measurements far away from the Sahara but influenced by Asian and Saharan dust, were found to be higher based on the aerosol load than we observed in the SAL, further suggesting aging effects of INPs in the SAL.


类型Article
语种英语
国家Switzerland ; Spain ; Germany
收录类别SCI-E
WOS记录号WOS:000381213300018
WOS关键词BIOLOGICAL AEROSOL-PARTICLES ; MINERAL-DUST ; DESERT DUST ; NUCLEI ; SIZE ; DEPOSITION ; IMMERSION ; TRANSPORT ; FELDSPAR ; IZANA
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/2XILL650/191571
作者单位1.Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, CH-8092 Zurich, Switzerland;
2.AEMET, Izana Atmospher Res Ctr, Tenerife, Spain;
3.Univ La Laguna, Fac Sci, Dept Chem TU Analyt Chem, Tenerife, Spain;
4.CSIC, Inst Environm Assessment & Water Res, Barcelona, Spain;
5.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Aerosol Res, Karlsruhe, Germany;
6.Paul Scherrer Inst, Lab Atmospher Chem, Villigen, Switzerland
推荐引用方式
GB/T 7714
Boose, Yvonne,Sierau, Berko,Isabel Garcia, M.,et al. Ice nucleating particles in the Saharan Air Layer[J],2016,16(14):9067-9087.
APA Boose, Yvonne.,Sierau, Berko.,Isabel Garcia, M..,Rodriguez, Sergio.,Alastuey, Andres.,...&Lohmann, Ulrike.(2016).Ice nucleating particles in the Saharan Air Layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,16(14),9067-9087.
MLA Boose, Yvonne,et al."Ice nucleating particles in the Saharan Air Layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 16.14(2016):9067-9087.
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