Arid
DOI10.1002/2015JD023270
Effects of aerosol sources and chemical compositions on cloud drop sizes and glaciation temperatures
Zipori, Assaf1; Rosenfeld, Daniel1; Tirosh, Ofir1; Teutsch, Nadya2; Erel, Yigal1
通讯作者Zipori, Assaf
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2015
卷号120期号:18页码:9653-9669
英文摘要

The effect of aerosols on cloud properties, such as its droplet sizes and its glaciation temperatures, depends on their compositions and concentrations. In order to examine these effects, we collected rain samples in northern Israel during five winters (2008-2011 and 2013) and determined their chemical composition, which was later used to identify the aerosols’ sources. By combining the chemical data with satellite-retrieved cloud properties, we linked the aerosol types, sources, and concentrations with the cloud glaciation temperatures (T-g). The presence of dust increased T-g from -26 degrees C to -12 degrees C already at relatively low dust concentrations. This result is in agreement with the conventional wisdom that desert dust serves as good ice nuclei (INs). With higher dust concentrations, T-g saturated at -12 degrees C, even though cloud droplet sizes decreased as a result of the cloud condensation nucleating (CCN) activity of the dust. Marine air masses also encouraged freezing, but in this case, freezing was enhanced by the larger cloud droplet sizes in the air masses (caused by low CCN concentrations) and not by IN concentrations or by aerosol type. An increased fraction of anthropogenic aerosols in marine air masses caused a decrease in T-g, indicating that these aerosols served as poor IN. Anthropogenic aerosols reduced cloud droplet sizes, which further decreased T-g. Our results could be useful in climate models for aerosol-cloud interactions, as we investigated the effects of aerosols of different sources on cloud properties. Such parameterization can simplify these models substantially.


英文关键词precipitation chemistry aerosol-cloud interaction cloud glaciation
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000363425900036
WOS关键词SECONDARY ICE PARTICLES ; MIXED-PHASE CLOUDS ; ATMOSPHERIC AEROSOLS ; CONVECTIVE CLOUDS ; TRACE-ELEMENTS ; MINERAL DUST ; PB ISOTOPES ; SEA SPRAY ; DEAD-SEA ; PRECIPITATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构Hebrew University of Jerusalem
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188694
作者单位1.Hebrew Univ Jerusalem, Fredy & Nadine Herrmann Inst Earth Sci, Jerusalem, Israel;
2.Geol Survey Israel, IL-95501 Jerusalem, Israel
推荐引用方式
GB/T 7714
Zipori, Assaf,Rosenfeld, Daniel,Tirosh, Ofir,et al. Effects of aerosol sources and chemical compositions on cloud drop sizes and glaciation temperatures[J]. Hebrew University of Jerusalem,2015,120(18):9653-9669.
APA Zipori, Assaf,Rosenfeld, Daniel,Tirosh, Ofir,Teutsch, Nadya,&Erel, Yigal.(2015).Effects of aerosol sources and chemical compositions on cloud drop sizes and glaciation temperatures.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,120(18),9653-9669.
MLA Zipori, Assaf,et al."Effects of aerosol sources and chemical compositions on cloud drop sizes and glaciation temperatures".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 120.18(2015):9653-9669.
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