DOI: 10.1002/2014JD021567
论文题名: Ice nucleation of bare and sulfuric acid-coated mineral dust particles and implication for cloud properties
作者: Kulkarni G. ; Sanders C. ; Zhang K. ; Liu X. ; Zhao C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2014
卷: 119, 期: 16 起始页码: 9993
结束页码: 10011
语种: 英语
Scopus关键词: cloud
; cloud condensation nucleus
; coating
; dust
; ice crystal
; mineral
; nucleation
; parameterization
; relative humidity
; simulation
; sulfuric acid
; temperature profile
; water content
; Arizona
; United States
英文摘要: Ice nucleation properties of atmospherically relevant dust minerals coated with soluble materials are not yet well understood. We determined ice nucleation ability of bare and sulfuric acid-coated mineral dust particles as a function of temperature (-25 to -35°C) and relative humidity with respect to water (RHw; 75 to 110%) for five different mineral dust types: (1) Arizona test dust, (2) illite, (3) montmorillonite, (4) K-feldspar, and (5) quartz. The particles were dry dispersed and size selected at 200 nm, and we determined the fraction of dust particles nucleating ice at various temperatures and RHw. Under water-subsaturated conditions, compared to bare dust particles, we found that coated particles showed a reduction in their ice nucleation ability. Under water-supersaturated conditions, however, we did not observe a significant coating effect (i.e., the bare and coated dust particles had nearly similar nucleating properties). X-ray diffraction patterns of the coated particles indicated that acid treatment altered the crystalline nature of the surface and caused structural disorder; thus, we concluded that the lack of such structured order reduced the ice nucleation efficiency of the coated particles in deposition ice nucleation mode. In addition, our single column model results show that coated particles significantly modify cloud properties such as ice crystal number concentration and ice water content compared to bare particles in water-subsaturated conditions. However, in water-supersaturated conditions, cloud properties differ only at warmer temperatures. These modeling results imply that future aged dust particle simulations should implement coating parameterizations to accurately predict cloud properties. © 2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63070
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Atmospheric Sciences and Global Change Division, Pacific Northwest National, Laboratory, Richland, WA, United States; Environmental and Biological Sciences, Washington State University, Richland, WA, United States; Department of Atmospheric Sciences, University of Wyoming, Laramie, WY, United States
Recommended Citation:
Kulkarni G.,Sanders C.,Zhang K.,et al. Ice nucleation of bare and sulfuric acid-coated mineral dust particles and implication for cloud properties[J]. Journal of Geophysical Research: Atmospheres,2014-01-01,119(16)