Arid
DOI10.1038/NGEO521
In situ detection of biological particles in cloud ice-crystals
Pratt, Kerri A.2; DeMott, Paul J.1; French, Jeffrey R.3; Wang, Zhien3; Westphal, Douglas L.4; Heymsfield, Andrew J.5; Twohy, Cynthia H.6; Prenni, Anthony J.1; Prather, Kimberly A.2,7
通讯作者DeMott, Paul J.
来源期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2009
卷号2期号:6页码:397-400
英文摘要

The impact of aerosol particles on the formation and properties of clouds is one of the largest remaining sources of uncertainty in climate change projections(1). Certain aerosol particles, known as ice nuclei, initiate ice-crystal formation in clouds, thereby affecting precipitation and the global hydrological cycle(2). Laboratory studies suggest that some mineral dusts and primary biological particles-such as bacteria, pollen and fungi-can act as ice nuclei(3). Here we use aircraft-aerosol time-of-flight spectrometry to directly measure the chemistry of individual cloud ice-crystal residues (obtained after evaporation of the ice), which were sampled at high altitude over Wyoming. We show that biological particles and mineral dust comprised most of the ice-crystal residues: mineral dust accounted for similar to 50% of the residues and biological particles for similar to 33%. Along with concurrent measurements of cloud ice-crystal and ice-nuclei concentrations, these observations suggest that certain biological and dust particles initiated ice formation in the sampled clouds. Finally, we use a global aerosol model to show long-range transport of desert dust, suggesting that biological particles can enhance the impact of desert dust storms on the formation of cloud ice.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000266543200014
WOS关键词FLOW DIFFUSION CHAMBER ; ATMOSPHERIC PROCESSES ; MASS-SPECTROMETRY ; MINERAL DUST ; NUCLEI ; MICROBIOLOGY
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/162010
作者单位1.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA;
2.Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA;
3.Univ Wyoming, Dept Atmospher Sci, Laramie, WY 82071 USA;
4.USN, Res Lab, Marine Meteorol Div, Monterey, CA 93943 USA;
5.Natl Ctr Atmospher Res, Mesoscale & Microscale Meteorol Div, Boulder, CO 80305 USA;
6.Oregon State Univ, Dept Ocean & Atmospher Sci, Corvallis, OR 97331 USA;
7.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
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GB/T 7714
Pratt, Kerri A.,DeMott, Paul J.,French, Jeffrey R.,et al. In situ detection of biological particles in cloud ice-crystals[J]. Colorado State University,2009,2(6):397-400.
APA Pratt, Kerri A..,DeMott, Paul J..,French, Jeffrey R..,Wang, Zhien.,Westphal, Douglas L..,...&Prather, Kimberly A..(2009).In situ detection of biological particles in cloud ice-crystals.NATURE GEOSCIENCE,2(6),397-400.
MLA Pratt, Kerri A.,et al."In situ detection of biological particles in cloud ice-crystals".NATURE GEOSCIENCE 2.6(2009):397-400.
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