Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076357 |
Oxidative Processing Lowers the Ice Nucleation Activity of Birch and Alder Pollen | |
Gute, Ellen; Abbatt, Jonathan P. D. | |
2018-02-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:3页码:1647-1653 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Pollen carry water extractable compounds with ice nucleating (IN) activity. This study investigates whether the hydroxyl radical, as the major atmospheric oxidant, can affect the IN activity of silver birch and grey alder subpollen particles under in-cloud conditions for deposition freezing mode conditions at 234 K. It is found that oxidation increases the supersaturation ratio with respect to ice necessary for the onset of ice nucleation and decreases the fraction of particles which initiate ice nucleation. This reduction of IN activity under equivalent oxidation conditions does not occur with a mineral dust sample (Arizona Test Dust). Chemical analysis of fresh and oxidized pollen material indicates a change of molecular structure with a loss of conjugation and an increase in oxidized functional groups, such as carbonyls. This is the first demonstration that in-cloud oxidation may lower the IN abilities of biological particles such as pollen. |
英文关键词 | ice nucleating particle pollen ice clouds oxidation in-cloud hydroxyl radical |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426161800053 |
WOS关键词 | MINERAL DUST ; PARTICLES ; NUCLEI ; CONDENSATION ; PSEUDOMONAS ; CHEMISTRY ; IMMERSION ; RADICALS ; AEROSOLS ; CLIMATE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28305 |
专题 | 气候变化 |
作者单位 | Univ Toronto, Dept Chem, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Gute, Ellen,Abbatt, Jonathan P. D.. Oxidative Processing Lowers the Ice Nucleation Activity of Birch and Alder Pollen[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(3):1647-1653. |
APA | Gute, Ellen,&Abbatt, Jonathan P. D..(2018).Oxidative Processing Lowers the Ice Nucleation Activity of Birch and Alder Pollen.GEOPHYSICAL RESEARCH LETTERS,45(3),1647-1653. |
MLA | Gute, Ellen,et al."Oxidative Processing Lowers the Ice Nucleation Activity of Birch and Alder Pollen".GEOPHYSICAL RESEARCH LETTERS 45.3(2018):1647-1653. |
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