| DOI: | 10.1002/2015GL064060
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| 论文题名: | Pollen as atmospheric cloud condensation nuclei |
| 作者: | Steiner A.L.; Brooks S.D.; Deng C.; Thornton D.C.O.; Pendleton M.W.; Bryant V.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9478
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| EISSN: | 1944-9209
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| 出版年: | 2015
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| 卷: | 42, 期:9 | | 起始页码: | 3596
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| 结束页码: | 3602
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| 语种: | 英语
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| 英文关键词: | cloud condensation nuclei
; organic aerosol
; pollen
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| Scopus关键词: | Optical properties
; Cloud condensation nuclei
; Cloud formation
; Cloud optical properties
; Coarse particles
; Compositional analysis
; Organic aerosol
; Pollen
; Surface layers
; Condensation
; aerosol composition
; cloud condensation nucleus
; concentration (composition)
; particle size
; pollen
; supersaturation
; surface layer
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| 英文摘要: | Anemophilous (wind-dispersed) pollen grains are emitted in large quantities by vegetation in the midlatitudes for reproduction. Pollen grains are coarse particles (5-150μm) that can rupture when wet to form submicron subpollen particles (SPP) that may have a climatic role. Laboratory CCN experiments of six fresh pollen samples show that SPP activate as CCN at a range of sizes, requiring supersaturations from 0.81 (±0.07)% for 50 nm particles, 0.26 (±0.03)% for 100nm particles, and 0.12 (±0.00)% for 200nm particles. Compositional analyses indicate that SPP contain carbohydrates and proteins. The SPP contribution to global CCN is uncertain but could be important depending on pollen concentrations outside the surface layer and the number of SPP generated from a single pollen grain. The production of hygroscopic SPP from pollen represents a novel, biologically driven cloud formation pathway that may influence cloud optical properties and lifetimes, thereby influencing climate. Key Points Pollen grains can rupture when wet to form submicron subpollen particles (SPP) Laboratory experiments show that SPP are hygroscopic and can act as CCN Pollen grains may contribute to CCN in northern midlatitudes ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930485130&doi=10.1002%2f2015GL064060&partnerID=40&md5=29d8764288523d61d9b3a3fdc4d78c14
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9093
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, United States
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| Recommended Citation: | |
Steiner A.L.,Brooks S.D.,Deng C.,et al. Pollen as atmospheric cloud condensation nuclei[J]. Geophysical Research Letters,2015-01-01,42(9).
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