DOI: 10.1002/jgrd.50801
论文题名: Biological aerosol particles as a key determinant of ice nuclei populations in a forest ecosystem
作者: Tobo Y. ; Prenni A.J. ; Demott P.J. ; Huffman J.A. ; McCluskey C.S. ; Tian G. ; Pöhlker C. ; Pöschl U. ; Kreidenweis S.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 17 起始页码: 10100
结束页码: 10110
语种: 英语
英文关键词: biological aerosol particles
; forest ecosystem
; ice nucleation
; ice nuclei
; mixed-phase clouds
Scopus关键词: Aerosols
; Atmospheric temperature
; Ecosystems
; Forestry
; Nucleation
; Biological Aerosol
; Forest ecosystem
; Ice nucleation
; Ice nuclei
; Mixed-phase cloud
; Ice
; aerosol
; concentration (composition)
; correlation
; forest ecosystem
; nucleation
; temperature effect
英文摘要: Certain primary biological aerosol particles (PBAPs) are known to have very high ice nucleating ability under mixed-phase cloud conditions. However, since the abundances of ice nucleation active PBAPs in the atmosphere are generally thought to be extremely small, their importance has remained uncertain. Here we present evidence for the role of PBAPs as atmospheric ice nuclei (IN) active at temperatures ranging from about -34°C to -9°C in a midlatitude ponderosa pine forest ecosystem in summertime. Our measurements show that the number concentrations of IN active at these temperatures were positively correlated with number concentrations of ambient fluorescent biological aerosol particles (FBAPs). Notably, the number concentrations of IN active at warmer temperatures increased quite rapidly in response to increases in the number concentrations of FBAPs. Moreover, we show that a newly-proposed parameterization related to the number concentrations of FBAPs can better reproduce the number concentrations of IN active over the entire temperature range examined, as compared with parameterizations related solely to the number concentrations of total aerosol particles with diameters larger than 0.5 μm as proposed previously. These results suggest that certain PBAPs released from forest biota can indeed play a key role in determining atmospheric IN populations in this ecosystem, especially at warmer temperatures, potentially leading to ice initiation in nearby mixed-phase clouds. Key Points Ice nuclei and biological aerosol particles were measured in a forest ecosystemIce nuclei showed a positive correlation with biological aerosol particlesBiological ice nuclei might be important in determining ice nuclei populations ©2013. 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/63346
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Atmospheric Science, Colorado State University, 1371 Campus Delivery, Fort Collins, CO 80523, United States; Department of Chemistry and Biochemistry, University of Denver, Denver, CO, United States; Biogeochemistry and Multiphase Chemistry Departments, Max Planck Institute for Chemistry, Mainz, Germany
Recommended Citation:
Tobo Y.,Prenni A.J.,Demott P.J.,et al. Biological aerosol particles as a key determinant of ice nuclei populations in a forest ecosystem[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(17)