DOI: 10.1002/jgrd.50274
论文题名: Aerosol characteristics observed in southeast Queensland and implications for cloud microphysics
作者: Tessendorf S.A. ; Weeks C.E. ; Axisa D. ; Bruintjes R.T.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 7 起始页码: 2858
结束页码: 2871
语种: 英语
Scopus关键词: Nucleation
; Regression analysis
; Research aircraft
; Trajectories
; Aerosol characteristics
; Aerosol concentration
; Back-trajectory models
; Brisbane , Australia
; Influential factors
; Microphysical measurements
; Particle concentrations
; Synoptic weather conditions
; Aerosols
; aerosol property
; air mass
; airborne survey
; climatology
; cloud droplet
; cloud microphysics
; coastal zone
; marine atmosphere
; nucleation
; thermodynamics
; trajectory
; Australia
; Brisbane
; Queensland
英文摘要: Regular cloud base aerosol measurements were collected by a research aircraft over a 4 month period during the wet season in southeast Queensland, near Brisbane, Australia. In situ cloud microphysical measurements were also collected in many of these clouds. Brisbane is situated on the east coast of Australia and, depending on the synoptic weather conditions, can experience influences from inland or from the adjacent ocean. In situ aerosol measurements were used to compile a climatology of the aerosol conditions in the region and a back trajectory model was run for 120 h from each measurement to determine the possible air mass influences on each measurement. The most influential factor on the measured aerosol concentrations was the time the trajectory spent over land beneath 2 km (a proxy for the boundary layer). Using this criterion, the measurements were divided into two regimes: maritime for those with minimal time histories over land and continental for the remainder. Other influential factors on the aerosol concentration were also diagnosed and quantified with a regression model, including the proximity of the trajectory to the city of Brisbane and the number of fires along the trajectory. Thermodynamic, aerosol, and cloud microphysical characteristics are presented for each regime. The maritime regime tended to have more coarse mode (larger) aerosol particles and a tail of larger drops in the cloud base droplet spectra, which could be due to nucleation on the larger aerosol particles. The city influence on maritime regime trajectories yielded enhanced nucleation (fine) particle concentrations. © 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/63832
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: National Center for Atmospheric Research, Research Applications Laboratory, P.O. Box 3000, Boulder, CO 80307, United States
Recommended Citation:
Tessendorf S.A.,Weeks C.E.,Axisa D.,et al. Aerosol characteristics observed in southeast Queensland and implications for cloud microphysics[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(7)