DOI: 10.1002/jgrd.503502013
论文题名: Two years of free-tropospheric aerosol layers observed over Portugal by lidar
作者: Preißler J. ; Wagner F. ; Guerrero-Rascado J.L. ; Silva A.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 9 起始页码: 3676
结束页码: 3686
语种: 英语
Scopus关键词: Dust
; Optical radar
; Troposphere
; Aerosol characterization
; Aerosol layers
; Anthropogenic aerosols
; Biomass burning smokes
; Free troposphere
; Iberian Peninsula
; Large particles
; Multiwavelength
; Aerosols
; aerosol
; anthropogenic source
; backscatter
; biomass burning
; dust
; lidar
; optical property
; sea level change
; troposphere
; wavelength
; Asia
; Portugal
; Sahara
英文摘要: Multi-wavelength Raman light detection and ranging (lidar) observations were analyzed, which were performed in Évora, Portugal, during more than 2 years on a regular basis in the framework of the European Aerosol Research Lidar Network (EARLINET). An aerosol characterization in terms of the lidar ratios at 355 and 532 nm and the extinction and backscatter related Ångström exponents is presented. Aerosol layers in the free troposphere were classified according to their origin. Clear differences in the intensive optical properties were found for layers of mineral dust from the Sahara and from Asia, of anthropogenic aerosol from Europe and from North America, as well as of biomass burning smoke from the Iberian Peninsula and from North America, respectively. In general, the mean Ångström exponents of aerosol layers of the same type, but from closer source regions, were smaller than those from aerosol layers transported over a longer distance. This hints at the deposition of large particles along the transportation path, especially for anthropogenic aerosol and mineral dust. Besides, the seasonal behavior of aerosol in the free troposphere over Évora was studied. Seventy-three percent of the detected layers were observed during spring and summer. On average, the layers were highest in summer with an overall mean layer height of (3.8?1.9) km above sea level (asl), and lowest in winter with (2.3?0.9) km asl. © 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/63496
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Évora Geophysics Center, Rua Romão Ramalho 59, 7000 Évora, Portugal; Andalusian Center for Environmental Research (CEAMA), University of Granada Autonomous Government of Andalusia, Granada, Spain; Department of Applied Physics, University of Granada, Granada, Spain
Recommended Citation:
Preißler J.,Wagner F.,Guerrero-Rascado J.L.,et al. Two years of free-tropospheric aerosol layers observed over Portugal by lidar[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(9)