DOI: 10.1002/2015GL064068
论文题名: Seasonal variability of heterogeneous ice formation in stratiform clouds over the Amazon Basin
作者: Seifert P. ; Kunz C. ; Baars H. ; Ansmann A. ; Bühl J. ; Senf F. ; Engelmann R. ; Althausen D. ; Artaxo P.
刊名: Geophysical Research Letters
ISSN: 0094-9499
EISSN: 1944-9230
出版年: 2015
卷: 42, 期: 13 起始页码: 5587
结束页码: 5593
语种: 英语
英文关键词: aerosol effects on clouds
; Amazon Basin
; biomass burning aerosol
; heterogeneous ice formation
; long-term observations
; polarization lidar
Scopus关键词: Aerosols
; Atmospheric composition
; Biological materials
; Drought
; Dust
; Optical radar
; Polarization
; Aerosol effect
; Amazon basin
; Biomass-burning
; Ice formations
; Long term observations
; Ice
; aerosol composition
; ash
; backscatter
; biomass burning
; cloud
; data set
; heterogeneous medium
; lidar
; long-term change
; polarization
; seasonal variation
; smoke
; stratiform cloud
; suspended load
; Amazon Basin
; Amazonas [Brazil]
; Brazil
; Manaus
英文摘要: Based on 11months of polarization lidar observations in the Amazon Basin near Manaus, Brazil (2.3°S, 60°W), the relationship between temperature and heterogeneous ice formation efficiency in stratiform clouds was evaluated in the cloud top temperature range between -40 and 0°C. Between -30 and 0°C, ice-containing clouds are a factor of 1.5 to 2 more frequent during the dry season. Free-tropospheric aerosol backscatter profiles revealed a twofold to tenfold increase in aerosol load during the dry season and a Monitoring Atmospheric Composition and Climate - Interim Implementation reanalysis data set implies that the aerosol composition during the dry season is strongly influenced by biomass burning aerosol, whereas other components such as mineral dust do not vary strongly between the seasons. The injection of smoke accompanied by the likely dispersion of biological material, soil dust, or ash particles was identified as a possible source for the increased ice formation efficiency during the dry season. Key Points A unique 1year stratiform cloud data set was obtained for the Amazon Basin During the dry season, ice forms more efficient than during the wet season Biomass burning aerosols must be the source of ice nuclei during the dry season. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938205431&doi=10.1002%2f2015GL064068&partnerID=40&md5=b3c1276f07867c571259708ce66c8db2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9114
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: Leibniz Institute for Tropospheric Research, Leipzig, Germany
Recommended Citation:
Seifert P.,Kunz C.,Baars H.,et al. Seasonal variability of heterogeneous ice formation in stratiform clouds over the Amazon Basin[J]. Geophysical Research Letters,2015-01-01,42(13).