DOI: 10.1016/j.atmosenv.2015.04.063
Scopus记录号: 2-s2.0-84928725849
论文题名: Multi-sensor quantification of aerosol-induced variability in warm clouds over eastern China
作者: Wang F ; , Guo J ; , Zhang J ; , Huang J ; , Min M ; , Chen T ; , Liu H ; , Deng M ; , Li X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 113 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: Aerosol
; Aerosol indirect effect
; Caliop
; Mixing state
Scopus关键词: Adaptive optics
; Atmospheric aerosols
; Drops
; Mixing
; Radiometers
; Aerosol indirect effect
; Aerosol optical depths
; Aerosol particles
; Caliop
; Cloud observations
; Frequency profiles
; Mixing state
; Saturation zones
; Aerosols
; aerosol property
; cloud droplet
; optical depth
; saturation
; seasonality
; sensor
; aerosol
; altitude
; Article
; China
; cloud
; optical depth
; priority journal
; seasonal variation
; summer
; winter
; China
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Aerosol-cloud (AC) interactions remain uncharacterized due to difficulties in obtaining accurate aerosol and cloud observations. In this study, we quantified the aerosol indirect effects (AIE) on warm clouds over Eastern China based on near-simultaneous retrievals from MODIS/AQUA, CALIOP/CALIPSO, and CPR/CLOUDSAT between June 2006 and December 2010. The seasonality of aerosols from ground-based PM10 (aerosol particles with diameter of 10μm or less) significantly differed from that estimated using MODIS aerosol optical depth (AOD). This result was supported by the lower level frequency profile of aerosol occurrence from CALIOP, indicative of the significant role of CALIOP in the AC interaction. To focus on warm clouds, cloud layers with base (top) altitudes above 7 (10) km were excluded. The combination of CALIOP and CPR was applied to determine the exact position of warm clouds relative to aerosols out of the following six scenarios in terms of AC mixing states: 1) aerosol only (AO); 2) cloud only (CO); 3) single aerosol layer-single cloud layer (SASC); 4) single aerosol layer-double cloud layers (SADC); 5) double aerosol layers - single cloud layer (DASC); and 6) others. The cases with vertical distance between aerosol and cloud layer less (more) than 100m (700m) were marked mixed (separated), and the rest as uncertain. Results showed that only 8.95% (7.53%) belonged to the mixed (separated and uncertain) state among all of the collocated AC overlapping cases, including SASC, SADC, and DASC. Under mixed conditions, the cloud droplet effective radius (CDR) decreased with increasing AOD at moderate aerosol loading (AOD<0.4), and then became saturated at an AOD of around 0.5, followed by an increase in CDR with increasing AOD, known as boomerang shape. Under separated conditions, no apparent changes in CDR with AOD were observed. We categorized the AC dataset into summer- and winter-season subsets to determine how the boomerang shape varied with season. The response of CDR to AOD in summer exhibited similar but much more deepened boomerang shape, as compared with the all year round case. In contrast, CDR in winter did not follow the boomerang shape for its continued decreasing with increasing AOD, even after the saturation zone (AOD around 0.5) of a cloud droplet. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81717
Appears in Collections: 气候变化事实与影响
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作者单位: School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu, China; Institute of Atmosphere Composition, Chinese Academy of Meteorological Sciences, Beijing, China; Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China; ESSIC, University of Maryland, College Park, MD, United States; National Satellite Meteorological Center, Beijing, China; CGCESS, Beijing Normal University, Beijing, China; School of Geography, Beijing Normal University, Beijing, China
Recommended Citation:
Wang F,, Guo J,, Zhang J,et al. Multi-sensor quantification of aerosol-induced variability in warm clouds over eastern China[J]. Atmospheric Environment,2015-01-01,113