DOI: 10.1016/j.atmosres.2019.01.013
Scopus记录号: 2-s2.0-85060104810
论文题名: Aerosol and cloud droplet characteristics over Ganges Valley during break phase of monsoon: A case study
作者: Varghese M. ; Prabha T.V. ; Murugavel P. ; Anu A.S. ; Resmi E.A. ; Dinesh G. ; Jaya Rao Y. ; Nagare B. ; Safai P.D. ; Nair S. ; Nandakumar K. ; Vishnu R. ; Bhavani Kumar Y.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 220 起始页码: 125
结束页码: 140
语种: 英语
英文关键词: Aerosol dome
; CAIPEEX
; Droplet spectrum
; EDX
; Haze
; TEM
Scopus关键词: Aerosols
; Aggregates
; Atmospheric thermodynamics
; Boundary layers
; Clouds
; Domes
; Drops
; Energy dispersive spectroscopy
; Heavy metals
; Light scattering
; Precipitation (meteorology)
; Radioactive elements
; Size distribution
; Transmission electron microscopy
; CAIPEEX
; Deep convective clouds
; Drop size distribution
; Droplet size distributions
; Droplet spectrums
; Haze
; Precipitation enhancement
; Single-particle analysis
; Air pollution
; aerosol
; boundary layer
; cloud droplet
; cumulus
; haze
; monsoon
; size distribution
; transmission electron microscopy
; vertical profile
; Gangetic Plain
英文摘要: Unique airborne observations made ≅330 km south of Mt. Everest during the Cloud-Aerosol Interaction Precipitation Enhancement EXperiment (CAIPEEX) 2014 are presented in this case study. These observations provide the vertical profile and elemental composition of aerosols from single particle analysis during the break period. An “aerosol dome” was also documented from the horizontal transect across the Varanasi city. The boundary layer was dominated by light scattering fine mode aerosols mainly a mixture of dust and pollution. The individual particle characterization revealed complex mixing states within the same aerosol aggregate. Externally mixed aerosols were present at the cloud bases. Elemental composition of aerosol particles collected from free atmosphere contained signatures of aged pollution with heavy metals, carbonaceous particles and radioactive elements. Cloud processed aerosols were also noted in the neighborhood of deep convective clouds. Shallow and deep cumulus clouds developing in the haze layer revealed distinct dropsize distributions. Shallow cumulus clouds embedded in the haze layer showed narrow droplet size distribution and were narrower than the ones observed for premonsoon conditions. Deep cumulus tops in the neighborhood of rapidly developing convection showed broad, bimodal droplet size distribution attributing to droplet evaporation and entrainment effects. Aerosol sampling near these cloud tops showed aggregates of particles that are internally mixed. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122300
Appears in Collections: 气候变化事实与影响
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作者单位: Indian Institute of Tropical Meteorology, Pune, Maharashtra, India; National Centre for Earth Science Studies, Thiruvananthapuram, India; Gadanki, Andhra Pradesh, India; International and Inter University Centre for Nanoscience and Nanotechnology, Kottayam, Kerala, India
Recommended Citation:
Varghese M.,Prabha T.V.,Murugavel P.,et al. Aerosol and cloud droplet characteristics over Ganges Valley during break phase of monsoon: A case study[J]. Atmospheric Research,2019-01-01,220