DOI: 10.1029/2017JD028205
Scopus记录号: 2-s2.0-85046289428
论文题名: Quantification of Observed Electrical Effect on the Raindrop Size Distribution in Tropical Clouds
作者: Mudiar D. ; Pawar S.D. ; Hazra A. ; Konwar M. ; Gopalakrishnan V. ; Srivastava M.K. ; Goswami B.N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 9 起始页码: 4527
结束页码: 4544
语种: 英语
英文关键词: drop size distribution
; electric field
; tropical clouds
Scopus关键词: climate modeling
; cloud cover
; droplet
; electric field
; measurement method
; observational method
; quantitative analysis
; radar
; raindrop
; rainfall
; size distribution
; stratiform cloud
; vertical profile
英文摘要: In the backdrop of extensive laboratory and theoretical evidence of broadening of the drop size distribution (DSD) of raindrops in the presence of electric field, quantification of the same in observed tropical clouds is lacking. Here this is quantified using the DSD measured by a microrain radar at 2,400-, 1,200-, and 600-m heights from the surface in six strongly electrified and six weakly electrified stratiform rain events together with the DSD of raindrops at the surface measured by a disdrometer for the same cases. The presence/absence of lightning is used to distinguish between strongly and weakly electrified events. The vertical profile of Median Volume Diameter below the melting layer and DSDs at all three heights for strongly electrified events and weakly electrified events are significantly different from each other, consistent with previous laboratory and numerical studies (Rayleigh, 1879; Davis, 1964; Moore et al., 1964, https://doi.org/10.1175/1520-0469(1964)021<0646:GORAMA>2.0.CO;2). Our results indicate that the electric field and surface charge of raindrops can affect the collision-coalescence process and breakup characteristics of raindrops. Our study suggests that the parameterization of electrical processes in weather/climate models can possibly improve the simulation of tropical rainfall in numerical models as well as a proper representation of DSD will improve the estimation of tropical rainfall in airborne measurements. ©2018. 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/113887
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Indian Institute of Tropical Meteorology, Pune, India; Department of Geophysics, Banaras Hindu University, Varanasi, India; Department of Physics, Cotton University, Guwahati, India
Recommended Citation:
Mudiar D.,Pawar S.D.,Hazra A.,et al. Quantification of Observed Electrical Effect on the Raindrop Size Distribution in Tropical Clouds[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(9)