DOI: 10.4209/aaqr.2019.03.0146
论文题名: Carbonaceous aerosol from open burning and its impact on regional weather in South Asia
作者: Singh P. ; Sarawade P. ; Adhikary B.
刊名: Aerosol and Air Quality Research
ISSN: 16808584
出版年: 2020
卷: 20, 期: 3 语种: 英语
英文关键词: Biomass burning
; Carbonaceous aerosol
; South Asia
; WRF-Chem
Scopus关键词: Aerosols
; Atmospheric humidity
; Atmospheric radiation
; Atmospheric temperature
; Atmospheric thermodynamics
; Biomass
; Boundary layer flow
; Boundary layers
; Fires
; Organic carbon
; Particulate emissions
; Surface properties
; Anthropogenic emissions
; Biomass-burning
; Carbonaceous aerosol
; National center for atmospheric researches
; Planetary boundary layers
; South Asia
; Weather research and forecasting models
; WRF-Chem
; Weather forecasting
; aerosol
; anthropogenic source
; biomass burning
; black carbon
; boundary layer
; radiative forcing
; regional climate
; India
; Myanmar
; Punjab
; Punjab [India]
英文摘要: Seasonal open biomass burning contributes to significant carbonaceous aerosol loading over South Asia. This study analyzes long-term trends in emissions in two hot spot regions, Myanmar and Punjab, based on data from the Global Fire Emissions Database (GFED4s) and Fire INventory (FINN) from the National Center for Atmospheric Research (NCAR). Our analysis reveals that emissions during active fire seasons increase by approximately 83–106% and 2338–3054% for Punjab and Myanmar, respectively, compared to the estimates of anthropogenic emissions obtained with FINN. We also examine the impact of carbonaceous aerosol from open biomass burning on regional weather by using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) to conduct a year-long simulation of the post-monsoon and pre-monsoon periods when active fires were reported. The results indicate that the carbonaceous aerosol is vertically lofted by as much as 3–5 km into the atmosphere and, rising as high as the 850 hPa level from the surface, disperses horizontally throughout South Asia. Our calculations on the radiative forcing suggest that changes of up to –6.14 W m–2 and –0.50 W m–2, and –42.76 W m–2 and –1.91 W m–2 occur at the surface and at the top of the atmosphere over Punjab and Myanmar, respectively. We also find that carbonaceous aerosol (black carbon + organic carbon), similar to black carbon (BC), reduces the surface temperature, despite the scattering effects of organic carbon (OC). Overall, open biomass burning causes the surface temperature to decrease by 2 K, the relative humidity to increase by 8% and the planetary boundary layer height to change by as much as 600 m. Changes in the precipitation patterns and volume due to the carbonaceous aerosol from open biomass burning, however, are negligible when considering only the direct radiative feedback. © Taiwan Association for Aerosol Research.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159111
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Physics, University of Mumbai, Mumbai, 400098, India; International Centre for Integrated Mountain Development (ICIMOD), Khumaltar, Lalitpur, Nepal
Recommended Citation:
Singh P.,Sarawade P.,Adhikary B.. Carbonaceous aerosol from open burning and its impact on regional weather in South Asia[J]. Aerosol and Air Quality Research,2020-01-01,20(3)