title: Characterization of aerosols from biomass burning--a case study from Mizoram (Northeast), India.
abstract: Physical and optical properties of biomass burning aerosols in Northeastern region, India analyzed based on measurements made during February 2002. Large spatial extent of Northeastern Region moist tropical to moist sub-tropical forests in India have high frequency of burning in annual dry seasons. Characterization of resultant trace gases and aerosols from biomass burning is important for the atmospheric radiative process. Aerosol optical depth (AOD) observed to be high during burning period compared to pre- and post-burning days. Peak period of biomass burning is highly correlated with measured AOD and total columnar water vapor. Size distribution of aerosols showed bimodal size distribution during burning day and unimodal size distribution during pre- and post-burning days. Size distribution retrievals from biomass burning aerosols show dominance of accumulation mode particles. Weighted mean radius is high (0.22 microm) during burning period. Columnar content of aerosols observed to be high during burning period in addition to the drastic reduction of visibility. During the burning day Anderson sampler measurements showed dominance of accumulation mode particles. The diurnal averaged values of surface shortwave aerosol radiative forcing af biomass burning aerosols varies from -59 to -87 Wm(-2) on different days. Measured and modeled solar irradiances are also discussed in the paper.
authors.affiliation: National Remote Sensing Agency, Department of Space--Government of India, Balanagar, Hyderabad 500 037, India. badrinath_kvs@nrsa.gov.in
authors.forename: K V S
authors.initials: KV
authors.lastname: Badarinath
authors.forename: K
authors.initials: K
authors.lastname: Madhavi Latha
authors.forename: T R
authors.initials: TR
authors.lastname: Kiran Chand
authors.forename: Prabhat K
authors.initials: PK
authors.lastname: Gupta
authors.forename: A B
authors.initials: AB
authors.lastname: Ghosh
authors.forename: S L
authors.initials: SL
authors.lastname: Jain
authors.forename: B S
authors.initials: BS
authors.lastname: Gera
authors.forename: Risal
authors.initials: R
authors.lastname: Singh
authors.forename: A K
authors.initials: AK
authors.lastname: Sarkar
authors.forename: Nahar
authors.initials: N
authors.lastname: Singh
authors.forename: R S
authors.initials: RS
authors.lastname: Parmar
authors.forename: S
authors.initials: S
authors.lastname: Koul
authors.forename: R
authors.initials: R
authors.lastname: Kohli
authors.forename: Shambhu
authors.initials: S
authors.lastname: Nath
authors.forename: V K
authors.initials: VK
authors.lastname: Ojha
authors.forename: Gurvir
authors.initials: G
authors.lastname: Singh
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D018533:Biomass; D004784:Environmental Monitoring; D017745:Incineration; D007194:India; D008956:Models, Chemical; D010316:Particle Size; D012993:Solar Energy
chemical_list: D000393:Air Pollutants