Long-range transport of aerosols from agriculture crop residue burning in Indo-Gangetic Plains—A study using LIDAR, ground measurements and satellite data

Badarinath, K. V. S.; Kharol, Shailesh Kumar; Sharma, Anu Rani

doi:10.1016/j.jastp.2008.09.035

Cited by 231 publications

(154 citation statements)

References 41 publications

(41 reference statements)

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“…It is well-known that light attenuation coefficient, b ATN is generally larger than light absorption coefficient, b abs due to optical interactions of the filter substrate with the deposited aerosol (Petzold et al, 1997;Kopp et al, 1999;Ballach et al, 2001;Weingartner et al, 2003;Arnott et al, 2005). The most significant filter-particle interactions and the resulting biases are: (1) multiple scattering of light by the filter fibers enhances the optical path length, resulting in positive bias on b ATN , (2) enhanced absorption of scattered light with increasing filter loading reduces the optical path length, so called "shadowing effect", which reduces b ATN , and (3) the filter reflectance (scattering in backwards hemisphere) and hence the measured attenuation depends on the optical properties of the deposited particles (bias in b ATN depends on physicochemical properties of the particles).…”

Section: Methodsmentioning

confidence: 99%

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Spectral optical properties of long-range transport Asian dust and pollution aerosols over Northeast Asia in 2007 and 2008

et al. 2010

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Abstract. As a part of the IGAC (International Global Atmospheric Chemistry) Mega-cities program, aerosol physical and optical properties were continuously measured from March 2007 to March 2008 at an urban site (37.57 • N, 126.94 • E) in Seoul, Korea. Spectral optical properties of long-range transported Asian dust and pollution aerosols have been investigated based on the year long measurement data. Optically measured black carbon/thermally measured elemental carbon (BC/EC) ratio showed clear monthly variation with high values in summer and low values in winter mainly due to the enhancement of light attenuation by the internal mixing of EC. Novel approach has been suggested to retrieve the spectral light absorption coefficient (b abs ) from Aethalometer raw data by using BC/EC ratio. Mass absorption efficiency, σ abs (= b abs /EC) at 550 nm was determined to be 9.0±1.3, 8.9±1.5, 9.5±2.0, and 10.3±1.7 m 2 g −1 in spring, summer, fall, and winter, respectively with an annual mean of 9.4±1.8 m 2 g −1 . Threshold values to classify severe haze events were suggested in this study. Increasing trend of aerosol single scattering albedo (SSA) with wavelength was observed during Asian dust events while little spectral dependence of SSA was observed during long-range transport pollution (LTP) events. Satellite aerosol optical thickness (AOT) and Hysplit air mass backward trajectory analyses as well as chemical analysis were performed to characterize the dependence of spectral optical properties on aerosol type. Results from this study can provide useful information for studies on regional air quality and aerosol's effects on climate change.

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Section: Methodsmentioning

confidence: 99%

“…α s was determined to be 1.13, 1.08, 1.24, and 1.12 in spring, summer, fall, and winter, respectively. Highest α s in fall indicates the dominance of freshly emitted fine particle such as postharvest biomass burning (Balis et al, 2003;Lee et al, 2005;Badarinath et al, 2009;Ryu et al, 2006).…”

Section: Retrieval Of Spectral Scattering Coefficient Of Atmospheric mentioning

confidence: 99%

Spectral optical properties of long-range transport Asian dust and pollution aerosols over Northeast Asia in 2007 and 2008

et al. 2010

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“…However, over land, some hot-spot areas of enhanced AI still exist (autumn and winter), such as the Hamoun basin/lakes,southern Afghanistan and some areas in the Arabian Peninsula. The increased AI observed in autumn over northeastern Pakistan is rather associated with biomass burning aerosols, and not with dust, since this is the season of crop-residue burning over Punjab (Badarinath et al, 2009;Sharma et al, 2010). The spatial distribution of monthly OMI-AI (Fig.…”

Section: Spatial Distribution Of Aerosols Over Southwest Asia and Sistanmentioning

confidence: 99%

Spatio-temporal variability of dust aerosols over the Sistan region in Iran based on satellite observations

et al. 2013

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Satellite remote sensing provides important observational constraints for monitoring dust life cycle and improving the understanding of its effects on local to global scales. The present work analyses the dust-aerosol patterns over the arid environment of the Sistan region-in southeastern Iran, by means of multiple satellite platforms aiming to reveal the spatiotemporal distribution and trends. The dataset includes records of Aerosol Index (AI) from Total Ozone Mapping Spectrometer (TOMS) and 6-year AI records from the Ozone Monitoring Instrument (OMI) aboard Aura. Moreover, the aerosol optical depth (AOD) is analyzed through 11-year records from Multi-angle Imaging Spectro-Radiometer (MISR) aboard Terra (2000Terra ( -2010 and from Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Terra (2000Terra ( -2007 and Aqua (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011). The main focus is to determine similarities and differences in dust variability over southwest Asia, in general, and the Sistan region, in particular. The results show a marked seasonal cycle with high aerosol loading during summer and lower in winter, while MISR, MODIS and TOMS/OMI observations agree in both terms of monthly and seasonally mean spatial and temporal patterns. The higher aerosol concentrations during summer are interpreted as a result of the combined effect of the seasonal drying of the Hamoun lakes and the strong northerly Levar winds favoring dust erosion from the alluvial deposits in Sistan . After prolonged drought period, the dust-aerosol load over the area has increased in the beginning of the 2000s and decreased after 2004, 2 thereby leading to an overall declining trend during the last decade. Such a trend is absent during the winter period when dust emission over the region is minimal.

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“…As per Census India report in 2011, the populations of Hisar and Allahabad are 0.3 and 1.2 million, respectively. Both sites are located in a highly agriculture productive region of India and high level of pollution is observed from the burning of cow-dung, agricultural waste and wood-fuel used for residential heating purposes (Badarinath et al, 2009).…”

Section: Sampling Locations Aerosol Collection and Meteorological Dementioning

confidence: 99%

Carbonaceous and Secondary Inorganic Aerosols during Wintertime Fog and Haze over Urban Sites in the Indo-Gangetic Plain

Ram

Sarin

Sudheer

et al. 2012

Aerosol Air Qual. Res.

141

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The chemical composition of total suspended particulate (TSP) matter and secondary aerosol formation have been studied during wintertime fog and haze events from urban sites (Allahabad and Hisar) in the Indo-Gangetic Plain. The atmospheric abundances of elemental carbon (EC), organic carbon (OC), water-soluble OC (WSOC) suggest that organic matter is a major component of TSP, followed by concentrations of sulphate and nitrate under varying meteorological conditions. The concentrations of EC, OC, and WSOC show a nearly 30% increase during fog and haze events at Allahabad and a marginal increase at Hisar; whereas inorganic constituents (NH 4 + , NO 3 − and SO 4 2− ) are 2-3 times higher than those during clear days at both the locations. The sulphur and nitrogen oxidation ratios (SOR and NOR) also exhibit significant increases suggesting possible enhancement of secondary formation of SO 4 2− and NO 3 − during fog and haze events. The significant correlation between NH 4 + -SO 4 2− (R 2 = 0.66, n = 61) and an NH 4 + /SO 4 2− equivalent ratio ≥ 1 during fog-haze conditions suggest nearcomplete neutralization of sulphuric acid by ammonia. In contrast, NH 4 + /SO 4 2− equivalent ratios are less than 1 during normal days suggesting an NH 3 -deficient environment and the possible association of SO 4 2− with mineral dust for neutralization. Secondary inorganic aerosol formation and their hygroscopic growth can have significant impact on atmospheric chemistry, air-quality and visibility impairment during fog-haze events over northern India.

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Long-range transport of aerosols from agriculture crop residue burning in Indo-Gangetic Plains—A study using LIDAR, ground measurements and satellite data

Cited by 231 publications

References 41 publications

Spectral optical properties of long-range transport Asian dust and pollution aerosols over Northeast Asia in 2007 and 2008

Spectral optical properties of long-range transport Asian dust and pollution aerosols over Northeast Asia in 2007 and 2008

Spatio-temporal variability of dust aerosols over the Sistan region in Iran based on satellite observations

Carbonaceous and Secondary Inorganic Aerosols during Wintertime Fog and Haze over Urban Sites in the Indo-Gangetic Plain

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