Direct radiative forcing properties of atmospheric aerosols over semi-arid region, Anantapur in India

Kalluri, Raja Obul Reddy; Gugamsetty, Balakrishnaiah; Nagireddy, Siva Kumar Reddy; Kotalo, Rama Gopal; Thotli, Lokeswara Reddy; Ramakrishna, Reddy Rajuru; Surendranair, Suresh Babu

doi:10.1016/j.scitotenv.2016.05.056

Cited by 29 publications

(4 citation statements)

References 62 publications

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“…Further, a widespread of active fires are observed by the MODIS in areas of the northeastern regions compared to the other regions during pre-monsoon, indicating the significant influence of biomass burning in the production of CO and its concentration level in the troposphere (Fig.7b &8b). Post-monsoon also the same kind of situation, but a less number of fires spots over the IGB region, and most of the anthropogenic particles are removed by the washout process due to southwest monsoon over the measurement location (Kalluri et al, 2016(Kalluri et al, , 2017. During monsoon winds originate from the Arabian sea and anthropogenic activities were removed by the washout process (Fig.…”

Section: Source Apportionment and Modis Fire Countsmentioning

confidence: 85%

Diurnal, seasonal, and vertical distribution of carbon monoxide levels and their potential sources over a semi-arid region, India

Busa

Gugamsetty

Kalluri

et al. 2022

Atm.

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The present study focuses on the investigation of both near-surface and vertical variability of carbon monoxide (CO) concentrations and their potential sources obtained from both in situ and satellite Measurements of Pollution in the Troposphere (MOPITT) over a semiarid region (Anantapur, India) from January 2016 to December 2017. The diurnal variation of CO shows sharp morning (07:00-09:00 LT) and evening (07:00-09:00 LT) peaks associated to local anthropogenic activities as well as the impact of the mixed layer height, and low concentrations during daytime (12:00-15:00 LT). The low levels during afternoon hours may be due to the increase of the mixed layer height and the decrease of anthropogenic sources. The seasonal mean CO showed no obvious variation, with highest levels observed in winter (329 ± 52 ppbv), followed by the pre-monsoon (327 ± 57 ppbv), post-monsoon (234 ± 36 ppbv) and monsoon (192 ± 22 ppbv). The high levels of CO during the winter are attributed to increased emissions from anthropogenic sources and a shallow mixed layer height. The vertical distribution of CO showed secondary peaks at high-pressure levels (300-200 hPa) during winter, pre-monsoon, and post-monsoon, which indicates CO transport from different source regions. These findings are reasonably confirmed through the air mass Concentrated Weighted Trajectory (CWT) analysis obtained from the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model. This study suggests that except for the monsoon, air masses transported from Indo-Gangetic Basin region also contribute to the enhancement of CO concentrations at the receptor site.

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Section: Source Apportionment and Modis Fire Countsmentioning

confidence: 85%

Diurnal, seasonal, and vertical distribution of carbon monoxide levels and their potential sources over a semi-arid region, India

Busa

Gugamsetty

Kalluri

et al. 2022

Atm.

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“…During DLD, it decrease by 28.95%, a comparably substantial decline in AOD during 2020 phase. Under normal circumstances, residual crop burning and continental dust particles associated with higher wind speed are responsible for high AOD values observed during the month's March-May over the observational location (Kalluri et al, 2016).…”

Section: Shortwave Direct Aerosol Radiative Forcingmentioning

confidence: 95%

“…The possible aerosol sources are present at this site during the summer (March-May) including agriculturar burning activites, fossil fuel burning activities, and transported/windblown dust from north-western winds, (Kalluri et al, 2017;Gopal et al, 2014;. Domestic burning is the main aerosol source in winter (December-February) (Gopal et al, 2017;Lingaswamy et al, 2017;Kalluri et al, 2016).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The Impact of Lockdown on eBC Mass Concentration over a Semi-arid Region in Southern India: Ground Observation and Model Simulations

Palle

Kalluri

Gugamsetty

et al. 2021

Aerosol Air Qual. Res.

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In the present study, we focused on the impact of lockdown on black carbon (eBC) mass concentrations and their associated radiative implications from 01 st March to 30 th June 2020, over a semi-arid station, i.e., in the district of Anantapur in Southern India. The mean eBC mass concentration was observed before lockdown (01 st -24 th March 2020) and during the lockdown (25 th March to 30 th June 2020) period and was about 1.74±0.36 and 1.11±0.14 µg m -3 , respectively. The sharp decrease (~35%) of eBC mass concentration observed during the lockdown (LD) period as compared with before lockdown (BLD) period, was mainly due to the reduction of anthropogenic activities and meteorology. Furthermore, during the entire LD period, the net composite forcing at the top of the atmosphere (TOA) and at the surface (SUR) varied from -4.52 to -6.19 Wm -2 and -22.91 to -29.35 Wm -2 , respectively, whereas the net forcing in the atmosphere (ATM) varied from 17.27 to 23.16 Wm -2 . Interestingly, the amount of energy trapped in the atmosphere due to eBC is 11.19 Wm -2 before LD and 8.56 Wm -2 during LD. It is concluded that eBC contributes almost 43 -50% to the composite forcing. As a result, the eBC atmospheric heating rate decreased significantly (25%) when compared to before lockdown days to lockdown days.

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“…Atmospheric aerosols are an inevitable issue in Atmospheric Physics and Chemistry (Kalluri, 2016). They are suspensions, in air, of solid or liquid particles, which are mostly observed as dust, smoke and haze.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Aerosols in West Africa: Modelling and Radiative Forcing

S.B.,

R.,

B.B.

et al. 2023

Env.cont.Reviews

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We studied the aerosol properties in Cinzana and Ilorin in West Africa using data of aerosols’ properties over the period 2000–2015 from MODIS (Moderate resolution Imaging Spectroradiometer). There has been limited report on the comparison between this two West African Stations. The time series modelling, prediction of aerosol parameters and the estimation of aerosol radiative forcing (ARF) were focused on. Statistical Package for the Social Sciences (SPSS) software was used for the modelling the monthly averaged measurements of aerosol optical depth at 550 nm (τ550), Angstrom exponent at 470 – 660 nm (α470-660), cloud fraction (Ncloud), fine mode fraction (FMF) and single scattering albedo at 470 nm (ωo) data over the two stations while the ARF values were calculated. The generated time series models are all good fit and the values are biased, both negatively and positively. The ARF of the two stations’ aerosol data shows value between 0.0 and -750.0 W/m2 for Ilorin and -10.0 to -200. 0 W/m2, which results mainly in cooling. Although there is a difference between ARF values in the two stations, both stations demonstrated clear seasonal variation with the rainy season having the least negative aerosol forcing. The results suggest that the aerosols are predominantly mineral dust, but those in Cinzana have more absorbing properties than those in Ilorin. Overall, the research shows that the modelled parameters can be utilized in lieu of the measured data and that the solar radiation received in this region has been attenuated at various degrees

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Direct radiative forcing properties of atmospheric aerosols over semi-arid region, Anantapur in India

Cited by 29 publications

References 62 publications

Diurnal, seasonal, and vertical distribution of carbon monoxide levels and their potential sources over a semi-arid region, India

Diurnal, seasonal, and vertical distribution of carbon monoxide levels and their potential sources over a semi-arid region, India

The Impact of Lockdown on eBC Mass Concentration over a Semi-arid Region in Southern India: Ground Observation and Model Simulations

Analysis of Aerosols in West Africa: Modelling and Radiative Forcing

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