Strong radiative heating due to wintertime black carbon aerosols in the Brahmaputra River Valley

Chakrabarty, Rajan K.; Garro, Mark A.; Wilcox, E. M.; Moosmüller, Hans

doi:10.1029/2012gl051148

Cited by 42 publications

(20 citation statements)

References 34 publications

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“…In India, several studies are reported over the IndoGangetic Plains (Tripathi et al, 2005;Nair et al, 2007;Dumka et al, 2010;Ramachandran and Kedia, 2010;Praveen et al, 2012;Srivastava et al, 2012;Tiwari et al 2013a;Srivastava and Ramchandran, 2013;Kanawade et al, 2014;etc. ) as well as the eastern part of India (Das, 2010;Pathak et al, 2010;Chatterjee et al, 2012;Chakrabarty et al, 2012;Sarkar et al, 2014;etc.). In the present study, continuous measurement of BC mass concentrations was made for the first time over the coal field area in Dhanbad, India.…”

Section: Introductionmentioning

confidence: 99%

Intra-seasonal variability of black carbon aerosols over a coal field area at Dhanbad, India

Singh

Tiwari

Gond

et al. 2015

Atmospheric Research

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Section: Introductionmentioning

confidence: 99%

Intra-seasonal variability of black carbon aerosols over a coal field area at Dhanbad, India

Singh

Tiwari

Gond

et al. 2015

Atmospheric Research

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“…The study by Zhang et al proved that haze pollutants comprise particles both from local emission sources and from long distance transport [23]. Owing to weather patterns, particles can be transferred on the continental scale, which greatly affects the air quality of locations in downwind directions [24,25]. Furthermore, Li et al and Duan et al studied the phase and mixture status of aerosols and discovered that hazes in the North China Plain (NCP) during June are caused primarily by particles generated from the combustion of agricultural biomass [26,27].…”

Section: Introductionmentioning

confidence: 99%

Aerosol Optical Properties of a Haze Episode in Wuhan Based on Ground-Based and Satellite Observations

Zhang

Gong

et al. 2014

Atmosphere

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A severe haze episode that occurred in Wuhan, central China, from 6-14 June 2012 was investigated using ground-based and satellite-derived observations, from which the optical properties and vertical distribution of the aerosols were obtained. The mass concentrations of PM 2.5 and black carbon (BC) were 9.9 (332.79 versus 33.66 μg·m ). Particle size became larger, consistent with the reduced scattering Ångström exponent. The high asymmetry parameter (0.65) and single scattering albedo (SSA) (0.97) observed in the haze, which coincided with the relatively low backscatter ratio (0.11) and up-scatter fraction (0.23), were related to the increased particle size, and could have had a heating effect on the atmosphere. Aerosols accumulated primarily below 3 km and according to CALIPSO, were regular in their shapes. At the surface, the aerosol extinction coefficient detected by satellite remained at ~1 km , very close to the ground-based observations. Aerosol optical properties measured at this downtown site could help further the understanding of the effects of aerosols on the air quality, city environment, and radiation balance. OPEN ACCESSAtmosphere 2014, 5 700

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“…Hence it may be concluded that this enhanced BC absorption inside the cloud is giving way to a reduction of albedo at TOA and enhancing the atmospheric absorption. Chakrabarty et al () reported a direct forcing of −63.4 W m −2 by BC at the surface and +11.2 W m −2 at TOA over GHT for clear‐sky days (in the winter season for a similar BC mass concentration). Hence our study suggests that in cloudy conditions, the BCIF at the surface may contribute around half the magnitude of direct forcing; however, its contribution may be equal to or greater than BC direct forcing at TOA.…”

Section: Resultsmentioning

confidence: 99%

Indirect forcing of black carbon on clouds over northeast India

Panicker

Pandithurai

Safai

et al. 2016

Quart J Royal Meteoro Soc

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Black carbon (BC) induced indirect radiative forcing and cloud albedo effect has been studied for the first time over northeast India. Measurements of BC and cloud microphysical parameters were carried out during Phase‐I of the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) over northeast India (Guwahati) in 2009. Liquid water path (LWP) in the cloud layers coherent with BC on different experimental days was found to be 206–327 g m−2 over the region. Black carbon aerosol indirect effect (BCIE) for fixed LWP is found to be 0.32–0.48 on different days of observations. The indirect forcing corresponding to this BCIE has been estimated using a radiative transfer model for fixed LWP by altering the derived BC‐AOD (aerosol optical depth from measured BC profiles) and cloud effective radius (Re) combinations. The estimated average BC‐induced indirect forcing (BCIF) was −24 to −37.1 W m−2 at the surface and +2.5 to +14.8 W m−2 at the top of the atmosphere (TOA). The average albedo due to BCIF at TOA was 0.49–0.61. BCIF is found to reduce the cloud reflection by 1.5–2% over the region. The sensitivities of cloud parameters to BCIF and the albedo effect are illustrated.

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Strong radiative heating due to wintertime black carbon aerosols in the Brahmaputra River Valley

Cited by 42 publications

References 34 publications

Intra-seasonal variability of black carbon aerosols over a coal field area at Dhanbad, India

Intra-seasonal variability of black carbon aerosols over a coal field area at Dhanbad, India

Aerosol Optical Properties of a Haze Episode in Wuhan Based on Ground-Based and Satellite Observations

Indirect forcing of black carbon on clouds over northeast India

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