Articles | Volume 20, issue 22
Atmos. Chem. Phys., 20, 14457–14471, 2020
https://doi.org/10.5194/acp-20-14457-2020
Atmos. Chem. Phys., 20, 14457–14471, 2020
https://doi.org/10.5194/acp-20-14457-2020

Research article 28 Nov 2020

Research article | 28 Nov 2020

Amplification of South Asian haze by water vapour–aerosol interactions

Vijayakumar Sivadasan Nair et al.

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Revised manuscript accepted for ACP
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Cited articles

Ajay, P., Pathak, B., Solmon, F., Bhuyan, P. K., and Giorgi, F.: Obtaining best parameterization scheme of RegCM 4.4 for aerosols and chemistry simulations over the CORDEX South Asia, Clim. Dyn., 53, 329–352, https://doi.org/10.1007/s00382-018-4587-3, 2019. 
Ali, K., Acharja, P., Trivedi, D. K., Kulkarni, R., Pithani, P., Safai, P. D., Chate, D. M., Ghude, S., Jenamani, R. K., and Rajeevan, M.: Characterization and source identification of PM 2.5 and its chemical and carbonaceous constituents during Winter Fog Experiment 2015–16 at Indira Gandhi International Airport, Delhi, Sci. Total Environ., 662, 687–696, https://doi.org/10.1016/j.scitotenv.2019.01.285, 2019. 
Aswini, A. R., Hegde, P., Nair, P. R., and Aryasree, S.: Seasonal changes in carbonaceous aerosols over a tropical coastal location in response to meteorological processes, Sci. Total Environ., 656, 1261–1279, https://doi.org/10.1016/j.scitotenv.2018.11.366, 2019. 
Babu, S. S., Manoj, M. R., Moorthy, K. K., Gogoi, M. M., Nair, V. S., Kompalli, S. K., Satheesh, S. K., Niranjan, K., Ramagopal, K., Bhuyan, P. K. and, Singh, D.: Trends in aerosol optical depth over Indian region: Potential causes and impact indicators, J. Geophys. Res.-Atmos., 118, 11794–11806, https://doi.org/10.1002/2013JD020507, 2013. 
Babu, S. S., Nair, V. S., Gogoi, M. M., and Moorthy, K. K.: Seasonal variation of vertical distribution of aerosol single scattering albedo over Indian sub-continent: RAWEX aircraft observations, Atmos. Environ., 125, 312–323, https://doi.org/10.1016/j.atmosenv.2015.09.041, 2016. 
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Short summary
Air pollution and wintertime fog over South Asia is a major concern due to its significant implications on air quality, visibility and health. Coupled model simulations show that hygroscopic growth of aerosols contributes significantly to the aerosol-induced cooling at the surface. Our analysis demonstrates that the aerosol–moisture interaction is the most significant contributor favouring and strengthening the high-aerosol conditions (poor air quality) prevailing over South Asia during winter.
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