Articles | Volume 18, issue 2
https://doi.org/10.5194/acp-18-1203-2018
https://doi.org/10.5194/acp-18-1203-2018
Research article
 | 
30 Jan 2018
Research article |  | 30 Jan 2018

Transport of regional pollutants through a remote trans-Himalayan valley in Nepal

Shradda Dhungel, Bhogendra Kathayat, Khadak Mahata, and Arnico Panday

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Cited articles

Andreae, M. O. and Crutzen, P. J.: Atmospheric aerosols: biogeochemical sources and role in atmospheric chemistry, Science, 1052–1058, 1997.
Auffhammer, M., Ramanathan, V., and Vincent, J. R.: Integrated model shows that atmospheric brown clouds and greenhouse gases have reduced rice harvests in India, P. Natl. Acad. Sci. USA, 103, 19668–19672, https://doi.org/10.1073/pnas.0609584104, 2006.
Bond, T., Doherty, S., Fahey, D., Forster, P., Berntsen, T., DeAngelo, B., Flanner, M., Ghan, S., Kärcher, B., and Koch, D.: Bounding the role of black carbon in the climate system: a scientific assessment, J. Geophys. Res.-Atmos., 118, 5380–5552, https://doi.org/10.1002/jgrd.50171, 2013.
Brun, J., Shrestha, P., and Barros, A. P.: Mapping aerosol intrusion in Himalayan valleys using the Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO), Atmos. Environ., 45, 6382–6392, 2011.
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Short summary
We analyze seasonal and diurnal concentrations of black carbon (BC), ozone, and associated meteorological conditions within a remote trans-Himalayan valley in western Nepal. We observe elevated BC concentrations during non-monsoon seasons, frequent and persistent episodes of higher-than-average concentrations, and net up-valley fluxes throughout the year. The findings provide direct observational evidence of trans-Himalayan valleys serving as vital pollutant transport pathways.
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