Atmospheric carbonaceous aerosols were sampled discontinuously from July 2006 to December 2009 at Nam Co Comprehensive Observation and Research Station (NCOS) in the central Tibetan Plateau (TP). The mean daily concentration of carbonaceous aerosols increased from 268 to 330 ng m−3, and pollution episodes could significantly increase the mean level of carbonaceous aerosols in the total mass concentration. Organic carbon was the main component of carbonaceous aerosols at NCOS, and black carbon (BC) accounted for 5.8 %. Seven-day air masses backward trajectories calculated by the Hybrid Single-Particle Lagrangian Integrated Trajectory model and the aerosol optical depth distribution in the TP and South Asia both suggested that atmospheric pollutants emitted from Northern India and South Asia could penetrate into central TP by southwest winds. Due to the seasonal variations of emission sources and regional atmospheric conditions, calculated BC deposition flux in the nonmonsoon season was higher than that in the monsoon season. Increased BC concentration in snowpack in winter from 2007 to 2009 indicated that the atmospheric environment in central TP became more polluted and the influences from human activities have strengthened. Pollution episodes could significantly increase BC concentrations in the snowpack on a seasonal scale, which would furthermore affect the surface albedo.
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This work was supported by the Global Change Research Program of China (2010CB951401), National Natural Science Foundation of China (Grants 41121001 and 40901046), State Key Laboratory of Cryospheric Sciences (SKLCS-ZZ-2012-01-06), China Special Fund for Meteorological Research in the Public Interest (GYHY201106023), Basic Research Fund of CAMS (2011Z003, 2010Z002), and the Climate Change Science Foundation of CMA (2013–2014 and no. 1411342000001). We would like to thank the anonymous reviewers for the helpful comments. Logistic help was from the staff at the NCOS.
Responsible editor: Gerhard Lammel
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Zhao, S., Ming, J., Sun, J. et al. Observation of carbonaceous aerosols during 2006–2009 in Nyainqêntanglha Mountains and the implications for glaciers. Environ Sci Pollut Res 20, 5827–5838 (2013). https://doi.org/10.1007/s11356-013-1548-6
- Black carbon
- Organic carbon
- Tibetan Plateau (TP)