OMI satellite observations of decadal changes in ground-level sulfur dioxide over North America

作者：Kharol Shailesh K; McLinden Chris A; Sioris Christopher E; Shephard Mark W; Fioletov Vitali; van Donkelaar Aaron; Philip Sajeev; Martin Randall V

来源：Atmospheric Chemistry and Physics, 2017, 17(9): 5921-5929.

DOI：10.5194/acp-17-5921-2017

Sulfur dioxide (SO2) has a significant impact on the environment and human health. We estimated ground-level sulfur dioxide (SO2) concentrations from the Ozone Monitoring Instrument (OMI) using SO2 profiles from the Global Environmental Multi-scale - Modelling Air quality and CHemistry (GEM-MACH) model over North America for the period of 2005-2015. OMI-derived ground-level SO2 concentrations (r = 0.61) and trends (r = 0.74) correlated well with coincident in situ measurements from air quality networks over North America. We found a strong decreasing trend in coincidently sampled ground-level SO2 from OMI (-81 +/- 19 %) and in situ measurements (-86 +/- 13 %) over the eastern US for the period of 2005-2015, which reflects the implementation of stricter pollution control laws, including flue-gas desulfurization (FGD) devices in power plants. The spatially and temporally contiguous OMI-derived ground-level SO2 concentrations can be used to assess the impact of long-term exposure to SO2 on the health of humans and the environment.

• 出版日期2017-5-15