Table of Contents
Atmosphere, Volume 10, Issue 7 (July 2019)
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Cover Story (view full-size image) Atmospheric types of speciated mercury, including gaseous elemental mercury (GEM), gaseous oxidized [...] Read more. Atmospheric types of speciated mercury, including gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particle-bound mercury (PBM2.5), were observed over 10 years at the background site in Okinawa, Japan. Their concentrations increased due to the influence of the Asian outflows more frequently in the cold season. GOM concentrations were also moderately controlled by photochemical production in the summer. An annual decreasing trend for GEM concentrations was observed between 2008 and 2018 at a rate of −2.1% ± 0.36% year−1 that was the same as those in Europe and North America. This is believed to be linked to the influence of the global decreasing GEM trend. However, the decreasing rates during the cold season were restrained by regional Asian outflows. View this paper.