Trends in atmospheric mercury concentrations at the summit of the Wank mountain, Southern Germany
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Characterization of atmospheric total gaseous mercury at a remote high-elevation site (Col Margherita Observatory, 2543 m a.s.l.) in the Italian Alps
2022, Atmospheric EnvironmentCitation Excerpt :From March 2018 to May 2019 the mean concentration of TGM was 3.14 ± 1.29 ng m−3 (mean ± standard deviation (SD)), which is 1.8 times higher than the previous long-term averaged value (1.73 ± 0.34 ng m−3) calculated from measurements performed between December 2013 to July 2015 (Table ESM1) (ESM, Electronic Supplementary Material). This value, regardless of the year reported, is the highest amongst all the TGM values measured in other mountainous, continental and coastal sites at remote and rural locations in Europe (Denzler et al., 2017; Kentisbeer et al., 2015; Kock et al., 2005; Lee et al., 1998; Slemr and Scheel, 1998; Wängberg et al., 2016), with a few exceptions related to high TGM levels up to 8.2 ng m−3 that were observed during short field campaigns (Halle/Leipzig/Bitterfeld and Langenbrügge) at low altitudes in North-western and Central Europe (Ebinghaus et al., 1995). In addition, only a few measurements carried out at elevated remote and rural sites in China showed higher TGM concentrations than those at MRG (Fu et al., 2008, 2009; Chen et al., 2013, 2016; Yu et al., 2015; Wan et al., 2009).
Mercury as a proxy for volcanic emissions in the geologic record
2019, Earth-Science ReviewsLong-term monitoring of trace metals in PM10 and total gaseous mercury in the atmosphere of Porto, Portugal
2017, Atmospheric Pollution ResearchCitation Excerpt :The test result indicated a statistically significant difference between the medians of concentrations values between winter and summer seasons. The seasonality of TGM concentrations was first presented by Slemr and Scheel (1998). As already explained in other studies the seasonal variation of TGM concentrations may be partially explained by meteorological conditions and caused by changes in the natural patterns of atmosphere circulation, mixing-layer height, precipitation and wet and dry deposition variations over the year (Kock et al., 2005; Slemr and Scheel, 1998; Temme et al., 2007).
Analysis and interpretation of 18 years of mercury observations since 1996 at Mace Head, Ireland
2015, Atmospheric EnvironmentMercury deposition through the Permo-Triassic Biotic Crisis
2013, Chemical GeologyCitation Excerpt :In the Early Triassic, global atmospheric Hg would have been maintained predominantly by volcanic activity (the largest source of natural Hg to the environment) (Paton et al., 2010). Anomalous volcanic events have Hg release that greatly exceeds normal background emissions (Slemr et al., 1995; Slemr and Scheel, 1998; Pyle and Mather, 2003; Sanei et al., 2012). Likewise, Schuster et al. (2002) show that major volcanic eruptions produce global mercury anomalies (e.g. Krakatau and Tambora eruptions recorded as Hg spikes in the Fremont Glacier in Wyoming).
The effect of man made source processes on the behavior of total gaseous mercury in air: A comparison between four urban monitoring sites in Seoul Korea
2011, Science of the Total EnvironmentCitation Excerpt :The reasons for the observed differences, especially the summer dominance, were assessed by a number of researchers. First, Slemr and Scheel (1998) explained different types of seasonal variation as an interactive relationship between predominant source (ambient temperature) and predominant sink modulation (including oxidant concentration). Likewise, the enhanced Hg levels during summer were suggested to arise from strong emissions from surfaces due to increasing temperature and solar radiation in summer (Denis et al., 2006).