Updated trends for atmospheric mercury in the Arctic: 1995-2018.

The Arctic region forms a unique environment with specific physical, chemical, and biological processes affecting mercury (Hg) cycles and limited anthropogenic Hg sources. However, historic global emissions and long range atmospheric transport has led to elevated Hg in Arctic wildlife and waterways. Continuous atmospheric Hg measurements, spanning 20 years, and increased monitoring sites has allowed a more comprehensive understanding of how Arctic atmospheric mercury is changing over time.

Using elemental analyses and multivariate statistics to identify the off-site dispersion from informal e-waste processing.

Electronic waste (e-waste) is informally processed and recycled in Agbogbloshie in Accra (Ghana), which may be the largest such site in West Africa. This industry can lead to significant environmental contamination. In this study, surface dust samples were collected at a range of sites within Accra to establish the offsite consequences of such activities.

The superstatistical nature and interoccurrence time of atmospheric mercury concentration fluctuations.

The probability density function (PDF) of the time intervals between subsequent extreme events in atmospheric Hg concentration data series from different latitudes has been investigated. The Hg dynamic possesses a long-term memory autocorrelation function. Above a fixed threshold in the data, the PDFs of the interoccurrence time of the Hg data are well described by a Tsallis q-Exponential function.