Arctic springtime depletion of mercury

Article Abstract:

The ecosystem in the Arctic is increasingly being contaminated by toxic substances, such as mercury, that accumulate in organisms. Surface-level measurements of gaseous mercury in the air in the Northwest Territories, Canada, have been taken and frequent episodic depletions in mercury vapour concentrations were observed during the spring, resembling depletion of ozone in Arctic surface air. It is concluded that this conversion of mercury vapour leads to the production of mercury species with shorter atmospheric residence times.

Research, Arctic, Biotic communities, Mercury, Mercury (Metal)

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Intercepting the first rat ashore

Article Abstract:

There are tremendous difficulties in keeping islands free from rats with isolated invaders, as they evade conventional trappings that are normally used in high-density population areas. Studies confirm that eliminating a single invading rat is disproportionately difficult due to atypical behavior in the absence of conspecifics, while the bait could also be less effective in the absence of competition for natural food resources.

United States, Rats, Rat control, Rattus

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A strong source of methyl chloride to the atmosphere from tropical coastal land

Article Abstract:

There is evidence of significant methyl chloride emission from warm coastal land, especially from tropical islands. This is based on global monitoring and spot measurements, showing a close link between methyl chloride concentrations and those of biogenic compounds from terrestrial plants. Distribution of methyl chloride is uniform between the Norther and Southern hemispheres.

Measurement, Chloromethane, Methyl chloride

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