Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

FP5

THALOZ Berichtzusammenfassung

Project ID: EVK2-CT-2001-00104
Gefördert unter: FP5-EESD
Land: Germany

Atmospheric measurements: antarctic springtime depletion of atmospheric mercury

Mercury in ambient air exists in the elemental form and it is distributed on a global scale. However, Canadian researchers have recently found that total gaseous mercury is significantly depleted in the Canadian Arctic during the months after polar sunrise. This study provided the first high-resolution mercury data for the Antarctic. It was found that mercury depletion events also occur in the Antarctic after polar sunrise.

One explanation for mercury depletion may be the oxidation of elemental mercury, followed by adsorption and deposition of the oxidised form. This study found indications that BrO radicals and ozone play a key role in the boundary layer chemistry of springtime mercury depletion events in the Antarctic.

This work has been widely disseminated through publication in an international journal. It shows an important feature of the global cycle of mercury: an increased input of atmospheric mercury to polar ecosystems is expected during the short springtime period, which coincides with the period of highest biological activity. This has environmental and public health implications.


Ebinghaus R., H. H. Kock, C. Temme, J. W. Einax, A. G. Lowe, A. Richter, J.P. Burrows, and W. H. Schroeder, Antarctic Springtime Depletion of Atmospheric Mercury, Environ. Sci. Technol., 36(6), 1238-1244, 2002.

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Reported by

Institute of Environmental Physics and Remote Sensing IUP/IFE, UNIVERSITAET BREMEN
Postfach 330440
28334 BREMEN
Germany
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