Investigation of mercury depletion events recorded during early and late spring 2003 at Zeppelin/Ny-Ålesund, Svalbard (Norway).

Since February 2000, gaseous elemental mercury (GEM) is continuously monitored at the Zeppelin station, close to Ny-Ålesund. The concentration of GEM remains quite constant throughout the year, around the background value, except for a three month period following the polar sunrise during which it e...

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Bibliographic Details
Main Authors: Girard, Lucas, Berg, Torunn, Hole, Lars Robert
Format: Report
Language:English
Published: NILU 2005
Subjects:
Zeppelinobservatoriet
Kvikksølv
Polare områder
Atmosfære og klima
Norway
Ny-Ålesund
Svalbard
Ny Ålesund
Online Access:https://hdl.handle.net/11250/2761915
Description
Summary:Since February 2000, gaseous elemental mercury (GEM) is continuously monitored at the Zeppelin station, close to Ny-Ålesund. The concentration of GEM remains quite constant throughout the year, around the background value, except for a three month period following the polar sunrise during which it encounters several rapid depletions, dropping down to very low levels, below the detection limit. These events are referred to as atmospheric mercury depletion events (AMDEs) and they are the result of the oxidation of GEM by bromine (BrO) free radicals. While most studies on AMDEs focus on the period with the most serious events (April in Ny-Ålesund), early and late spring 2003 (17/03 to 14/04 and 04/05 to 30/05) were examined in this study.

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