Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003

Pierre-Alexis Gauchard; Karine Aspmo; Christian Temme; Alexandra Steffen; Christophe P. Ferrari; Torunn Berg; Johan Ström; Lars Kaleschke; Aurélien Dommergue; Enno Bahlmann; Olivier Magand; Frédéric Planchon; Ralf Ebinghaus; Cathy Banic; Sonia Nagorski; Patrick Baussand; Claude F. Boutron

doi:10.1016/j.atmosenv.2005.08.010

Journal articles

Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003

Pierre-Alexis Gauchard ¹ Karine Aspmo ^{2, 3} Christian Temme ⁴ Alexandra Steffen ⁵ Christophe P. Ferrari ^{1, 6} Torunn Berg ² Johan Ström ⁷ Lars Kaleschke ⁸ Aurélien Dommergue ^{1, 4} Enno Bahlmann ⁴ Olivier Magand ¹ Frédéric Planchon ^{1, 9} Ralf Ebinghaus ⁴ Cathy Banic ⁵ Sonia Nagorski ¹ Patrick Baussand ¹⁰ Claude F. Boutron ^{1, 11}

1 LGGE - Laboratoire de glaciologie et géophysique de l'environnement

2 NILU - Norwegian Institute for Air Research

3 Department of Chemistry [Oslo]

4 GKSS-Research Center

5 Air Quality Research Branch, Meteorological Service of Canada

6 Polytech' Grenoble

7 ITM - Institute of Applied Environmental Research [Stockholm]

8 IUP - Institute of Environmental Physics [Bremen]

9 Environmental Sciences Department

10 GRECA - Groupe de Recherche sur l'Environnement et la Chimie Atmosphérique

11 UFR de Mécanique et de Physique

Abstract : An international campaign involving six teams was organized in Ny-Ålesund, Svalbard, in order to understand better the origin of atmospheric mercury depletion events (AMDEs). Special emphasis was given to determining the source region of the observed events and the physical and chemical processes leading to AMDEs. Five AMDEs were recorded during a one-month field experiment (10 April-10 May, 2003). The different events presented various characteristics, especially in terms of mercury species formation, atmospheric particle variations and meteorological conditions. After careful examination of each event, we postulate that two were probably due to advection of already depleted air masses and three were a product of local or regional chemistry. The roles of different surfaces (frost flowers, snow, ice aerosol in clouds) involved in heterogeneous reactions leading to AMDEs are also discussed. We speculate that ice clouds may explain the particle variations observed during the three more local events.

Keywords : Atmospheric mercury depletion events Mercury Ozone Particles Transport

Document type :

Journal articles

Domain :

Sciences of the Universe [physics] / Ocean, Atmosphere

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Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003

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Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003

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