Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003 - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Atmospheric environment Year : 2005

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

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.

Dates and versions

insu-00374343 , version 1 (08-04-2009)

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Pierre-Alexis Gauchard, Karine Aspmo, Christian Temme, Alexandra Steffen, Christophe P. Ferrari, et al.. Study of the origin of atmospheric mercury depletion events recorded in Ny-Ålesund, Svalbard, spring 2003. Atmospheric environment, 2005, 39 (39), pp.7620 à 7632. ⟨10.1016/j.atmosenv.2005.08.010⟩. ⟨insu-00374343⟩
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