Investigators are currently measuring elemental gaseous mercury resulting from long range transport, and reactive gas mercury which is produced locally. Models have been developed for both elemental gaseous mercury surface concentrations and the reactive gaseous mercury species concentrations found to be functions of UVB input and mixing turbulence. Reactive gaseous mercury concentrations measured in springtime are the highest concentrations ever measured anywhere on the globe. Nighttime concentrations approach zero; daytime concentrations may be as high as 900 pg/m3. A manuscript is being submitted to Science.
Oak Ridge National Laboratory
NOAA Cooperative Institute for Arctic Research EPA Office of International Affairs