Author(s)

S.R. Schmolke, J. Munthe, I. Wangberg, P. Schager, H.H. Kock, S. Otten, R. Ebinghaus and A. Iverfeldt

Abstract

Estimates of the Air-Sea Exchange of Mercury in the Baltic Sea Derived from Ship Measurements A contribution to subproject MEPOP S.R. Schmolke, J Munthe, I. Wangberg^, P. Schager^, HH Kock\ S. Otten\ R Ebinghaus* and A. Iverfeldt^ *GKSS Research Center, Max-Planck-Str., D-21502 Geesthacht, Germany ^Swedish Environmental Research Institute (IVL), Box 47086, Introduction In the period from July 2nd to 16th, 1997 total gaseous mercury (TGM) and dissolved gaseous mercury (DGM) was measured in the central Baltic Sea during a ship cruise carried out within the framework of the EU MAST III project Baltic Sea System Study (BASYS). Based on this data set, water saturation and water-atmosphere fluxes of mercury were estimated using a simple thin-film gas-exchange model. The DGM concentrations were found to be in the range 15-20 pg L \ The daily average TGM concentration ranges from 1.5 to 2 ng m \ typical for episodes dominated by clean

Keywords