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Spatial variations of surface snow chemistry during two austral summers in western Dronning Maud Land, Antarctica
AbstractThe glaciochemical properties of snow were measured in western Dronning Maud Land during the austral summers of 1999/2000 and 2000/2001. The surface snow samples were taken along a 350-km transect from the seaward edge of the ice shelf to the Antarctic plateau and analysed for the presence of the major inorganic components SO42−, NO3−, Cl−, NH4+, Na+, K+, Ca2+, Mg2+ and MSA. The sea-salt components and MSA decreased exponentially with increasing distance from the coast by about 64%/100km. Non-sea-salt SO42− decreased also exponentially with the distance from the ice edge by 48%/100km. No substantial trend was observed for NO3−. The pH values calculated from the ionic balance were similar to those measured in the field, although the calculated pH values were an average of 0.6 lower. The fractions of the dry deposition of the ionic concentrations were estimated and the results reveal that they are low near the Finnish research station Aboa, usually less than 10% of the total deposition.
Spatial variations of surface snow chemistry during two austral summers in western Dronning Maud Land, Antarctica
AbstractThe glaciochemical properties of snow were measured in western Dronning Maud Land during the austral summers of 1999/2000 and 2000/2001. The surface snow samples were taken along a 350-km transect from the seaward edge of the ice shelf to the Antarctic plateau and analysed for the presence of the major inorganic components SO42−, NO3−, Cl−, NH4+, Na+, K+, Ca2+, Mg2+ and MSA. The sea-salt components and MSA decreased exponentially with increasing distance from the coast by about 64%/100km. Non-sea-salt SO42− decreased also exponentially with the distance from the ice edge by 48%/100km. No substantial trend was observed for NO3−. The pH values calculated from the ionic balance were similar to those measured in the field, although the calculated pH values were an average of 0.6 lower. The fractions of the dry deposition of the ionic concentrations were estimated and the results reveal that they are low near the Finnish research station Aboa, usually less than 10% of the total deposition.
Spatial variations of surface snow chemistry during two austral summers in western Dronning Maud Land, Antarctica
Kärkäs, Eija (author) / Teinilä, Kimmo (author) / Virkkula, Aki (author) / Aurela, Minna (author)
Atmospheric Environment ; 39 ; 1405-1416
2004-11-17
12 pages
Article (Journal)
Electronic Resource
English