Sources of anions in aerosols in northeast Greenland during late winter

• DOI: 10.5194/acp-13-1569-2013
• Publication Date: 2013-02-07T10:02:15Z
• Authors: M. Fenger; L. L. Sørensen; K. Kristensen; B. Jensen; Q. T. Nguyen; J. K. Nøjgaard; A. Massling; H. Skov; T. Becker; M. Glasius
• Keywords: Sunrise

Abstract. The knowledge of climate effects atmospheric aerosols is associated with large uncertainty, and a better understanding their physical chemical properties needed, especially in the Arctic environment. objective present study to improve our processes affecting composition high Arctic. Therefore size-segregated were sampled at site, Station Nord (Northeast Greenland), March 2009 using Micro Orifice Uniform Deposit Impactor. aerosol samples extracted order analyse three water-soluble anions: chloride, nitrate sulphate. results are discussed based on possible transformations as well transport patterns. total concentrations ions 53–507 ng m−3, 2–298 m−3 535–1087 for chloride (Cl−), (NO3−) sulphate (SO42−), respectively. late winter/early spring, after polar sunrise, found be mixture long-range transported regional local originating aerosols. Fine particles, smaller than 1 μm, containing SO42−, Cl− NO3−, hypothesized originate from transport, where SO42− by far dominating anion accounting 50–85% analyzed mass. analysis suggests that NO3− coarser particles (> 1.5 μm) local/regional sources. Under conditions air mass over sea ice wind speeds, very coarse 18 observed, it frost flowers source particles.