Air-to-snow mineral transfer - crustal elements in aerosols, fresh snow and snowpits on the Greenland ice sheet

J. L. Colin, B. Lim, E. Herms, F. Genet, E. Drab, J. L. Jaffrezo, C. I. Davidson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Air-to-snow mineral transfer of crustal species on the Greenland Ice Sheet was studied at Dye 3 during a full annual cycle (August 1988-August 1989) and at Summit during a summer campaign (May 1991-September 1991). At Dye 3, continuously sampled aerosols (54 filters) show a clear seasonal cycle of insoluble mineral elements (Al, Fe, Ca) with strong concentration peaks in April. The simultaneous collection of fresh snows (32 precipitation events) reveals the same seasonal picture. Furthermore, a comparison of metal concentrations in both aerosol and snow indicates that the transfer of crustal elements (Fe or Al) from air to snow seems to occur without fractionation. This one year seasonal cycle is recovered in snowpits excavated at Dye 3 (1 yr) and at Summit (3 yr) exhibiting no major post-depositional changes of crustal elements in aging snow. This suggests that the insoluble fraction of crustal elements, such as Fe or Al, in Arctic snows accurately reflects the seasonal atmospheric signal of mineral aerosols.

Original languageEnglish (US)
Pages (from-to)3395-3406
Number of pages12
JournalAtmospheric Environment
Volume31
Issue number20
DOIs
StatePublished - Oct 1 1997
Externally publishedYes

Keywords

  • Greenland
  • Insoluble fraction of Arctic snow
  • Mineral arctic aerosol

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

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