Document Type

Article

Publication Title

Geophysical Research Letters

Rights and Access Note

This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s).

Publication Date

9-1-1996

First Page

1189

Last Page

1192

Issue Number

8

Volume Number

25

Abstract/ Summary

Before ice core chemistry can be used to estimate past atmospheric chemistry it is necessary to establish an unambiguous link between concentrations of chemical species in the air and snow. For the first time a continuous long‐term record of aerosol properties (aerosol light scattering coefficient, σsp , and Ångström exponent, å) at the South Pole are compared with the chemical record from a high resolution firn core (∼10 samples per year) covering the period from 1981 to 1991. Seasonal signals in å, associated with winter minima due to coarse mode seasalt and summer maxima due to accumulation mode sulfate aerosol, are reflected in the firn core SO42−/Na+ concentration ratio. Summertime ratios of σsp and aerosol optical depth, τ to corresponding firn core sulfur concentrations are determined and the ‘calibrations’ are applied to sulfur concentrations in snowpits from a previous study. Results show that σsp estimates from snowpit sulfur concentrations are in agreement with atmospheric measurements while τ estimates are significantly different, which is likely due to the lack of understanding of the processes that mix surface air with air aloft.

Citation/Publisher Attribution

Bergin, M. H., E. A. Meyerson, J. E. Dibb, and P. A. Mayewski (1998), Relationship between continuous aerosol measurements and firn core chemistry over a 10‐year period at the South Pole, Geophysical Research Letters, 25(8), 1189–1192, doi:10.1029/98GL00854. http://www.agu.org/pubs/crossref/1998/98GL00854.shtml

Publisher Statement

© Copyright American Geophysical Union

DOI

10.1029/98GL00854

Version

publisher's version of the published document

Share

 

Rights Statement

In Copyright - Educational Use Permitted.