Document Type

Article

Publication Title

Annals of Glaciology

Publisher

International Glaciology Society

Publication Date

1998

First Page

371

Last Page

377

Volume Number

27

Abstract/ Summary

High-resolution (>10 samples a -1) glaciochemical analyses covering the last 110 years from a Siple Dome, Antarctica, ice core reveal limited migration of certain soluble ionic species (methane sulfonic acid, NO3 and Mg2+). Th e observed chemical migration m ay be due in part to seasonal alternation between less acidic winter (from high sea-salt concentrations) and m ore acidic summer (from high marine biogenic acid concentrations) layers, common at coastal sites such as Siple Dome. Exact mechanisms to explain the migration are unclear, although simple diffusion and gravitational movement are unlikely since new peaks are formed where none previously existed in each case. Initial migration of each species is both sh allower and earlier at Siple Dome th an at other sites in Antarctica where similar phenomena have been observed, which m ay be related to the relatively low accumulation rate at Siple Dome (∼13.3 cm ice a-1). Migration appears to be limited to either the preceding or following seasonal layer for each species, suggesting that paleoclimatic interpretations based on data with lower than annual resolution are not likely to be affected.

Citation/Publisher Attribution

Kreutz, K.J., Mayewski, P.A., Witlow, S.I. & Twickler, M.S., (1998). Limited migration of soluble ionic species in a Siple Dome, Antarctica ice core, Annals of Glaciology 27, 371-377.

Publisher Statement

© Copyright 1998 by International Glaciology Society

Version

publisher's version of the published document