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Article
An Ice-Core Proxy for Antarctic Circumpolar Zonal Wind Intensity
Annals of Glaciology
  • Yuping Yan
  • Paul Andrew Mayewski, University of Maine - Main
  • Shichang Kang
  • Eric Meyerson
Document Type
Conference Proceeding
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Publication Date
1-1-2005
Disciplines
Abstract/ Summary

Using US National Centers for Environmental Prediction/US National Center for Atmospheric Research re-analysis data, we investigate the relationships between crustal ion (nssCa(2+)) concentrations from three West Antarctic ice cores, namely, Siple Dome (SD), ITASE00-1 (IT001) and ITASE01-5 (IT015), and primary components of the climate system, namely, air pressure/geopotential height, zonal (u) and meridional (v) wind strength. Linear correlation analyses between nssCa(2+) concentrations and both air-pressure and wind fields for the period of overlap between records indicate that the SD nssCa(2+) variation is positively correlated with spring circumpolar zonal wind, while IT001 nssCa(2+) has a positive correlation with circumpolar zonal wind throughout the year (r > 0.3, p < 0.01). Intensified Southern Westerlies circulation is conducive to transport of more crustal aerosols to both sites. Further correlation analyses between nssCa(2+) concentrations from SD and IT001 and atmospheric circulation suggest that the high inland plateau (represented by core IT001) is largely influenced by transport from the upper troposphere. IT015 nssCa(2+) is negatively correlated with westerly wind in October and November, suggesting that stronger westerly circulation may weaken the transport of crustal species to IT015. Correlations of nssCa(2+) from the three ice cores with the Antarctic Oscillation index are consistent with results developed from the wind-field investigation. In addition, calibration between nssCa(2+) concentration and the multivariate El Nino-Southern Oscillation (ENSO) index shows that crustal species transport to IT001 is enhanced during strong ENSO events.

Citation/Publisher Attribution
Yan, YP, Mayewski, PA, Kang, SC, and Meyerson, E, 2005, An Ice-Core Proxy for Antarctic Circumpolar Zonal Wind Intensity: Annals of Glaciology, Vol 41, 2005, v. 41, p. 121-130. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/agl/2005/00000041/00000001/art00019
Publisher Statement
© Copyright 2005 by the International Glaciological Society
DOI
10.3189/172756405781813294
Version
publisher's version of the published document
Citation Information
Yuping Yan, Paul Andrew Mayewski, Shichang Kang and Eric Meyerson. "An Ice-Core Proxy for Antarctic Circumpolar Zonal Wind Intensity" Annals of Glaciology Vol. 41 (2005) p. 121 - 130
Available at: http://works.bepress.com/paul_mayewski/20/