Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/tcd-8-769-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
27 Jan 2014
Review status
This discussion paper is a preprint. A revision of the manuscript for further review has not been submitted.
Dating of a Dome Fuji (Antarctica) shallow ice core by volcanic signal synchronization with B32 and EDML1 chronologies
Y. Motizuki1, Y. Nakai1, K. Takahashi1, M. Igarashi2,*, H. Motoyama2, and K. Suzuki3 1RIKEN Nishina Center, Hirosawa 2-1, Wako, Japan
2National Institute of Polar Research, Research Organization of Information and Systems, Midoricho 10-3, Tachikawa, Tokyo, Japan
3Department of Environmental Sciences, Shinshu University, Asahi 3-1-1, Matsumoto, Japan
*now at: Maruzen Co. Ltd., Tokyo, Japan
Abstract. We found extremely good synchronization of volcanic eruption signals between a shallow ice core drilled at Dome Fuji in 2001 (DF01 core) and the B32 shallow ice core from Dronning Maud Land, East Antarctica. We then applied volcanic signature matching to transfer the B32 chronology constructed by annual layer counting to a portion of the DF01 core for which annual layer counting was difficult because of the low precipitation rate. Matching was done by careful comparison of non-sea-salt sulfate (nssSO42−) data, which have a temporal resolution of about 1 yr, between the DF01 and B32 cores. The newly obtained chronology is called DFS1 (Dome Fuji Shallow ice core 1). In total, 31 volcanic eruptions were synchronized from AD 1900 back to AD 187, the earliest volcanic eruption date in the B32 core. The mean accumulation rate between synchronized volcanic horizons of the Dome Fuji core relative to rates at the B32 core drilling site did not differ significantly between these dates, increasing our confidence in this matching approach. We also used the B32-correlated EDML1/EDC3 chronology obtained from the top part of the EPICA Dronning Maud Land (DML) deep ice core to date a portion of the DF01 core. This new chronology, called DFS2 (Dome Fuji Shallow ice core 2), uses the correlations between B32 and EDML1/EDC3 ages to date the DF01 core from AD 1900 back to AD 199; moreover, four volcanic eruption dates from the EDML1/EDC3 chronology were used to date the interval from AD 199 back to AD 1. Because the EDML1/EDC3 ages were determined by adopting the B32 chronology back to AD 1170, DFS1 and DFS2 dates are identical between AD 1170 and 1900. These two methods enabled us to obtain a detailed chronology of the DF01 core, in particular the part before the last millennium, which has been difficult before this. We also present the absolute mean accumulation rates at Dome Fuji between AD 1 and 1900, based on the DFS1 and DFS2 chronologies.

Citation: Motizuki, Y., Nakai, Y., Takahashi, K., Igarashi, M., Motoyama, H., and Suzuki, K.: Dating of a Dome Fuji (Antarctica) shallow ice core by volcanic signal synchronization with B32 and EDML1 chronologies, The Cryosphere Discuss., https://doi.org/10.5194/tcd-8-769-2014, in review, 2014.
Y. Motizuki et al.

Viewed

Total article views: 1,209 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
774 329 106 1,209 57 74

Views and downloads (calculated since 27 Jan 2014)

Cumulative views and downloads (calculated since 27 Jan 2014)

Saved

Discussed

Latest update: 18 Oct 2017
Publications Copernicus
Download
Share