Japan Geoscience Union Meeting 2016

Presentation information


Symbol A (Atmospheric and Hydrospheric Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC21] Ice cores and past environmental changes

Wed. May 25, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Nozomu Takeuchi(Chiba University), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo), Ikumi Oyabu(National Institute of Polar Research, Research Organization of Information and Systems)

5:15 PM - 6:30 PM

[ACC21-P03] Chemical solutes and mineral particles in a shallow ice core from Tienshan Urumqi No.1 Glacier

*Kenshiro Miyauchi1, Nozomu Takeuchi1, Kozue Wakabayashi1, Yoriko Ishida1, Zhongqin Li2 (1.Chiba University, 2.Tienshan Glaciological Station)

Keywords:Ice core, dust, Central Asia

Ice cores drilled from glaciers in central Asia usually contain a number of dust layers because dust storms frequently occur and supply dust on such mountain glaciers. Dust layers are usually used to distinguish annual layers, however, chemical and mineralogical characteristics of each dust layer have not been studied well. In this study, we analyzed an 8 m-deep ice core drilled from Tienshan Urumqi Glacier No.1 in 2006 in order to characterize dust layers chemically and mineralogically. Microscopy revealed 10 dust layers in the core. The concentration of dust particles did not agreed with those of Ca or Mg, which are derived from dust particles. Furthermore, Ca/Mg ratio varied among the dust layers, suggesting that the mineralogical composition of dust layers differed from year to year.