Data Publications

Dome Fuji, Antarctica 1993 Shallow Core 1 cm Electrical Conductivity Measurements (ECM)

  • Japanese Antarctic Research Expedition
  • 2015
  • Dome Fuji, Antarctica 1993 Shallow Core 1 cm Electrical Conductivity Measurements (ECM)
  • A20180613-010
  • ice core
  • Dome Fuji
  • ECM
  • Electrical Conductivity
  • Fujita, S., Azuma, N., Motoyama, H., Kameda, T., Narita, H., Fujii, Y., & Watanabe, O. (2002). Electrical measurements on the 2503 m Dome F Antarctic ice core. Annals of Glaciology, 35, 313-320. doi:10.3189/172756402781816951
  • The climatic record from the 2503m Dome Fuji (Antarctica) ice core was analyzed using ECM (electrical conductivity measurements). The ECM current respond to acid. Dome Fuji ice was measured to be highly acidic, with background values of 2-7 micro M, and had 4500 major peaks with acidities of up to 90 micro M. Method is as follows. After equilibrating for 1 day at the cold-room temperature at Dome F, all core sections, which were 93mm in diameter and about 1.7m long, were cut parallel to their central axes into 60% and 40% portions by volume. The cut surfaces of the 60% portions were further finished with a microtome knife to make fresh, smooth surfaces. Immediately after a surface was cut and finished, two ECM electrodes were dragged along the surface with a 1250V d.c. potential difference. The entire ice core from depths of 112.65 to 2503.07m was covered by the measurements. Although the signal was sampled every 2mm, we plot only 10mm running averages of the data to remove noise. The ECM electrodes were manually dragged along the ice. The electrodes were aligned perpendicular to the core axis and 15mm apart. The effective resolution of the electrodes approximately equaled the distance between the electrodes (15mm); based on a physical principle that the electrical field decreases inversely proportional to the distance from a given location to each electrode. Within this distance, about 65% of the lines of electrical force cross. Measurement temperature is described in Fujita et al.(2002). All of the measured data were converted to values equivalent to -25C. For details, please see Fujita et al.(2002).
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