Dome Fuji ice core gas data (112 - 2001m, 15N, O2/N2, Ar/N2) ...

• Main Authors: Oyabu, Ikumi, Kawamura, Kenji, Kitamura, Kyotaro, Hirabayashi, Motohiro, Aoki, Shuji, Morimoto, Shinji, Nakazawa, Takakiyo
• Format: Dataset
• Language: English
• Published: Arctic Data archive System (ADS), Japan 2021
• Subjects: CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>ICE CORE AIR BUBBLES; CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>ISOTOPES>ARGON ISOTOPES; CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>ISOTOPES>NITROGEN ISOTOPES; CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>IONS; CRYOSPHERE>GLACIERS/ICE SHEETS>ICE SHEETS; PALEOCLIMATE>ICE CORE RECORDS>ISOTOPES; PALEOCLIMATE>ICE CORE RECORDS>IONS; Dome Fuji; ice core
• Online Access: https://dx.doi.org/10.17592/001.2021043001; https://ads.nipr.ac.jp/dataset/A20210430-001

The variations of O2/N2 and Ar/N2 in the Dome Fuji ice core were measured from 112 m (bubbly ice) to 2001 m (clathrate hydrate ice) at high precision. Our method, combined with low storage temperature (-50 degreeC) successfully remove post-coring gas-loss fractionation signals from our data. From bubbly ice to the middle of bubble-clathrate transition zone (BCTZ) (112 - 800 m) and below the BCTZ (>1200 m), the O2/N2 and Ar/N2 data exhibit orbital-scale variations similar to local summer insolation. The data in the lower BCTZ (800 - 1200 m) have large scatters, which may be caused by mm-scale inhomogeneity of air composition combined with finite sample lengths. In the clathrate hydrate zone, the scatters around the orbital-scale variability decrease with depth, indicating diffusive smoothing of O2/N2 and Ar/N2. A simple gas diffusion model was used to reproduce the smoothing and thus constrain permeation coefficients of the gases. Relationship between Ar/N2 and O2/N2 is markedly different for the datasets ...