A preliminary study for blue ice in Victoria Land, East Antarctica

Jang, Yong-Seok; Han, Yeongcheol; Ryu, Young‐Hee; Moon, Jangil; Ju, Hyeontae; Yang, Ji‐Woong; Lee, Hun-Gyu; Jun, Seong Joon; Lee, Joohan; Hur, Soon Do; Lee, Jong Ik; Ahn, Jinho

doi:10.14770/jgsk.2017.53.4.567

Cited by 4 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Altered CH4 proximity to the surface is also by reported by Petrenko et al (2006) and Baggenstos et al (2017). However, the CO2 mixing ratio of the TF core, reported by Jang et al (2017), shows that CO2 is scattered even in the deeper part of the ice core. We speculate that this scattering of CO2 can be due to complicated ice stratigraphy because we observed many folding structures identified by dust bands near the TF core site (Fig.…”

Section: Ch4 and Co2 Mixing Ratiossupporting

confidence: 56%

“…We also collected near-surface ice samples (~500 g) along a 1.3 km transect with 20 m intervals to measure stable water isotopes of the ice (δ 18 Oice, δ 2 Hice) at depths of ~5-10 cm (hereafter, regarded as the surface ice sample). The ice core TF (74.93042° S, 161.56975° E) with a length of ~12 m on the upstream side was sampled in 2016 for a preliminary study, as described by Jang et al (2017). To define the horizontal distance, we used an imaginary line parallel to the ice flow direction.…”

Section: Larsen Blue Ice Area (Bia)mentioning

confidence: 99%

See 1 more Smart Citation

Chronostratigraphy of blue ice at the Larsen Glacier in Northern Victoria Land, East Antarctica

Lee

Ahn

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Blue ice areas (BIAs) allow for the collection of large-sized old ice samples in a cost-effective way because deep ice outcrops and make old ice samples available close to the surface. However, most chronostratigraphy studies on blue ice are complicated due to fold and fault structures. Here, we report a simple stratigraphy of ice from the Larsen BIA, Antarctica, making the area valuable for paleoclimate studies. Ice layers defined by dust bands and ground penetration radar (GPR) surveys indicate a monotonic increase in age along the ice flow direction on the downstream side, while the upstream ice exhibits a potential repetition of ages on scales of tens of meters, as shown in the complicated fold structure. Stable water isotopes (δ18Oice and δ2Hice) and components of the occluded air (i.e., CO2, N2O, CH4, δ15N-N2, δ18Oatm (= δ18O-O2), δO2/N2, δAr/N2, 81Kr and 85Kr) were analyzed for surface ice and shallow ice core samples. Correlating δ18Oice, δ18Oatm, and CH4 records of Larsen ice with existing ice core records indicates that the gas age at shallow coring sites ranges between 9.2–23.4 ka BP and ice age for entire surface sampling sites between 5.6–24.7 ka BP. Absolute radiometric 81Kr dating for the two cores confirms the ages within acceptable levels of analytical uncertainty. Our study demonstrates that BIA in northern Victoria Land may help researchers obtain high-quality records for paleoclimate and atmospheric greenhouse gas compositions through the last deglaciation.

show abstract

Section: Ch4 and Co2 Mixing Ratiossupporting

confidence: 56%

Section: Larsen Blue Ice Area (Bia)mentioning

confidence: 99%