KOPRI Repository

Seasonal variability of isotopes and chemistry in a coastal firn core from the Amundsen Sea, West Antarctica

Cited 0 time in wos
Cited 0 time in scopus
Title
Seasonal variability of isotopes and chemistry in a coastal firn core from the Amundsen Sea, West Antarctica
Authors
Shin, Jinhwa
Han, Yeongcheol
Hong, Sang-Bum
Jung, HyeJin
Chang, Chaewon
Moon, Jangil
Kim, Minjeong
Bong, Hayoung
Yoshimura, Kei
Lee, Jaeseok
Lee, Seungmi
Ro, Seokhyun
Kim, Songyi
Hur, Soon Do
Keywords
Antarcticapaleoclimateice coresmajor ionswater stable isotopes
Issue Date
2025
Publisher
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
Citation
Shin, Jinhwa, et al. 2025. "Seasonal variability of isotopes and chemistry in a coastal firn core from the Amundsen Sea, West Antarctica". NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS, 68(5): 1207-1218.
Abstract
The West Antarctic Ice Sheet (WAIS) is undergoing significant ice loss, causing global sea level rise and posing a critical threat to coastal communities worldwide (Shepherd et al. 2018; Rignot et al. 2019). We analyzed stable isotopes, major ions, and hydrogen peroxide (H2O2) in a 10.11 m shallow ice core from Moore Dome, West Antarctica, to provide a basis for future deep ice-core studies. Seasonal peaks in H2O2, methanesulfonic acid (MSA, CH3SO3-), and non-sea-salt sulphate (nss-SO42-) served as annual layer markers, yielding a chronology from austral spring/summer 2012 to 2016 and a mean accumulation rate of 1.25 m w.e. yr(-)(1). The delta D-delta O-1(8) slope of 7.93 closely matches the Global Meteoric Water Line (GMWL, slope = 8; Dansgaard 1964), indicating minimal post-depositional alteration. Comparisons with IsoGSM model output confirm that delta O-1(8) reliably reflects regional climate variability. Variations in sea-salt ions (Na+, Cl-, K+, Mg-2(+), Ca-2(+)) and biogenic sulphate (MSA, nss-SO42-) reflect seasonal marine influences, including winter sea spray and summer phytoplankton blooms. These findings highlight Moore Dome's capacity to preserve high-resolution climate signals and demonstrate the value of integrating observational records with models to improve understanding of long-term WAIS instability.
URI
https://repository.kopri.re.kr/handle/201206/16009
DOI
http://dx.doi.org/10.1080/00288306.2025.2510383
Type
Article
Station
Araon
Indexed
SCIE
Appears in Collections  
2025-2025, 국제심부빙하시추 네트워크를 활용한 대기-빙상 상호작용의 자연적·인위적 특성 규명 (25-25) / 한영철 (PE25100)
Files in This Item
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse