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Snow-Pit Record from a Coastal Antarctic Site and Its Preservation of Meteorological Features

Title
Snow-Pit Record from a Coastal Antarctic Site and Its Preservation of Meteorological Features
Authors
Nyamgerel, YalaltHong, Sang-BumHan, YeongcheolKim, SongyiLee, JeonghoonHur, Soon Do
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2021
Journal Title
EARTH INTERACTIONS
ISSN
1087-3562JCR Link
Citation
EARTH INTERACTIONS vol. 25, no. 1, pp. 108 - 118
Keywords
AntarcticaSea iceSnow
Publisher
AMER GEOPHYSICAL UNION
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Polar snow pits or ice cores preserve valuable information derived from the atmosphere on past climate and environment changes. A 1.57-m snow-pit record from the coastal site (Styx Glacier) in eastern Antarctica covering the period from January 2011 to January 2015 was discussed and compared with meteorological variables. The dominant contribution of the deposition of sea-salt aerosols due to the proximity of the site to the ocean and processes of sea ice formation was revealed in the ionic concentrations. Consistent seasonal peaks in delta O-18, dD, MSA, nssSO(4)(2-), and NO3- indicate the strong enhancement of their source during warm periods, whereas the sea-salt ions (Na+, K+, Mg2+, Ca2+, Cl-, and totSO(4)(2-)) exhibit a distinct distribution. Monthly mean delta O-18 positively correlates with the air temperature record from an automatic weather station (AWS) located in the main wind direction. Despite the shortness of the record, we suspect that the slight depletion of the isotopic composition and lowering of the snow accumulation could be related to the cooler air temperature with the decrease of open sea area. Consistency with previous studies and the positive correlation of sea-salt ions in the snow pit indicate the relatively good preservation of snow layers with noticeable climate and environmental signals [e.g., changes in sea ice extent (SIE) or sea surface temperature]. We report a new snow-pit record, which would be comparative and supportive to understand similar signals preserved in deeper ice cores in this location.
DOI
10.1175/EI-D-20-0018.1
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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