KOPRI Repository

Seasonal variations of snow chemistry and mineral dust in the snow pit at GV7, Antarctica

Cited 0 time in wos
Cited 0 time in scopus
Title
Seasonal variations of snow chemistry and mineral dust in the snow pit at GV7, Antarctica
Authors
Kang, Jung-Ho
Hwang, Heejin
Han, Yeongcheol
Hong, Sang-Bum
Lee, Khanghyun
Hur, Soon Do
Frezzotti, Massimo
Narcisi, Biancamaria
Issue Date
2015
Citation
Kang, Jung-Ho, et al. 2015. Seasonal variations of snow chemistry and mineral dust in the snow pit at GV7, Antarctica. EGU2015. Vienna. 2015.04.12-17.
Abstract
We conducted the scientific ice coring project led by PNRA and KOPRI during the 2013/2014 Italian-Korean Antarctic Expedition in the framework of International Partnerships in Ice Core Science (IPICS) to understand the climatic variability in the last 2000 years. In the part of project, we collected a 3.0 m-depth snow pit at the site of GV7 (S 70°41'17.1", E 158°51'48.9", 1950 m a.s.l.), Antarctica. Here, we present the results obtained from the analysis of the water isotope compositions, the major ion concentrations, and the mineral dust concentrations from the snow pit. Snow densities and temperatures also measured in the field. At KOPRI, the samples were melted, then the stable water isotopes, major ions, and particle size distribution were analyzed with the cavity ring-down spectrometers (L1102-i, Piccaro), ion chromatography (ICS-2100, Thermo), and coulter counter (Multisizer 3, Beckman Coulter), respectively. The 18O varies between -38.3 and -24.1‰ with a mean value of -31.0‰. The δD ranges between -331 and -186‰ with a mean value of -243‰. Among the ion concentrations (Na+, Ca2+, Mg2+, Cl-, SO42-, MSA) from the snow pit, MSA concentrations show a clear seasonal variation. The mineral dust in the pit characterized with the differences of the concentration and the particle size distribution by the seasonality. These data allow us to assume about 4.5 years of snow deposition covered from 2009 to 2013 by these oscillations of the isotopes and geochemical characteristics.
Conference Name
EGU2015
Conference Place
Vienna
Conference Date
2015.04.12-17
Type
Poster
Appears in Collections  
2014-2016, Investigation of Climate Change Mechanism by Observation and Simulation of Polar Climate for The Past and Present (14-16) / Kim, Seong-Joong (PE14010; PE15010; PE16010)
Files in This Item

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

Browse