https://repository.kopri.re.kr/handle/201206/5528 Tue, 07 Apr 2026 05:38:04 GMT 2026-04-07T05:38:04Z https://repository.kopri.re.kr/handle/201206/7359 Title: A Study on high-resolution seasonal variations of major ionic species in recent snow near the antarctic Jang Bogo Station Authors: Hur, Soon Do; Hong, Sang-Bum; Lee, Jeonghoon; Hong, Sung-Min; 장채원; Kang, Jung-Ho; Kwak, Hoje Abstract: A continuous series of 60 snow samples was collected at a 2.5-cm interval from a 1.5-m snow pit at a site on the Styx Glacier Plateau in Victoria Land, Antarctica, during the 2011/2012 austral summer season. Various chemical components (δD, δ18O, Na+, K+, Mg2+, Ca2+, Cl？, SO4 2？, NO3？, F？, CH3SO3？,CH3CO2？ and HCO2？) were determined to understand the highly resolved seasonal variations of these species in the coastal atmosphere near the Antarctic Jang Bogo station. Based on vertical profiles of δ18O, NO3？ and MSA, which showed prominent seasonal changes in concentrations, the snow samples were dated to cover the time period from 2009 austral winter to 2012 austral summer with a mean accumulation rate of 226 kg H2O m？2 yr？1. Our snow profiles show pronounced seasonal variations for all the measured chemical species with a different pattern between different species. The distinctive feature of the occurrence patterns of the seasonal variations is clearly linked to changes in the relative strength of contributions from various natural sources (sea salt spray, volcanoes, crust-derived dust, and marine biogenic activities) during different short-term periods. The results allow us to understand the transport pathways and input mechanisms for each species and provide valuable information that will be useful for investigating long-term (decades to century scale periods) climate and environmental changes that can be deduced from an ice core to be retrieved from the Styx Glacier Plateau in the near future. Thu, 01 Jan 2015 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/7359 2015-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/6199 Title: Evidence of air-snow mercury exchange recorded in the snowpack at Dome Fuji, Antarctica Authors: Han, Yeongcheol; Hideaki Motoyama; Hur, Soon Do; Hong, Sung-Min; Huh, Youngsook Abstract: Measuring the mercury content in shallow Antarctic snow pits is useful for understanding the mercury dynamics of the Antarctic Plateau and the global mercury cycle and for interpreting ice core data. We determined the total mercury concentration (HgT) in snow samples successively collected at 5 cm intervals from two 4 m deep snow pits at Dome Fuji. The measured mercury concentration varied between 0.32 (the detection limit) and 2.93 pg g？1 (n = 160) with depth and was lower than that of summertime surface snow that was sampled simultaneously. This finding is consistent with previous observations that a bidirectional exchange of mercury between the snowpack and the atmosphere led to an increase in HgT in the surface snow during the summer. However, the contribution of the air-snow Hg exchange to the net Hg sequestration was offset by the intense re-emission of deposited mercury over the past ~50 years. Our results demonstrate that the Antarctic Plateau snowpack is a temporary reservoir of mercury rather than a permanent sink. Wed, 01 Jan 2014 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/6199 2014-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/7259 Title: Establishment of an Ice Core Processing Method and Analytical Procedures for Fundamental Proxies Authors: Jung, HyeJin; Hur, Soon Do; Hong, Sang-Bum; Joon, Seong Jun; Hong, Sung-Min; Han, Changhee; Chung, Ji Woong; Hwang, Heejin; Kang, Jung-Ho; Lee, Jeonghoon Abstract: We established the first complete ice core processing method and analytical procedures for fundamental proxies, using a 40.2 m long ice core drilled on the Mt. Tsambagarav glacier in the Mongolian Altai mountains in July 2008. The whole core was first divided into two sub ice core sections and the measurements of the visual stratigraphy and electrical conductivity were performed on the surface of these sub core sections. A continuous sequence of samples was then prepared for chemical analyses (stable isotope ratios of oxygen (18O/16O) and hydrogen (2H/1H), soluble ions and trace elements). A total of 29 insoluble dust layers were identified from the measurement of visual stratigraphy. The electrical conductivity measurement (ECM) shows 11 peaks with the current more than 0.8 μA. Comparing the profiles of SO42？ and Cl？ concentrations to correlate with known volcanic eruptions, the first two ECM peaks appear to be linked to the eruptions (January and June 2007) of Kliuchevskoi volcano on the Kamchatka Peninsula of Russia, which supports the reliability of our ECM data. Finally, the composition of stable isotopes (δ18O and δD) shows a well-defined seasonal variation, suggesting that various chemical proxies may have been well preserved in the successive ice layers of Tsambagarav ice core. Our ice core processing method and analytical procedures for fundamental proxies are expected to be used for paleoclimate and paleoenvironmental studies from polar and alpine ice cores. Wed, 01 Jan 2014 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/7259 2014-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/6198 Title: A seasonality of δD of water vapor (850？ 500 hPa) observed from space over Jeju Island, Korea Authors: Koh, Dong-Chan; Lee, Jungeun; K.Yoshimura; J.Worden; Lee, Jeonghoon Abstract: We examined the seasonal variations of isotopic composition of water vapor in the lower troposphere (850？ 500 hPa) to relate those of precipitation and groundwater using satellite observations from the Aura Tropospheric Emission Spectrometer (TES) over the volcanic Island of Jeju, Korea.ectrometer (TES) over the volcanic Island of Jeju, Korea. Tue, 01 Jan 2013 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/6198 2013-01-01T00:00:00Z