https://repository.kopri.re.kr/handle/201206/5498 2026-04-19T03:38:47Z https://repository.kopri.re.kr/handle/201206/5966 Title: Surface Flux Measurements at King Sejong Station in West Antarctica: 1. Turbulent Characteristics and Sensible Heat Flux Authors: Choi, Taejin; SHIM, JAE-SEOL; Lee, Hee-Choon; Lee, Bang Yong Abstract: The Antarctic Peninsula is important in terms of global warming research due to pronounced increase of air temperature over the last century. The first eddy covariance system was established at King Sejong Station located in the northern region of the Antarctic Peninsula in December of 2002 and has been operated over one year. Here, we analyze turbulent characteristics to determine quality control criteria for turbulent sensible heat flux data as well as to diagnose the possibility of long term eddy covariance measurement under extreme weather conditions of the Antarctic Peninsula. We also report the preliminary result on sensible heat flux. Based on the analyses on turbulent characteristics such as integral turbulence characteristics of vertical velocity (w) and heat (T), stationarity test and investigation of correlation coefficient, they follow the Monin-Obukhov similarity and eddy covariance flux data were reliable. ~47% of total retrieved sensible heat flux data could be used for further analysis. Daytime averaged sensible heat flux showed a pronounced seasonal variation, with a maximum of up to 300 Wm-2 in summer. In conclusion, continuous and long-term eddy covariance measurement may be possible at the study site and the land surface may influence the atmosphere significantly through heat transport in summer. 2004-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/5945 Title: Influence of glacial runoff on baseline metal accumulation in the Antarctic limpet Nacella concinna from King George Island Authors: Ahn, In-Young; Choi, Heeseon J.; Chung, Kyung Ho Abstract: Abstract: Natural variability of baseline metal levels was investigated for the Antarctic limpet Nacella concinna with reference to massive land runoff (glacial-melt water inflow) during the summer months. Spatial variations in metal concentrations were investigated for the Antarctic limpet Nacella concinna on King George Island. A distinct temperature gradient was developed in the bay with lower temperatures near submerged glaciers and ice-melt water streams. Al concentrations were notably elevated in seawater at the sites where the surface water temperature was lower, indicating massive input of lithogenic particles along the melt water. Fe, Mn, Cu, Pb and Cr concentrations showed distributional patterns very similar to that of Al, and these concentrations were correlated highly with the concentrations of Al., clearly showing that the metals were associated with lithogenic particles introduced into the bay along with the glacier melt-water. Limpets were collected from several intertidal sites of varying degree of ice-melt water influence. In the limpet tissue Fe, Mn, Cu, Pb and other metals of the lithogenic sources are also found to be highly elevated at the sites close to the sources of the glacial melt-water input, showing that these elevations are natural. Thus metal levels in the limpet, Nacella concinna closely reflect gradients in physical environment, demonstrating the excellent 'indicator' properties of N. concinna. In particular, levels of Mn and Cu concentrations in the tissues of N. concinna near the melt-water sources were comparable to the values found in other patellid limpets from polluted waters. The results of this study suggest that spatial (probably temporal) variations in metal accumulation associated with melt-water inflow should be taken into account in elucidating baseline metal concentration of Antarctic marine biomonitor species. 2004-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/5963 Title: Implication of the change in overturning circulation to the LGM CO2 budget Authors: Lee, Bang Yong; Kim, Seong-Joong; Kim, Yeadong; Yoon, Ho Il Abstract: The observational proxy estimates suggest that the North Atlantic overturning stream function associated with the North Atlantic Deep Water (NADW) production and outflow was substantially weaker during the last glacial maximum (LGM) than that observed under present conditions. The impact of the changes in overturning circulation on the glacial carbon budget is investigated using a box model. The carbon box model reveals that the atmospheric CO2 concentration is more sensitive to change in the overturning circulation of the North Atlantic than that of the Southern Ocean, especially when North Atlantic overturning becomes weaker. For example, when the strength of the North Atlantic overturning circulation is halved, the atmospheric CO2 concentration is reduced by 50ppm of that associated with the accumulation of CO2 in the deep ocean. This result implies that a weaker North Atlantic overturning circulation may play an important role in the lowering of LGM atmospheric CO2 concentration. 2004-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/8081 Title: The effect of cloud for transmission of Erythemal UV-B Authors: 이윤곤; Lee, Bang Yong; Kim, Jun; Cho, Hi Ku Abstract: 남극 세종기지에서 1998년-2002년까지 관측한 홍반 자외선 복사량과 운량을 이용하여 운량에 대한 B파장 홍반 자외선 복사량의 투과 효과를 알아보기 위하여 구름에 대한 B파장 홍반 자외선 복사량의 투과율을 태양천정각과 운량에 따라 구하였다 2004-01-01T00:00:00Z