https://repository.kopri.re.kr/handle/201206/9422 Fri, 10 Jul 2026 13:00:05 GMT 2026-07-10T13:00:05Z https://repository.kopri.re.kr/handle/201206/16503 Title: Review of Recent Polar Climate Change and Its Impact Authors: Kim, Seong-Joong; Chung, Eui-Seok Abstract: Since the Industrial Revolution, the global average temperature has risen by 1.09℃, which is an unprecedented rate over the past several millenia. Arctic warming is occurring at a faster rate than the global average by three to four times. This rapid warming in the Arctic compared to the global average is called Arctic amplification. Arctic warming is contributing to the rapid decline of sea ice and glaciers. Delayed sea ice formation in autumn and winter strengthens high and low pressure systems in mid-latitudes as well as weakening the polar vortex, that intensifies cold and heat waves in mid-latitudes. In contrast to the Arctic, Antarctica exhibits distinct temperature changes. West Antarctica had warmed rapidly and experienced a decline in sea ice and ice sheets by around 2012, whereas East Antarctica had experienced a decline in temperature and an increase in sea ice and land ice. The decrease in temperature and increase in sea ice in Antarctica are linked to declining stratospheric ozone concentrations and appear to have resulted in part from low-latitude effects. However, since the early 2010s, temperatures have increased in all areas, and sea ice has decreased, indicating a possible shift in the Antarctic climate change regime. This study examines the causes of the different responses of the Arctic and Antarctic to increasing greenhouse gases.; 산업혁명 이후 전 지구 평균 기온은 1.09℃ 상승하였으며, 이는 지난 수천 년 동안 전례가 없는 속도이다. 북극 지역의 온난화는 전 지구 평균보다 3~4배 빠르게 진행되고 있으며, 이러한 현 상을 북극 온난화 증폭이라 한다. 북극의 급격한 온난화는 해빙과 빙하의 빠른 감소에 기여하고 있 다. 가을과 겨울철 해빙 형성의 지연은 중위도 지역의 고기압과 저기압계를 강화하고 극 소용돌이를 약화시켜, 중위도 지역에서 한파와 폭염을 더욱 심화시킨다. 북극과는 대조적으로 남극에서는 상이한 기온 변화 양상이 나타나고 있다. 서남극은 약 2012년까지 급격한 온난화를 겪으며 해빙과 빙상의 감소를 경험한 반면, 동남극은 기온 하강과 함께 해빙 및 육상빙의 증가를 보였다. 남극에서의 기온 감소와 해빙 증가는 성층권 오존 농도의 감소와 관련이 있으며, 이는 부분적으로 저위도 영향에 기 인한 것으로 보인다. 그러나 2010년대 초 이후에는 모든 남극 지역에서 기온이 상승하고 해빙이 감 소하는 경향이 나타나, 남극 기후 변화 체제가 전환되고 있을 가능성을 시사한다. 본 연구는 온실가 스 증가에 대한 북극과 남극의 상이한 반응 원인을 규명하고자 한다. Mon, 01 Dec 2025 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/16503 2025-12-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16823 Title: SODAR-based wind study at Jang Bogo Station, Antarctica, during the winter of 2017 Authors: Mohd Nor Mohd Fadzil Firdzaus; Chenoli Sheeba Nettukandy; Kim, Seong-Joong; Tang Malcolm S. Y.; Choi, Taejin; Abu Samah Azizan; Seo, Wonseok; Bae, Hyo-Jun Abstract: A Doppler Sonic Detection and Ranging (SODAR) wind-profiling system was deployed at Jang Bogo Station, Antarctica, during the summer of 2017. The parameters measured by the SODAR system were wind speed and direction averaged for 15 min from 30 m above the surface to 500 m aloft. Additionally, wind measurements obtained from the nearby walk-up tower and automatic weather station (AWS) were also used for additional data and comparison, respectively. The analysis and comparison used hourly average for consistency. The mean wind speed obtained from the SODAR measurement is highly correlated with those from the walk-up tower and the AWS measurements. All three measurements recorded westerlies during all strong wind events but varied during calm periods. The measurements also reveal that Jang Bogo Station experiences lower wind speeds compared to the nearest katabatic confluence region (Inexpressible Island), where the maximum airflow usually occurred. From the hourly averaged data, SODAR only detected a maximum wind speed of 18.1 m s-1. There were 238 occurrences of strong wind events equal to or above 10.8 m s-1 (Beaufort scale 6) from 10 May to 31 October 2017. These occurrences were recorded in 50 out of 175 days analysed in this study. From 10 to 12 June 2017, predominantly south-westerly-westerly winds were recorded at the surface and aloft during two strong wind events. Based on this case study, the boundary layer during calm and strong wind periods was also analysed. Mon, 01 Dec 2025 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/16823 2025-12-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16822 Title: Arctic Sea Ice Melting Controls Sea Spray Aerosol Production Authors: Dall'Osto Manuel; Park, Jiyeon; Lee, Youngju; Jung, Jinyoung; Kim, Joo-Hong; Yang, Eun Jin; Beddows David C. S.; Harrison Roy M.; Sellegri Karine; Skov Henrik; Massling Andreas; Yoon, Young Jun Abstract: The loss of Arctic Sea ice enlarges the ocean water surface exposed to wind speed, increasing the emissions of sea spray aerosols (SSAs). Given the unique evolution of upper ocean salinity waters and ice-associated ecosystems, it is crucial to improve Arctic-specific SSA parametrizations to represent the currently poorly understood feedback processes. Here, by using Arctic ship-borne in situ aerosol tank laboratory experiments, we study SSA produced from open ocean, open leads, and melt ponds. We find a complex nonlinear, yet unresolved variation in SSA production associated with salinity and organic composition. Specifically, we find that melt ponds drastically reduce SSA production, whereas ice algal microgels may enhance it. During the summer 2017 cruise (research vessel Araon), we also carried out aerosol ambient measurements across the Chukchi and East Siberian Seas. Size resolved ambient particle number concentrations reveal at least 17% and 42% of ambient number aerosol concentrations (N10-300 nm and N100-300 nm, respectively) are possibly attributable to SSA. Our results may help modeling experiments using SSA parametrization currently suffering from large uncertainty for constraining the sea spray emission fluxes from leads, melt ponds, and salinity gradients encountered in the Arctic Ocean. Mon, 01 Dec 2025 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/16822 2025-12-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16595 Title: Combined Influence of IPO and AAO on Dust Events in South America Authors: Cuicui Shi; Rui Mao; Kim, Seong-Joong; Dao-Yi Gong; Jingfang Fan; Xuechen Dong Abstract: Southern South America is an important dust source to Antarctica. However, there is a lack of overall understanding of the dust event variation in recent decades in South America. Here, we analyzed variations in the dust frequency in southern South America (south of 208S) from 1986 to 2020 and its causes with large-scale climatic factors, based on observational station data and reanalysis data. During the austral spring and summer, several stations recorded an average dust frequency exceeding 15 days, with some even surpassing 20 days. The frequency of dust events in spring exhibited a strong association with large-scale climate factors. Negative phases of the interdecadal Pacific oscillation (IPO) and the Antarctic Oscillation (AAO) were more likely to lead to an increase in the dust frequency in southern South America. The negative IPO had a greater impact on the Patagonia dust (south of 408S), resulted from a decrease in the drought index under the influence of downward motion. However, the negative AAO had a greater impact on the dust in South America over 208？408S by increasing strong wind frequency and decreasing the drought index over there. On longer time scales, model outputs from the Coupled Model Intercomparison Project phase 6 (CMIP6) also confirmed the combined influence of the negative IPO and negative AAO phases on southern South American dust. Sat, 01 Nov 2025 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/16595 2025-11-01T00:00:00Z