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https://repository.kopri.re.kr/handle/201206/4801
2024-03-29T15:11:28ZMapping Renewable Energy among Antarctic Research Stations
https://repository.kopri.re.kr/handle/201206/15069
Title: Mapping Renewable Energy among Antarctic Research Stations
Authors: Magnus de Witt; Chung, Changhyun; Lee, Joohan
Abstract: This paper presents an overview of current electricity generation and consumption patterns in the Antarctic. Based on both previously published and newly collected data, the paper describes the current status of renewable-energy use at research stations in the Antarctic. A more detailed view of electricity systems is also presented, demonstrating how different types of resources may be used and combined. The paper will serve as a guide to various renewable-energy generation technologies, highlighting well-established praxis, lessons learned, and potential ideas for im-provement. Several renewable electricity generation technologies that have proven effective for use in the Antarctic environment are described. as well as those that are currently in use. Finally, the paper summarizes the major lessons learned to support future projects and close the knowledge gap. The use of renewable-energy sources has the potential to reduce research stations’ greenhouse gas emissions, making research in Antarctica more sustainable. The availability of high-quality energy is crucial for survival and to allow scientists to conduct meaningful research at research stations under harsh Antarctic conditions.2024-01-01T00:00:00ZArctic/North Atlantic atmospheric variability causes severe PM10 events in South Korea
https://repository.kopri.re.kr/handle/201206/15089
Title: Arctic/North Atlantic atmospheric variability causes severe PM10 events in South Korea
Authors: 김정훈; 김맹기; Kim, Seong-Joong; Kim, Joo-Hong; 예상욱; 이상현; 이영석
Abstract: Severe PM10 (particulate matter with a diameter of <10 μm) events in South Korea are known to be caused by stable atmospheric circulation conditions related to high-pressure anomalies in the upper troposphere. However, research on why these atmospheric circulation patterns occur is unknown. In this study, we propose new large-scale teleconnection pathways that cause severe PM10 events during the midwinter in South Korea. This study investigated instances of extremely high (EH)-PM10 in South Korea during mid-winter and examined the corresponding atmospheric teleconnection patterns to identify the factors contributing to EH-PM10 events. K-means clustering analysis revealed that EH-PM10 instances were associated with two large-scale teleconnection patterns. Cluster 1 exhibited a wave train pattern originating in the North Atlantic that developed from Eurasia to the Korean Peninsula. Cluster 2 was associated with a wave-like teleconnection pattern from the Barents-Kara Sea to the Korean Peninsula. The Rossby waves, triggered by the North Atlantic and the Arctic, propagated and weakened the surface pressure system. This led to a high-pressure anomaly over the Korean Peninsula, reducing atmospheric ventilation and causing a rapid increase in PM10 concentration within a few days. Furthermore, an experiment involving a linear baroclinic model established that atmospheric forcing in upstream regions has the potential to induce large-scale atmospheric teleconnection patterns, resulting in EH-PM10 cases in South Korea. These findings emphasize the ventilation effect and transport of PM10 concentrations modulated by two large-scale teleconnection patterns originating from the Arctic and North Atlantic, leading to EH-PM10 events in South Korea. Understanding this combined phenomenon may assist in the implementation of emission reduction measures based on the results of short-term forecasts of severe PM10 events.2024-01-01T00:00:00ZPleistocene glaciomarine laminated muds in the Central Basin of the northwestern Ross Sea and their palaeoceanographic records
https://repository.kopri.re.kr/handle/201206/15082
Title: Pleistocene glaciomarine laminated muds in the Central Basin of the northwestern Ross Sea and their palaeoceanographic records
Authors: 김부근; 손영관; 이민경; Kim, Sunghan; Lee, Jae Il; Yoo, Kyu-Cheul
Abstract: Glaciomarine laminated muds around the Antarctic continental margin are important in the marine geological record related to ice sheet dynamics. Microscopic observa tion and backscattered electron imagery of Pleistocene laminated muds in the Central Basin (Ross Sea) reveal that the light laminae comprise terrigenous angular to sub angular silt-sized particles, scattered diatom fragments, and eroded sand-sized lumps of fossil-bearing mud. In contrast, the dark laminae are clayey and biogenic with very tiny pieces of fossils. These laminated muds are interpreted to have been deposited by subglacial meltwater plumes underneath the advancing glaciers that torn off the earlier-deposited and semi-consolidated diatom-rich sediments. Thus, most biogenic components of these laminated muds were recycled from older deposits, indicating that they are not related to enhanced biological production during the mud deposi tion. Our study suggests that the recycling of biogenic particles should be consid ered when interpreting the palaeoclimatic and palaeoceanographic implications of Antarctic environmental system.2024-01-01T00:00:00ZHigh Salinity Shelf Water production rates in Terra Nova Bay, Ross Sea from high-resolution salinity observations
https://repository.kopri.re.kr/handle/201206/15121
Title: High Salinity Shelf Water production rates in Terra Nova Bay, Ross Sea from high-resolution salinity observations
Authors: Una Kim Miller; Christopher J. Zappa; Arnold L. Gordon; Seung-Tae Yoon; Craig Stevens; Lee, Won Sang
Abstract: High Salinity Shelf Water (HSSW) formed in the Ross Sea is a precursor to Antarctic Bottom Water(AABW), a water mass that constitutes the bottom limb of the global overturning circulation. HSSW production rates are poorly constrained, as in-situ observations are scarce. Here, we present high vertical-and-temporal-resolution salinity time series collected in austral winter 2017 from a mooring in Terra Nova Bay (TNB), one of two major sites of HSSW production in the Ross Sea. We calculate an annual-average HSSW production rate of ~0.4 Sv (106 m3 s-1), which we use to ground truth additional estimates across 2012 - 2021 made from parametrized net surface heat fluxes. We find sub seasonal and interannual variability on the order of 0.1 Sv, with a strong dependence on variability in open-water area that suggests a sensitivity of TNB HSSW production rates to changes in the local wind regime and offshore sea ice pack.2024-01-01T00:00:00Z