• Title/Summary/Keyword: 대기과학

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이달의 과학자 - 한국교원대 교수 정용승박사

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
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    • v.29 no.6 s.325
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    • pp.76-77
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    • 1996
  • 중국발원 대기오염 물질이 한반도에 유입된다는 사실을 세계 최초로 발견하여 그 원인을 규명한 한국교원대 정용승교수. 그는 83년이래 인공위성 관측자료를 통해 황사 및 대기오염 물질이 중국에서 황해를 거쳐 한반도에 유입되어 황산비 발생의 원인이 중국 대기오염물질이 기인함을 밝혀냈다.

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Local Enhancement Mechanism of Cold Surges over the Korean Peninsula (한반도 한파의 지역적 강화 메커니즘)

  • Lee, Hye-Young;Kim, Joowan;Park, In-Gyu;Kang, Hyungyu;Ryu, Hosun
    • Atmosphere
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    • v.28 no.4
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    • pp.383-392
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    • 2018
  • This study investigates synoptic characteristics of cold surges over South Korea during winter season (December-February). A total of 63 cold events are selected by quantile regression analysis using daily mean temperature observations from 11 KMA stations for 38 years (1979/80-2016/17). Large-scale pressure pattern during the cold surges is well characterized by high over Siberia and low over Aleutian regions, which elucidates cold advection over the Korean peninsula. However, the large-scale pattern cannot successfully explain the observed sudden decrease of temperature during the cold surges. Composite analyses reveal that a synoptic-scale cyclone developing over the northern Japan is a key feature that significantly contribute to the enhancement of cold advection by increasing pressure gradient over the Korean peninsula. Enhanced sensible and latent heat fluxes are observed over the southern ocean of Korea and Japan during the cold surges due to temperature and humidity differences between the near surface and the lower atmosphere over the ocean. The evaporated water vapor transported toward the center of the surface cyclone and condenses in the lower-to-middle troposphere. The released energy likely promotes the development of the surface cyclone by inducing positive PV near the surface of the heating region.

Analysis of Research in Earth Science at the Science Fair Using the Semantic Network Analysis: Focus on the Last 21 Years (2000-2020) (언어네트워크를 이용한 과학전람회 지구과학 부문 탐구주제 분석: 최근 21년(2000-2020년)을 중심으로)

  • Kyu-Seong Cho;Duk-Ho Chung;Dong-Gwon Jeong;Cheon-ji Kang
    • Journal of the Korean earth science society
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    • v.44 no.1
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    • pp.62-78
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    • 2023
  • The purpose of this study is to analyze the field of Earth science at a science fair. For this purpose, 566 pieces of data spanning 21 years (2000 to 2020), acquired from entries in the Earth Science section on the science fair website, were analyzed using the semantic network method. As a result, geoscience topics have been actively explored in works submitted for the Earth Science section of the science fair. Fossils from the Cretaceous period of the Mesozoic Era were particularly predominant. Together with these, keywords corresponding to astronomy, space science, and atmospheric science formed a small-scale network. Astronomy and space science mainly dealt with the dynamic characteristics of asteroids, Venus, and Jupiter. Other subjects included the solar system, sunspots, and lunar phases. Atmospheric science has focused on atmospheric physics, atmospheric observation and analysis technology, atmospheric dynamics, air quality monitoring, while marine science has been limited to physical oceanography and geologic oceanography. This study, is expected to help select Earth Science topics and conduct inquiry activities in schools.