• Title/Summary/Keyword: Atmospheric science

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Classification of Synoptic Meteorological Patterns for the Environmental Assessment of Regional-scale Long Range Transboundary Air Pollutants (지역규모 장거리 대기오염 이동물질의 환경영향평가를 위한 종관기상 조건의 분류)

  • Kim, Cheol-Hee;Son, Hye-Young;Kim, Ji-A;Ahn, Tae-Keun
    • Journal of Environmental Impact Assessment
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    • v.16 no.1
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    • pp.89-98
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    • 2007
  • In order to conduct the environmental assessment of long range transboundary air pollutants over East Asia, the moving pathways of air pollutants are of great importance, which are depending upon the meteorological weather patterns. Therefore regional scale modeling study requires the identified geopotential height distribution patterns to deal with behaviors of long range transport air pollutants for the effective long term atmospheric environmental assessment. In this study the synoptic meteorological classification using cluster analysis technique over Northeast Asia, and its previous applications of the regional scale air pollutant modeling studies were reviewed and summarized in detail. Other synoptic meteorological characteristics over Korean peninsula are also discussed.

Net Radiation and Soil Heat Fluxes Measured on Coastal Wetland Covered with Reeds (갈대 서식 연안습지에서의 순복사와 토양열 플럭스)

  • Kim, Hee-Jong;Kim, Dong-Su;Yoon, Ill-Hee;Lee, Dong-In;Kwon, Byung-Hyuk
    • Journal of Environmental Science International
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    • v.16 no.2
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    • pp.233-239
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    • 2007
  • In the coastal wetland the mud is consist of fine particles, which means that it is characterized by small gap, and heat transfer is obstructed since moisture is found between the gaps. The relationship between net radiation ($R_N$) and soil heat flux($H_G$) shows a counterclockwise hysteresis cycle, which refer to a time lag behind in the maximal soil heat fluxes. The albedo is independent of seasonal variation of the vegetation canopy which plays very important roles to store and control the heat in the atmospheric surface layer.

Development of Atmospheric Pressure Plasma Sources in KRISS

  • Tran, T.H.;You, S.J.;Kim, J.H.;Seong, D.J.;Jeong, J.R.
    • Proceedings of the Korean Vacuum Society Conference
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    • 2011.08a
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    • pp.151-151
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    • 2011
  • Atmospheric-pressure plasmas are used in a variety of materials processes. The lifetime of most atmospheric-pressure plasma sources is limits by electrode erosion due to energetic ion bombardment. These drawbacks were solved recently by several microplasma sources based on microstrip structure, which are more efficient and less prone to perturbations than other microplasma sources. In this work, we propose microplasma sources based on strip line and microstrip line, developed for the generation of microplasmas even in atmospheric air and analyzes these systems with microwave field simulation via comparative study with two previous microwave sources (Microstrip Spit Ring Resonator (MSRR), Microstrip Structure Source (MSS)).

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