• Title/Summary/Keyword: 대기과학

Search Result 1,621, Processing Time 0.057 seconds

Characteristics of Atmospheric Aerosol Size Distribution in Seoul during Winter Months (겨울철 서울시 대기 에어로졸의 입경분포 특성)

  • 배귀남;김민철;임득용;문길주
    • Proceedings of the Korea Air Pollution Research Association Conference
    • /
    • 2002.04a
    • /
    • pp.165-166
    • /
    • 2002
  • 대기 에어로졸은 대도시 스모그, 대기오염물질의 장거리 이동, 황사, 지구기후 변화 등의 문제와 직접적으로 관련되며, 이러한 현상을 정확히 규명하기 위해서는 대기 에어로졸의 입경분포나 수 농도와 같은 에어고졸에 대한 상세한 정보가 필요하다. 한국과학기술연구원 지구환경연구센터에서는 대기를 사용하여 스모그 현상을 연구할 수 있는 실내 스모그 챔버를 보유하고 있다. (배귀남 등, 2001). 대기 중에 포함된 에어로졸 및 가스상 물질의 특성은 시간 및 공간에 따라 달라진다. (중략)

  • PDF

이달의 과학자 - 경희대 우주과학과 김상준 교수

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
    • /
    • v.30 no.6 s.337
    • /
    • pp.80-81
    • /
    • 1997
  • 지난 86년 목성에 적외선 오로라가 있을 것이라고 예언한 경희대 우주과학과 김상준교수는 끈질긴 노력 끝에 지난 91년 이 오로라의 모습을 담은 사진을 찍어 세계적인 과학전문지 "네이처"에 발표했다. 국제적인 "목성통" 학자로 미국 나사에서 12년간 일해온 김교수는 "지구의 대기는 대부분 산소와 질소여서 가시광선 혹은 자외선을 내는 오로라가 생기지만 목성의 대기는 90%가 수소여서 적외선을 내는 오로라가 생긴다"고 설명한다.

  • PDF

연구실 탐방-경희대 레이저 공학연구소

  • Korean Federation of Science and Technology Societies
    • The Science & Technology
    • /
    • v.31 no.6 s.349
    • /
    • pp.86-87
    • /
    • 1998
  • 우리나라는 매년 중국으로부터 오는 황사 때문에 피해를 보고 있지만 정확한 데이터가 없어 제대로 대처 할 수가 없었다. 그러나 경희대학교 레이저 공학연구소에서 레이저를 이용해 대기오염 물질과 황사 등의 농도를 정확히 측정해 내는 관측기기를 자체 개발함으로써 한반도 상공의 대기환경변화를 추정할 수 있는 자료를 보유할 수 있게 되었다.

  • PDF

Historical Development of Research and Publications in Atmospheric Physics Field (대기물리 분야 연구논문 발전 현황)

  • Seong Soo Yum;Kyu-Tae Lee;Jong-Jin Baik;Gyuwon Lee;Sang-Woo Kim;Junshik Um
    • Atmosphere
    • /
    • v.33 no.2
    • /
    • pp.105-124
    • /
    • 2023
  • Research papers published in the Korean Meteorological Society (KMS) journals by the members of KMS since the establishment of KMS in 1963 in the field of atmospheric physics are summarized. A significant number of research papers published in other international journals are also cited in this paper to highlight the achievement of the KMS members in international academic community. The aim is to illustrate the historical development of research activities of the KMS members in the field of atmospheric physics, and indeed it is found that the KMS members have made enormous progress in research publications quantitatively and qualitatively in the field of atmospheric physics. In detail, however, observational studies of aerosol physical properties and cloud and precipitation physics were very active, and studies on cloud physics parameterization for cloud modeling were highly recognized in the world, but observational and theoretical studies of atmospheric radiation were relatively lacking and solicit more contribution from the KMS members.

Atmospheric Boundary Layer Height Estimated based on 1.29 GHz Pulse Wave (1.29 GHz 펄스파로 산출한 대기경계층 고도)

  • Zi-Woo Seo;Byung-Hyuk Kwon;Kyung-Hun Lee;Geon-Myeong Lee
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.18 no.6
    • /
    • pp.1049-1056
    • /
    • 2023
  • The height of the atmospheric boundary layer indicates the peak developed when turbulence is generated by mixing heat and water vapor, and is generally determined through thermodynamic methods. Wind profilers produce atmospheric information from the scattering of signals sent into the atmosphere. A method for making the spectrum of turbulent components, turbulent kinetic energy dissipation rate, and refractive index structure coefficient was presented to determine the atmospheric boundary layer depth. Compared with the vertical distribution characteristics of potential temperature and specific humidity based on radiosonde data, the determination method of the atmospheric boundary layer height from wind profiler output was evaluated as very useful.

Comparison of the Vertical Data between Eulerian and Lagrangian Method (오일러와 라그랑주 관측방식의 연직 자료 비교)

  • Hyeok-Jin Bae;Byung Hyuk Kwon;Sang Jin Kim;Kyung-Hun Lee;Geon-Myeong Lee;Yu-Jin Kim;Ji-Woo Seo;Yu-Jung Koo
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.18 no.6
    • /
    • pp.1009-1014
    • /
    • 2023
  • Comprehensive observations of the Euler method and the Lagrangian method were performed in order to obtain high-resolution observation data in space and time for the complex environment of new city. The two radiosondes, which measure meteorological parameters using Lagrangian methods, produced air pressure, wind speed and wind direction. They were generally consistent with each other even if the observation points or times were different. The temperature measured by the sensor exposed to the air during the day was relatively high as the altitude increased due to the influence of solar radiation. The temporal difference in wind direction and speed was found in the comparison of Euler's wind profiler data with radiosonde data. When the wind field is horizontally in homogeneous, this result implies the need to consider the advection component to compare the data of the two observation methods. In this study, a method of using observation data at different times for each altitude section depending on the observation period of the Euler method is proposed to effectively compare the data of the two observation methods.

KSR-III 과학탑재 시스템 개발

  • Hwang, Seung-Hyun;Kim, Jhoon;Chun, Young-Doo;Kim, Yong-Ha;Jang, Min-Hwan
    • Aerospace Engineering and Technology
    • /
    • v.1 no.2
    • /
    • pp.83-90
    • /
    • 2002
  • This paper describes the development of scientific payload system onboard the KSR-III. The ozone detector(UVR), Langmuir electron probe(LEP), airglow photometer(AGP), and magnetometer(MAG) constitute this system. The purpose of the ozone detector is to measure the ozone density profile and the LEP measures the electron density and temperature in the ionosphere over the Korean Peninsula. The AGP detects airglow in the mesosphere over the Korean Peninsular. The MAG provides rocket attitude and the magnetic fluctuation information during the flight. With the developed payloads, the ground calibration tests and the environmental tests have been performed.

  • PDF