라이다와 스카이 라디오미터 관측 자료를 이용한 서울지역 라이다 비의 특성 분석
Characteristics of the Lidar Ratio Determined from Lidar and Sky Radiometer Measurements in Seoul
1
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
Aerosol lidar ratio (extinction-to-backscatter ratio) at 532 nm was determined using 4-year measurements of elastic-backscatter lidar and sky radiometer at Seoul National University of Seoul, Korea. The mean lidar ratio (with standard deviation) based on 4 years of measurements is found to be 61.7±16.5 sr, and weak seasonal variations are noted with a maximum in JJA (68.1±16.8 sr) and a minimum in DJF (57.2±17.9 sr). The lidar ratios for clean,dust, and polluted conditions are estimated to be 45.0±9.5 sr, 51.7±13.7 sr, and 62.2±13.2 sr,respectively. While the lidar ratio for the polluted condition is appears to be consistent with previous studies, clean and dust conditions tend to have larger ratios, compared to previous estimates. This discrepancy is thought to be mainly due to the anthropogenic aerosols existing throughout the year around Seoul, which may cause increased lidar ratios even for clean and dust conditions.
Abstract
Aerosol lidar ratio (extinction-to-backscatter ratio) at 532 nm was determined using 4-year measurements of elastic-backscatter lidar and sky radiometer at Seoul National University of Seoul, Korea. The mean lidar ratio (with standard deviation) based on 4 years of measurements is found to be 61.7±16.5 sr, and weak seasonal variations are noted with a maximum in JJA (68.1±16.8 sr) and a minimum in DJF (57.2±17.9 sr). The lidar ratios for clean,dust, and polluted conditions are estimated to be 45.0±9.5 sr, 51.7±13.7 sr, and 62.2±13.2 sr,respectively. While the lidar ratio for the polluted condition is appears to be consistent with previous studies, clean and dust conditions tend to have larger ratios, compared to previous estimates. This discrepancy is thought to be mainly due to the anthropogenic aerosols existing throughout the year around Seoul, which may cause increased lidar ratios even for clean and dust conditions.
참고문헌 (28)
- 이시혜, "서울과 고산의 에어로졸 화학성분과 광학특성의 계절변화", 한국대기환경학회지, 24(4), pp.470~482 (2008), 한국대기환경학회
- Anderson, T. L., "In situ measurements of the aerosol extinctiontobackscatter ratio at a polluted continental site", Journal of Geophysical Research, 105, pp.26907~26915 (2000)
- Ansmann, A., F, "European pollution outbreaks during ACE 2: Lofted aerosol plumes observed with Raman lidar at the Portuguese coast", Journal of Geophysical Research, 106, pp.20733~20733 (2001)[DOI]
- Cattrall, C., "Variability of aerosol and spectral lidar and backscatter and extinction ratios of key aerosol types derived from selected Aerosol Robotic Network locations, Journal of Geophysical Research", Journal of Geophysical Research, 110, pp.D10S11~ (2005)[DOI]
- Chazette, P, "Optical properties of urban aerosol from airborne and ground-based in situ measurements performed during the Etude et Simulation de la Qualité de l'air en Ile de France (ESQUIF) program", Journal of Geophysical Research, 110, pp.D02206~ (2005)[DOI]
- Doherty, Sarah J, "Measurement of the Lidar Ratio for Atmospheric Aerosols with a 180° Backscatter Nephelometer", Applied Optics, 38, pp.1823~1832 (1999)
- Dubovik, O., "Application of spheroid models to account for aerosol particle nonsphericity in remote sensing of desert dust", Journal of Geophysical Research, 111, pp.D11208~ (2006)[DOI]
- Fernald, F. G., "Analysis of atmospheric lidar observations: some comments", Applied Optics, 23, pp.652~653 (1984)
- Franke, K., "One-year observations of particle lidar ratio over the tropical Indian Ocean with Raman lidar", Geophysical Research Letters, 28, pp.4559~4562 (2001)
- He, Q. S, "A study on the aerosol extinction-to-backscatter ratio with combination of micro-pulse LIDAR and MODIS over Hong Kong", Atmospheric Chemistry and Physics, 6, pp.3243~3256 (2006)[DOI]
- Jeong, Myeong-jae, "Quality, compatibility, and synergy analyses of global aerosol products derived from the advanced very high resolution radiometer and Total Ozone Mapping Spectrometer", Journal of Geophysical Research, 110, pp.D10S08~ (2005)[DOI]
- Jung, J.,, "Spectral optical properties of long-range transport Asian dust and pollution aerosols over Northeast Asia in 2007 and 2008", Atmospheric Chemistry and Physics, 10, pp.5391~5408 (2010), COPERNICUS PUBLICATIONS
- Kaufman, Y. J., "Remote sensing of vertical distributions of smoke aerosol off the coast of Africa", Geophysical Research Letters, 30(16), pp.1831~ (2003)[DOI]
- 김상우, "Seasonal and monthly variations of columnar aerosol optical properties over east Asia determined from multi-year MODIS, LIDAR, and AERONET Sun", sky radiometer measurements, 200703, pp.41, 1634~1651[DOI]
- Klett, J. D., "Stable analytical inversion solution for processing lidar returns", Applied Optics, 20(2), pp.211~220 (1981)
- Léon, J.-F., "Profiling of a Saharan dust outbreak based on a synergy between active and passive remote sensing", Journal of Geophysical Research, 108(D18), pp.8575~ (2003)[DOI]
- Liu, Z, "Extinction- To-Backscatter Ratio of Asian Dust Observed With High-Spectral-Resolution Lidar and Raman Lidar", Applied Optics, 41, pp.2760~2767 (2002)
- McPherson, C. J., "AERONET, airborne HSRL, and CALIPSO aerosol retrievals compared and combined: A case study", Journal of Geophysical Research, 115, pp.D00H21~ (2010)[DOI]
- Mishchenko, M. I., "Light-scattering by size shape distributions of randomly oriented axially-symmetrical particles of a size comparable to a wavelength", Applied Optics, 32(24), pp.4652~4666 (1993)
- Murayama, T., "An intercomparison of lidar-derived aerosol optical properties with airborne measurements near Tokyo during ACE-Asia", Journal of Geophysical Research, 108(D23), pp.8651~ (2003)[DOI]
- Nakajima, T., "Use of sky brightness measurements from ground for remote sensing of particulate polydispersions", Applied Optics, 35, pp.2672~2686 (1996)
- Noh, Y. M., "Aerosol lidar ratio characteristics measured by a multiwavelength Raman lidar system at Anmyeon Island, Korea", Atmospheric Research, 86, pp.76~87 (2007)[DOI]
- Sasano, Y., "Error caused by using a constant extinction", backscattering ratio in the lidar solution, 1985, pp.24, 3929~3932
- Tesche, M., "Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China", Applied Optics, 46, pp.6302~6308 (2007)
- Voss, K. J, "Lidar measurements during Aerosols99", Journal of Geophysical Research, 106(20), pp.821~831 (2001)[DOI]
- Welton, E. J., "Ground-based lidar measurements of aerosols during ACE-2: instrument description, results, and comparisons with other ground-based and airborne measurements", Tellus B, 52, pp.636~651 (2000)[DOI]
- Winker, D. M., "The CALIPSO Mission: A Global 3D View Of Aerosols And Clouds", Bulletin of the American Meteorological Society, 91, pp.1211~1229 (2009)[DOI]
- Yoon, S.-C., "Ground-based mie-scattering lidar measurements of aerosol extinction profiles during ABC-EAREX 2005: Comparisons of instruments and inversion algorithms", JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 86, pp.377~396, METEOROLOGICAL SOC JPN