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http://dx.doi.org/10.7780/kjrs.2012.28.1.011

Retrieval of Pollen Optical Depth in the Local Atmosphere by Lidar Observations  

Noh, Young-Min (School of Environmental Science & Engineering, Gwangju Institute of Science & Technology(GIST))
Lee, Han-Lim (Department of Atmospheric Sciences, Yonsei University)
Mueller, Detlef (School of Environmental Science & Engineering, Gwangju Institute of Science & Technology(GIST))
Lee, Kwon-Ho (Department of Satellite Geoinformatic Engineering, Kyungil University)
Choi, Young-Jean (Applied Meteorology Research Lab., National Institute of Meteorological Research (NIMR))
Kim, Kyu-Rang (Applied Meteorology Research Lab., National Institute of Meteorological Research (NIMR))
Choi, Tae-Jin (Department of Polar Climate Research, Korea Polar Research Institute (KOPRI))
Publication Information
Korean Journal of Remote Sensing / v.28, no.1, 2012 , pp. 11-19 More about this Journal
Abstract
Air-borne pollen, biogenically created aerosol particle, influences Earth's radiative balance, visibility impairment, and human health. The importance of pollens has resulted in numerous experimental studies aimed at characterizing their dispersion and transport, as well as health effects. There is, however, limited scientific information concerning the optical properties of airborne pollen particles contributing to total ambient aerosols. In this study, for the first time, optical characteristics of pollen such as aerosol backscattering coefficient, aerosol extinction coefficient, and depolarization ratio at 532 nm and their effect to the atmospheric aerosol were studied by lidar remotes sensing technique. Dual-Lidar observations were carried out at the Gwangju Institute of Science & Technology (GIST) located in Gwagnju, Korea ($35.15^{\circ}E$, $126.53^{\circ}N$) for a spring pollen event from 5 to 7 May 2009. The pollen concentration was measured at the rooftop of Gwangju Bohoon hospital where the building is located 1.0 km apart from lidar site by using Burkard trap sampler. During intensive observation period, high pollen concentration was detected as 1360, 2696, and $1952m^{-3}$ in 5, 6, and 7 May, and increased lidar return signal below 1.5km altitude. Pollen optical depth retrieved from depolarization ratio was 0.036, 0.021, and 0.019 in 5, 6, and 7 May, respectively. Pollen particles mainly detected in daytime resulting increased aerosol optical depth and decrease of Angstrom exponent.
Keywords
Pollen; Lidar; Depolarization ratio; optical depth; Angstrom exponent;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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