Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Aerosol Optical and Spectral Characteristics in Yellow Sand Events on April, 1998 in Seoul. Part I: Observation

분광복사계와 일사계 관측에 의한 황사 및 에어러솔의 광학적 특성 연구

  • Hye-Sook Park (Remote Sensing Research Laboratory, Meteorological Research Institute(METRI)) ;
  • Hyo-Sang Chung (Remote Sensing Research Laboratory, Meteorological Research Institute(METRI)) ;
  • Gyun-Myeong Bag (Remote Sensing Research Laboratory, Meteorological Research Institute(METRI)) ;
  • Hong-Ju Yoon (Remote Sensing Research Laboratory, Meteorological Research Institute(METRI))
  • Published : 1998.11.01
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Abstract

To examine the detectability of the yellow sand and/or aerosol from China crossing over the Yellow Sea within the range of OSMI wavelengths(400-900 nm), we have investigated the optical characteristics of aerosols in yellow sand events observed on April, 1998 in Seoul. The spectral reflectance(%) and aerosol optical thickness in the range of Visible(VIS) and near Infrared (NIR) wavelengths were derived from the measurements of solar radiation using the GER-2600 spectroradiometer and sunphotometer during the April, 1798. The average spectral reflectance for the yellow sand events is over 40% and higher around 14:30 than 12:00 LST, but that for clear days is about 20% both at 12:00 and 14:30 LST in the range of 500-900 nm. The aerosol optical thickness at 501 nm varied from 0.25 on very clear day to 1.01 during a so-called "yellow-sand" episode and that for 673 nm varied from 0.14 to 0.92, respectively.

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