Effect of Aerosol on Photosynthetically Active Radiation
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Abstract
The effects of aerosol on radiation which plants use for photosynthesis or Photosynthetically Active Radiation (PAR) have been investigated. PAR, part of short-wave radiation (SR) with 400-700 nm in wavelengths is measured by a photosynthetically active radiometer (model MFR-7). The quantity of aerosols in atmosphere is measured as Aerosol Optical Depth (AOD). In addition, data of Light Intensity (LI) are collected for analysis with PAR and AOD. The instrument used in aerosol measurement is a sky-radiometer (POM-I). The solar radiation is measured by pyranometer. PAR, AOD and pyranometer data (May 2003 – April 2004) at Observatory for Atmospheric Radiation Research, Amphoe Sri Samrong ,Sukhothai Province have been collected. PAR parameters are total, diffuse and direct which were observed during sunrise. Data were then analyzed by a spread sheet program.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
References
Dye, D.G., 2007, MODIS based strategy for global monitoring of photosynthetically active radiation to support ecosystem modeling. 3rd MODIS Workshop on Monitoring and Modeling of Environment and Disaster in Asia January 15-16.