Abstract
As compared to other methods, measurement of aerosol optical depth (AOD) using sunphotometers offer several advantages. However, it suffers a drawback as calibration of the instrument required to be performed at high altitude due to temporal drifts in the atmospheric condition during the calibration. To solve this, a new Langley calibration algorithm has been designed for AOD measurement using spectroradiometer instrument. The key advantages of the proposed algorithm are its objectivity, computational efficiency and the ability to detect short intervals of cloud transits. It avoids travelling to high altitude mountain that the conventional calibration procedure always practiced for frequent calibration. Most importantly, neither it requires priori knowledge of the instrument calibration nor a collocated calibrated instrument for nominal calibration transfer to perform the cloud-screening procedure.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Alexandrov MD, Marshak A, Cairns B et al (2004) Automated cloud screening algorithm for MFRSR data. Geophys Res Lett 31:L04118. doi:10.1029/2003GL019105
Augustine JA, Cornwall CR, Hodges GB et al (2003) An automated method of MFRSR calibration for aerosol optical depth analysis with application to an Asian dust outbreak over the United States. J Appl Meteorol 42:266–278
Chang JHW, Dayou J, Sentian J (2014) Development of near-sea-level calibration algorithm for aerosol optical depth measurement using ground-based spectrometer. Aerosol Air Qual Res 14:386–395
Djamila H, Ming CC, Kumaresan S (2011) Estimation of exterior vertical daylight for the humid tropic of Kota Kinabalu city in East Malaysia. Renew Energy 36:9–15
Harrison L, Michalsky J (1994) Objective algorithms for the retrieval of optical depths from ground-based measurements. Appl Opt 33:5126–5132
Long CN, Ackerman TP (2000) Identification of clear skies from broadband pyranometer measurements and calculation of downwelling shortwave cloud effects. J Geophys Res 105:609–626
Michalsky JJ, Schlemmer JA, Berkheiser WE et al (2001) Multiyear measurements of aerosol optical depth in the Atmospheric Radiation Measurement and Quantitative Links programs. J Geophys Res 106:12009–12107
Perez R, Ineichen P, Seals R et al (1990) Modelling daylight availability and irradiance components from direct and global irradiance. Sol Energy 44:271–289
Zain-Ahmed A, Sopian K, Abidin ZZ, Othman MYH (2002) The availability of daylight from tropical skies—a case study of Malaysia. Renew Energy 25:21–30
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2014 The Author(s)
About this chapter
Cite this chapter
Dayou, J., Chang, J.H.W., Sentian, J. (2014). Near-Sea-Level Langley Calibration Algorithm. In: Ground-Based Aerosol Optical Depth Measurement Using Sunphotometers. SpringerBriefs in Applied Sciences and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-287-101-5_3
Download citation
DOI: https://doi.org/10.1007/978-981-287-101-5_3
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-287-100-8
Online ISBN: 978-981-287-101-5
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)