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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 8, No. 2, 2011, pp. 373-380
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Bioline Code: st11034
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 8, No. 2, 2011, pp. 373-380
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Accuracy assessment of moderate resolution image spectroradiometer products for dust storms in semiarid environment
Amnollahi, J.; Kaboodvandpour, S.; Abdullah, A.M. & Ramli, M. F.
Abstract
Dust storms are strongly and negatively associated with the annual cycle of rainfall and coincide with
the west and southwesterly winds in west and south west of Iran. Accuracy assessment of particulate matter
products of moderate resolution image spectroradiometer was studied in this research. Moderate resolution image
spectroradiometer products consist of aerosol optical thickness, its corresponding image red, green and blue and
moderate resolution image spectroradiometer/ terra calibrated radiances 5 minutes L1B swath 1 km, which shows the
environmental information at terrestrial, atmospheric and ocean phenomenology. Daily aerosol optical thickness
data retrieved from moderate resolution image spectroradiometer from May 2009 to May 2010 were compared with
the amount of particulate matter measured at ground in Sanandaj, Iran, using non-linear correlation coefficient.
Results showed that the moderate resolution image spectroradiometer image / terra calibrated radiances 5 minutes
L1B swath 1 km is able to detect dust storms distribution and their blowing direction over study area clearly. The air
quality conditions obtained in with dust storm period were unhealthy and correlation coefficients between moderate
resolution image spectroradiometer aerosol optical thickness and particulate matter concentration in this period were
higher than without dust storm period. The moderate resolution image spectroradiometer aerosol optical thickness
values lower than 0.1 were acquired uncertainty level. Comparison of moderate resolution image spectroradiometer
images/ terra calibrated radiances 5 minutes L1B swath 1 km and image red, green and blue showed that moderate
resolution image spectroradiometer has limitation in retrieval of aerosol optical thickness from the dust storm with
high concentration of particulate matter. This study reveals that the algorithm which is applied to refine the aerosol
optical thickness is not able to recognize the amount of particulate matter in low and very high concentrations
sensitively. No study has previously been conducted to investigate the accuracy of the moderate resolution image
spectroradiometer particulate matter products.
Keywords
Aerosol optical thickness; Air quality; Particulate matter; Uncertainty level
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