Estimation of Cloudiness in the Atmosphere of Iran Using Multi-Angle Imaging SpectroRadiometer (MISR)

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Raispour K.; RAZMI R.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2020 | Volume:16 | Issue:3 Page(s): 257-271

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Information Journal Paper

Title

Estimation of Cloudiness in the Atmosphere of Iran Using Multi-Angle Imaging SpectroRadiometer (MISR)

Author(s)

Raispour K. | RAZMI R. | Issue Writer Certificate

Keywords

Cloud FractionQ1

MISR SensorQ1

Temporal and Spatial DistributionQ1

Atmosphere of IranQ1

Abstract

Cloudiness is of particular importance among other climatic elements and is one of the important issues in predicting climate change on a global and regional scale. The purpose of this study is to investigate the spatial distribution and estimate the long-term average of cloudiness on a seasonal and monthly time scale in the geographical area of Iran's atmosphere. Therefore, Multi-angle Imaging SpectroRadiometer (MISR) products were used during the years 2001-2019. The cloud products used were extracted with monthly temporal resolution and spatial resolution of 0. 5° x 0. 5° and after quality control and preprocessing, were used to build network layers. Cloud cover data from 44 synoptic meteorological stations were used to verify the accuracy of the cloud data of the MISR Sensor. Based on the results, the average percentage of cloudiness in Iran's atmosphere is about 25%, which is low compared to the global average cloudiness (50%). In the long-term study, the maximum cloudiness was estimated on the southern and western coasts of the Caspian Sea and the highlands of Azerbaijan, Zagros and Khorasan ranked next. On the other hand, the lowest amount of cloudiness was observed in a wide area of central, eastern and southeastern Iran. Among the seasons, the highest and the lowest Cloud Fraction was estimated in winter and in summer, respectively. On a monthly time scale, it was found that the highest/lowest amount of Cloud Fraction is related to February/September. These differences indicate changes in the weather during different months of the year. Also the decreasing trend of Cloud Fraction during the study period is important in terms of global warming and climate change.

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APA: Copy

Raispour, K., & RAZMI, R.. (2020). Estimation of Cloudiness in the Atmosphere of Iran Using Multi-Angle Imaging SpectroRadiometer (MISR). IRAN-WATER RESOURCES RESEARCH, 16(3 ), 257-271. SID. https://sid.ir/paper/401464/en

Vancouver: Copy

Raispour K., RAZMI R.. Estimation of Cloudiness in the Atmosphere of Iran Using Multi-Angle Imaging SpectroRadiometer (MISR). IRAN-WATER RESOURCES RESEARCH[Internet]. 2020;16(3 ):257-271. Available from: https://sid.ir/paper/401464/en

IEEE: Copy

K. Raispour, and R. RAZMI, “Estimation of Cloudiness in the Atmosphere of Iran Using Multi-Angle Imaging SpectroRadiometer (MISR),” IRAN-WATER RESOURCES RESEARCH, vol. 16, no. 3 , pp. 257–271, 2020, [Online]. Available: https://sid.ir/paper/401464/en

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