Associate Professor of Climatology, Department of Geography, Zanjan University
Abstract
Clouds are one of the most important components of the climate system of any region, which have an important effect on the regulation and balance of radiant energy and the water cycle, so it is necessary to study their long-term changes. Based on this, in this study, using the data of the cloudiness coefficient of 26 synoptic meteorological stations in the northwestern region of Iran in the time period of 1982-2022, the analysis of the trend of cloudiness changes was carried out based on the Sen's slope estimation method. Also, by using the average annual cloud cover images of EUMETSAT satellite in the period of 1982-2022 and by using the Getis-Ord Gi* spatial statistics index, the spatial changes of cloudiness in the last four decades were analyzed. The results of the monthly trend analysis showed that except for July, which had an increasing trend, the rest of the months had a significant downward trend. The months of June, August and September also had no significant trends. The results of the spatial analysis also showed that the amount of cloudiness in this region has decreased in all four decades and the pattern of changes has also changed from the first decade to the recent decades.
Mirmousavi,S H . (2024). Evaluation and analysis of changes in cloud cover in the northwest region of Iran during the last four decades. (e714757). Climate Change and Climate Disaster, 3(5), e714757
MLA
Mirmousavi,S H . "Evaluation and analysis of changes in cloud cover in the northwest region of Iran during the last four decades" .e714757 , Climate Change and Climate Disaster, 3, 5, 2024, e714757.
HARVARD
Mirmousavi S H. (2024). 'Evaluation and analysis of changes in cloud cover in the northwest region of Iran during the last four decades', Climate Change and Climate Disaster, 3(5), e714757.
CHICAGO
S H Mirmousavi, "Evaluation and analysis of changes in cloud cover in the northwest region of Iran during the last four decades," Climate Change and Climate Disaster, 3 5 (2024): e714757,
VANCOUVER
Mirmousavi S H. Evaluation and analysis of changes in cloud cover in the northwest region of Iran during the last four decades. CCCD. 2024;3(5):e714757 (In Persian).