Monitoring Summer Solar Ultraviolet (UV) Radiation on the Ground Level Over Ardabil-Sarein, NW Iran

Contribution to Journal

Jahdi, R. and Arabi, M.. 2023. "Monitoring Summer Solar Ultraviolet (UV) Radiation on the Ground Level Over Ardabil-Sarein, NW Iran." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 10 (4/W1-2022), pp. 327-333. https://doi.org/10.5194/isprs-annals-X-4-W1-2022-327-2023
Article Title

Monitoring Summer Solar Ultraviolet (UV) Radiation on the Ground Level Over Ardabil-Sarein, NW Iran

ERA Journal ID213033
AuthorsJahdi, R. and Arabi, M.
Journal TitleISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Journal Citation10 (4/W1-2022), pp. 327-333
Number of Pages7
Year2023
PublisherCopernicus GmbH
Place of PublicationGermany
ISSN2194-9042
2194-9050
2196-6346
Digital Object Identifier (DOI)https://doi.org/10.5194/isprs-annals-X-4-W1-2022-327-2023
Web Address (URL)https://isprs-annals.copernicus.org/articles/X-4-W1-2022/327/2023/
AbstractThe UV radiation level at the Earth's surface is generally affected by several factors such as time, geographic location, and climate. The first observations of solar UV radiation ever made in NW Iran, obtained in June 2019 are reported in this work. The analysis of hourly values of UV irradiances measured in the study area reveals significant diurnal variation during daylight hours, with lower values in the morning and afternoon and higher around noon. Mean hourly UV (A+B) ranged from 2755 to 10434 ?W/cm2 with an average value being about 7960 ?W/cm2. Mean hourly UV (C) ranged from 40 to 91 ?W/cm2 with an average value being about 76 ?W/cm2. The results of a short but intense measurement campaign in Ardabil-Sarein indicate the trends for geographical latitude, longitude, and altitude from surface UV measurements. The UV intensity is associated with geographical longitude (r2= 0.15 for UV (A+B); r2= 0.13 for UV (C)). Furthermore, UV intensity varies with the local latitude in the study area. There is a strong linear relationship between average UV and altitude and a trend of rising UV with increasing altitude is obtained. A decrease in UV radiation with increasing solar zenith (°) was observed. However, the correlation between UV radiation and solar azimuth (°) was not significant. Understanding the factors influencing near-surface UV radiation through systematic ground-based UV will help determine whether long-term changes occur as a result of changes in cloud cover or climate change, and how specific it means to identifying the causes.
KeywordsEarth's Surface; Solar UV Radiation; Temporal; Geographical Location; Solar Zenith Angle
Byline AffiliationsUniversity of Mohaghegh Ardabili, Iran
Shahid Rajaee Teacher Training University, Iran
University of Southern Queensland
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