CLEAR DAY SOLAR ULTRAVIOLET SPECTRAL OBSERVATION OF MOUNT EVEREST IN TIBET

Wang Mengmeng; Tsoja Wangmo; Sheng Min; Lagba Tunzhup; Zhou Yi; Norsang Gelsor

doi:10.19912/j.0254-0096.tynxb.2023-2015

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (4) : 381-386. DOI: 10.19912/j.0254-0096.tynxb.2023-2015

CLEAR DAY SOLAR ULTRAVIOLET SPECTRAL OBSERVATION OF MOUNT EVEREST IN TIBET

Wang Mengmeng, Tsoja Wangmo, Sheng Min, Lagba Tunzhup, Zhou Yi, Norsang Gelsor

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Abstract

Mount Everest in Tibet is one of the regions with the strongest solar ultraviolet radiation in the world. The solar ultraviolet spectrum was observed for one and a half years in the Mount Everest region of Tibet with a high-precision spectrometer. It is found through the observation that on clear days near the winter solstice of Mount Everest, the local noon solar ultraviolet radiation has an integral value of 40.4916W/m² for wavelength, while on clear days near the summer solstice, the integral value reaches 67.5847W/m²; The characteristics of the solar ultraviolet spectrum on clear days near the spring and autumn equinoxes are basically similar, with a total amount of 56.3004 W/m² and 58.4680 W/m² at noon, respectively. It is found that the intensity of the solar ultraviolet spectrum in the Everest region increases with the increase of the solar altitude angle, and the rate of increase gradually decreases. A comparative study was conducted using AM1.5 and AM0 standard solar spectra with the UV spectra of Mount Everest and Anhui Winter Solstice. The local noon solar UV integral value of Anhui Winter Solstice only accounts for 60.66% of Mount Everest; Qualitatively studied the main factors affecting the ground solar ultraviolet spectrum of Mount Everest.

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Mount Everest / nigh altitude / clear day / solar ultraviolet spectrum / observation

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Wang Mengmeng, Tsoja Wangmo, Sheng Min, Lagba Tunzhup, Zhou Yi, Norsang Gelsor. CLEAR DAY SOLAR ULTRAVIOLET SPECTRAL OBSERVATION OF MOUNT EVEREST IN TIBET[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 381-386 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2015

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