Solar radiation has been measured in the high Andes near Laguna Lejia (latitude 23° 26′ 23.30" S, longitude 67° 38′ 14.29" W) at an elevation of 4715 m between December 2016 and December 2017. Irradiances were monitored in four wavelength channels: PAR (400–700 nm), UV‐A (315–400 nm), UV‐B (295–315 nm) and short‐wavelength UV‐B (295–310 nm) with a new radiometer. In addition, ambient temperatures were recorded. Record values have been found for PAR (exceeding 600 W m−2), UV‐A (close to 95 W m−2), UV‐B (3.13 W m−2) and short‐wavelength UV‐B (0.144 W m−2) during Austral spring. The winter irradiance values slightly exceeded 50% of these values. Maximal cloud effects due to multiple reflections were 45, 38, 32 and 35% higher than values under cloudless skies for PAR, UV‐A, UV‐B and short‐wavelength UV‐B, respectively. Record irradiance for this site shows a UV index reaching and exceeding 20, which is due to low solar zenith angles, the altitude, low water vapor and aerosol concentrations in the atmosphere as well as low total column ozone concentrations.

中文翻译：

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监测高安第斯山脉的太阳辐照度

2016 年 12 月至 2017 年 12 月期间，在乐嘉湖附近的高安第斯山脉（南纬 23° 26' 23.30"，西经 67° 38' 14.29"）海拔 4715 m 处测量了太阳辐射。监测了四种波长的辐照度通道：PAR (400–700 nm)、UV-A (315–400 nm)、UV-B (295–315 nm) 和短波 UV-B (295–310 nm) 与新的辐射计。此外，记录环境温度。已发现 PAR（超过 600 W m-2）、UV-A（接近 95 W m-2）、UV-B（3.13 W m-2）和短波 UV-B（0.144 W m-2）的记录值−2) 在南方春天期间。冬季辐照度值略超过这些值的 50%。PAR、​​UV-A、UV-B 和短波 UV-B 的多次反射造成的最大云效应分别比无云天空下的值高 45%、38%、32% 和 35%。