Ultraviolet radiation (UV) plays a key role in the photochemistry in the atmosphere. UV has a detrimental impact on human health from direct exposure to sunlight and indirect effect by enhancing photochemical pollutants. Characterizing the levels of solar UV and its role in the production of photochemical pollutants is important to provide awareness of its negative health effects on the human population. Four years (2015–2018) of ultraviolet erythemal radiation (UVER) measurements for Santiago, Chile, were analyzed, and the potential impact of UVER on human health were assessed from both direct and indirect effects. High values of UVER occurred from spring to early autumn, with a maximum of 0.33 Wm⁻². Ultraviolet index (UVI) values ≥ 11 were observed in 17% of the days, while UVI ≥ 6 accounts for up to 50% of the days during the observation period. The population in the Metropolitan Region of Santiago (Central, Chile) is exposed to high levels of UVER, increasing the risk of severe sunburn and developing skin cancer. Tropospheric ozone had a positive correlation with ultraviolet erythemal radiation, indicating an increment of 27 ppbv in ozone concentration when UVER levels were above 0.10 Wm⁻² (UVI = 4). Incoming sunlight reaches the surface of Central, Chile, energetically enough to cause sunburn and increase the levels of tropospheric ozone from late spring to early autumn. This study provides useful information for public awareness and for adopting strategies to reduce the negative impacts on the human population from direct exposure to sunlight and its role in the production of photochemical pollutants.

紫外线（UV）在大气中的光化学中起着关键作用。紫外线直接暴露在阳光下会对人体健康产生不利影响，而紫外线会通过增强光化学污染物而产生间接影响。表征太阳紫外线的水平及其在光化学污染物产生中的作用对于使人们认识到其对人类健康的负面影响非常重要。分析了智利圣地亚哥的四年（2015-2018年）紫外线红斑辐射（UVER）测量结果，并从直接和间接影响评估了UVER对人类健康的潜在影响。从春季到秋季初，UVER值较高，最大值为0.33 Wm ^-2。在17％的时间内观察到紫外线指数（UVI）值≥11，而在观察期间UVI≥6则占多达50％。圣地亚哥首都大区（智利中部）的人口暴露于高水平的UVER，增加了严重晒伤和发展为皮肤癌的风险。对流层臭氧与紫外线红斑辐射呈正相关，表明当UVER水平高于0.10 Wm ^-2时，臭氧浓度增加27 ppbv（UVI = 4）。进入的阳光从能量上到达了智利中部的表面，足以引起晒伤并从春季末到秋季初增加对流层臭氧的含量。这项研究为提高公众意识和采取策略减少直接暴露于日光及其在光化学污染物产生中的作用对人类的负面影响提供了有用的信息。