Record solar UV irradiance in the tropical Andes

摘要: High elevation, thin ozone layer, and clear sky produce intense ultraviolet (UV) radiation in the tropical Andes. Recent models suggest that stratospheric will slightly decrease coming decades, potentially resulting more UV anomalies. Data collected between 4,300-5,916 m above sea level (asl) Bolivia show how this trend could dramatically impact surface solar irradiance. During 61 days, two Eldonet dosimeters recorded extreme UV-B irradiance equivalent to a index (UVI) of 43.3, which is highest ground value ever reported. If they become common, events magnitude may have societal ecological implications, make understanding process leading their generation critical. Our data event other major spikes were consistent with rising UV-B/UV-A ratios days hours preceding spikes, trajectories negative anomalies (NOAs), radiative transfer modeling.