AM 1 sunlight 

https://doi.org/10.1351/goldbook.A00313
Solar irradiance at sea level, i.e., traversing the atmosphere, when the direction of the sun is perpendicular to the surface of the earth. Also called terrestrial global irradiance.
See also: AM 0 sunlight
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 302 [Terms] [Paper]
Citation: 'AM 1 sunlight' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.A00313 RIS BibTex EndNote
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Last revised: February 24, 2014