In this study we compile and present results from the factor analysis of 43 Aerosol Mass Spectrometer (AMS) datasets (27 of the datasets are reanalyzed in this work). The components from all sites. when taken together. provide a holistic overview of Northern Hemisphere organic aerosol (OA) and its evolution in the atmosphere. https://www.markymarkscott.com/product-category/the-demi-silver/