The signatures of dust storms over the eastern North Atlantic were analyzed during the 2015 Aerosol Ocean Science Expedition (AEROSE) campaign conducted onboard the NOAA Ronald H. Brown. Dust signatures were identified using a combination of chemical and infrared (IR) spectral analysis. Mineralogical components were deduced by multivariate data analysis of metal concentrations using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) on dust filters that collected based on particle size. The ship-based Marine Atmospheric Emitted Radiance Interferometer (M-AERI) enabled IR analysis of the suspended mineral dust particulate. The USGS spectral library was used as a consolidation tool for the spectral and chemical datasets. Iron enrichment was a pivotal observation when contrasting various dust air masses sampled during the 2015 AEROSE cruise. Through a combination of dust signature characterization techniques, a foundation for evaluating radiative forcing assessments of dust on North Atlantic heat budgets may be established.