Dataset: m/z and peak intensity data for the molecular formulas assigned to aerosol water soluble organic matter samples run by ESI FTICR MS from R/V Knorr GEOTRACES cruises KN199-04 and KN204-01 in the Subtropical northern Atlantic Ocean in 2010 and 2011

The sampling details and identities are provided for each of the sample along with the FTICR MS (Fourier transform ion cyclotron resonance mass spectrometry) data for each sample. This includes: the starting and ending locations (latitudes and longitudes) and times (Greenwich mean time) as well as the sampling rates (m3 min-1) and calculated sample volumes (m3) for each of the aerosol samples. The run times (measured in hours) and sample volumes account for periods when the sampler was stopped due to potential contamination from the ship’s stack. The FTICR MS data include: molecular formulas assigned to peaks at various m/z in Fourier Transform ion cyclotron resonance mass spectra. The formulas consist of carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus. The ‘m/z’ and ‘intensity’ columns are generated by the Bruker software, and the molecular formula and exact mass data are generated by the investigators' molecular formula assignment protocol described in the next section.