Dissolved and total organic carbon concentrations of seawater collected in the northwestern Atlantic in 2024 during three cruises aboard the Atlantic Explorer (AE2412, AE2426b, AE2427)

Data on the concentration of dissolved organic carbon and total organic carbon provide the environmental context for us to understand the role that extracellular vesicles play in marine organic carbon cycling. These data are from discrete seawater samples collected from Niskin bottles or from the underway systems during three cruises (AE2412, AE2426b, AE2427) conducted in 2024. All cruises were in the northwestern Atlantic Ocean. Seawater was whole seawater for total organic carbon or 0.2 uM-filtered seawater for dissolved organic carbon. Samples were analyzed by high temperature combustion. The samples were collected and processed by Krista Longnecker of Woods Hole Oceanographic Institution.