Dataset: Suspended Organic Particle concentration and stable C and N isotopes (collected with McClane Pumps and GF/F filters) from the Eastern Tropical North Pacific on the R/V Thompson cruise TN278 in April 2012

 Suspended organic carbon and nitrogen concentrations and stable isotopes were obtained on the R/V Thompson cruise TN278 at St P2 (16.53 N 107.15 W; known as BB2 on this cruise) and at St P1 (20.1 N 106.0 W; known as BB1 on this cruise) in the Eastern Tropical North Pacific Oxygen Deficient Zone in April 2012. Water was filtered onto 142 mm pre-combusted GF/F filters in situ using McClane pumps (on average ~300-500 L) in a depth profile. Two 21 mm diameter punches from a size 12 core bore punch were obtained from each 142 mm filter and used for organic matter analysis. Sample punches were wafted with HCl overnight to remove carbonate, dried at 40°C, packed into silver capsules, and sent to the UC Davis Stable Isotope Facility (Davis, CA) for C and N analysis utilizing an elemental analyzer (Elementar Vario EL Cube) attached to an isotope ratio mass spectrometer (Isoprim VisION). Blank combusted GF/F filters were included in analyses and did not show measurable material.