Dataset: ETNP 2018-2019 suspended POM concentrations and isotopes
Deployment: RR1805

Samples were obtained from the Eastern Tropical North Pacific on two cruises. The R/V Revelle cruise RR1805 sampled two stations in April 2018: St P2 (16.9ºN 107ºW) and St P1 (20.3 ºN 106.1ºW).  The R/V Kilo Moana cruise KM1920 sampled two stations in October 2019: St P2 (16.9ºN 107ºW) and St P3 (21.8°N  109.9°W).

For depth profiles of bulk suspended particulate organic C and N analyses, 4 L or 10 L (for samples from >300 m) of water was obtained from 12 L Niskin bottles on a CTD rosette, using the spigot of the bottle. Exact volumes were recorded. Water was vacuum filtered onto pre-combusted (400°C), 25 mm diameter, GF/F filters and then frozen. Within a year from collection, samples were wafted with HCl overnight to remove carbonate, dried at 40°C, packed into nested silver and tin 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.