Iron uptake rates from Hawaii Ocean Time-series (HOT) cruises on R/V Kilo Moana at Station ALOHA in the North Pacific Subtropical Gyre from May 2021 to September 2023

Iron (Fe) uptake rates were measured on Hawaii Ocean Time-series (HOT) cruises between May 2021 and September 2023. All samples were collected at Station ALOHA using a trace metal rosette. Fe uptake incubations were performed using seawater from the surface mixed layer (25 meters) following a low-level 57Fe-58Fe isotope double spike technique. Particulate and dissolved samples at the end of the 24-hour uptake experiment were analyzed by multi-collector inductively coupled plasma mass spectrometry at the University of Southern California using a Thermo Scientific Neptune mass spectrometer. This dataset is part of a larger study focused on the cycling of trace metals in the North Pacific Subtropical Gyre, and is embedded within the HOT program.