CTD Niskin bottle data from research cruises FKt230602 and FKt231202 on R/V Falkor (too) in the Central Eastern Pacific Ocean, offshore Costa Rica from June to December 2023

This dataset includes water sample data collected using a CTD Niskin Rosette during two Octopus Odyssey expeditions aboard R/V Falkor (too) in June and December 2023. The dataset covers sampling events at Dorado Outcrop and Pampa Submarina, a hydrothermally active area off Costa Rica's Pacific margin. The dataset includes parameters such as sample type, cruise number, station number, cast number, depth, sample code, temperature, salinity, and oxygen concentrations, along with associated observational notes. The data were collected using a CTD rosette with 24 Niskin bottles, which were descended to various depths to assess hydrographic conditions in the region, contributing to a better understanding of hydrography, ecology, and water column dynamics. The research was conducted by an international team in collaboration with Costa Rican institutions, and the dataset is instrumental in oceanographic studies related to seamount ecosystems and fluid circulation.