RV Investigator Voyage IN2018_V04 Hydrology Data

This record describes Hydrology (HYD) data collected from the Marine National Facility (MNF) RV Investigator voyage IN2018_V04, titled: "Constraining external iron inputs and cycling in the southern extension of the East Australian Current." The voyage took place between September 11 and October 8, 2018, departing Hobart (TAS) and returning to Hobart.

The primary objective of the voyage was to characterize the sources and biogeochemical cycling of iron and associated nutrients and their impact on productivity southwest, southeast and northeast of Tasmania. Hydrochemistry analysed salinity, oxygen and nutrient samples collected from the conductivity temperature depth (CTD) rosette, trace metal rosette (TMR), underway (UWY) seawater supply and experiments (EXP) conducted on board. Underway nitrate plus nitrite (NOx) and phosphate was analysed continuously using the AA100 nutrient analyser while transiting between stations. The AA100 was connected to the underway seawater supply surface water (7 m) in the underway lab. Please refer to the separate report for the data processing of the AA100 data. Five nutrients were analysed; silicate, phosphate, nitrate + nitrite, nitrite and ammonium. Certified reference materials for nutrients in seawater were analysed within each analytical run. The reference materials were within GO-SHIP specified limits.

This dataset has been archived at the CSIRO O&A Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset is contained in the Voyage Report and Data Processing Report.