P02_2004_trace_metal_CTD

This dataset consists of water column measurements collected from a trace metal CTD during the CLIVAR/GO‑SHIP repeat hydrography section P02 from 15 June to 27 August 2004, a zonal transect in the North Pacific from roughly 134°E to 121°W. Station metadata, hydrographic data, and cruise documentation are provided by the CLIVAR & Carbon Hydrographic Data Office (CCHDO) under expocode 318M200406. A trace-metal clean rosette was used to collect seawater from the upper 1000 m of the water column and then subsampled in a clean van for salinity, nutrients, and dissolved and particulate trace metal samples. Filtered (<0.4 µm) samples were collected for shipboard analysis by flow injection methods for dissolved Fe and Al concentrations. Total suspended matter samples were collected onto 0.4 µm filters and analyzed by ED-XRF at NOAA-PMEL for particulate Al, Si, P, Ca, Mn, and Fe. The timestamp is in UTC. For a full description of sampling protocols and analytical methods see: J.A. Resing, C.I. Measures, 1994. Fluorometric determination of Al in seawater by flow injection analysis with in-line preconcentration, Anal. Chem., 66, 4105-4111.C.I. Measures, J. Yuan, J.A. Resing, 1995. Determination of iron in seawater by flow injection analysis using in-line preconcentration and spectrophotometric detection, Limnol. Oceanogr. Methods, 50, 3-12.C.I. Measures, W.M. Landing, M.T. Brownand, C.S. Buck, 2008. A commercially available rosette system for trace metal-clean sampling, Limnol. Oceanogr. Methods, 6, 384-394.Buck NJ, Barrett PM, Morton PL, Resing JA, Landing WM. 2021. Energy dispersive X-ray fluorescence methodology and analysis of suspended particulate matter in seawater for trace element compositions and an intercomparison with high-resolution inductively coupled plasma-mass spectrometry. Limnol. Oceanogr. Methods, 19, 401–415. We thank the captains and crews of R/V Melville and chief scientists Paul E. Robbins and James Swift. This research was funded by NSF grants OCE-0223378 to William M. Landing (Florida State University), and OCE-0649505 and OCE-0223504 to Joseph A. Resing (University of Washington and NOAA-PMEL).