A16N_2003_trace_metal_CTD

This dataset consists of water column measurements collected from a trace metal CTD during the CLIVAR/GO‑SHIP repeat hydrography section A16N from 4 June to 11 August 2003, a meridional transect in the North Atlantic from roughly 63°N to 3°S. Station metadata, hydrographic data, and cruise documentation are provided by the CLIVAR & Carbon Hydrographic Data Office (CCHDO) under expocode 33RO200306. 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, Fe, Ni, and Cu. 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, 2008a. A commercially available rosette system for trace metal-clean sampling, Limnol. Oceanogr. Methods, 6, 384-394.C.I. Measures, W.M. Landing, M.T. Brown, C.S. Buck, 2008b. High-resolution Al and Fe data from the Atlantic Ocean CLIVAR-CO2 Repeat Hydrography A16N transect: extensive linkages between atmospheric dust and upper ocean geochemistry, Glob. Biogeochem. Cycles, 22, GB1005.P.M. Barrett, J.A. Resing, N.J. Buck, C.S. Buck, W.M. Landing, C.I. Measures, 2012. The trace element composition of suspended particulate matter in the upper 1000 m of the eastern North Atlantic Ocean: A16N, Mar. Chem., 142–144, 41-53. We thank the captains and crews of R/V Ronald H. Brown and chief scientists John Bullister and Nicolas Gruber. This research was funded by NSF grants OCE-0223397 to Christopher I. Measures (University of Hawaii), OCE-0223378 to William M. Landing (Florida State University), and OCE-0649505 to Joseph A. Resing (University of Washington and NOAA-PMEL).