Oceanography | Vol. 37, No. 2
238U
234Th
234U
230Th
Dust/
Minerals
232Th
228Th
224Ra
Porewater
Release
232Th
228Ra
234Pa
228Ra
228Th
228Ac
Sinking Particle
Removal
Sinking Particle
Removal
Sinking Particle
Removal
24 days
76 kyr
1.8 yr
4.5 Gyr
250 kyr
1.2 min
14 Gyr
6.2 hrs
5.8 yr
3.7 days
1.8 yr
14 Gyr
5.8 yr
156
AAIW
NADW
AABW
131 Novel Insights into Ocean Trace Element Cycling from
Biogeochemical Models
By A. Tagliabue and T. Weber
142 New Insights into the Organic Complexation of Bioactive Trace Metals
in the Global Ocean from the GEOTRACES Era
By H. Whitby, J. Park, Y. Shaked, R.M. Boiteau, K.N. Buck, and R.M. Bundy
156 PERSPECTIVE. Timekeepers for Trace Elements in the Global Ocean:
The Thorium Stopwatches
By C.T. Hayes
162 PERSPECTIVE. The Dawn of the BioGeoSCAPES Program: Ocean
Metabolism and Nutrient Cycles on a Changing Planet
By M.A. Saito, H. Alexander, H.M. Benway, P.W. Boyd, M. Gledhill, E.B. Kujawinski,
N.M. Levine, M. Maheigan, A. Marchetti, I. Obernosterer, A.E. Santoro, D. Shi, K.Suzuki,
A. Tagliabue, B.S. Twining, and M.T. Maldonado
DEPARTMENTS
5 QUARTERDECK. A Needle in the Haystack
By C. Benitez-Nelson
167 DIY OCEANOGRAPHY. The OpenCTD: A Low-Cost, Open-Source CTD for
Collecting Baseline Oceanographic Data in Coastal Waters
By A. Thaler, S.K. Sturdivant, R.Y. Neches, and J.J. Levenson
174 DIY OCEANOGRAPHY. Design Update to “The Pressure of In-Situ Gases
Instrument (PIGI) for Autonomous Shipboard Measurement of Dissolved O2
and N2 in Surface Ocean Waters”
By B. Lowin, R. Izett, E. Taylor, C. Robertson, and S. Rivero-Calle
180 TRIBUTE. A Tribute to Richard W. Eppley
Compiled and edited by P.G. Falkowski
186 THE OCEANOGRAPHY CLASSROOM. Interviews!
By S. Boxall
188 FROM THE TOS JEDI COMMITTEE. In Pursuit of Conference Equity
By I.M. Martínez-Farrington, L. Martell Bonet, A. Alemán-Díaz, H.J. Ballenger, D. Ebanks,
M. Behl, S. Kolesar, S. Cooper, C. Garza, J.C. Lewis, M.B. Jones, and L. White
190 CAREER PROFILES. Trisha Bergmann, International Affairs Specialist, NOAA
National Ocean Service | Meredith Jennings, Senior Research Associate,
Houston Advanced Research Center
ON THE COVER
Deployment of the "trace metal clean" rosette
at 78°N from USCGC Healy as part of the 2015
US GEOTRACES GN01 cruise to the Arctic
Ocean. Water from this cast yielded data for
key biogeochemical parameters such as iron,
aluminum, radium, metal isotopes, and major
nutrients. Photo credit: Katlin Bowman Adamczyk,
US Geological Survey
SPECIAL ISSUE SPONSOR
Support for production of this special issue was
provided by the US National Science Foundation,
award OCE-2219888 to Robert Anderson.
SPECIAL ISSUE GUEST EDITORS
Tim Conway, University of South Florida
Jessica Fitzsimmons, Texas A&M University
Rob Middag, Royal NIOZ
Taryn Noble, University of Tasmania
Hélène Planquette, University of Brest
180
131
IN
PROGRESS
TWENTY YEARS OF GEOTRACES
AN INTERNATIONAL STUDY OF THE MARINE BIOGEOCHEMICAL
CYCLES OF TRACE ELEMENTS AND ISOTOPES
Oceanography
THE OFFICIAL MAGAZINE OF THE OCEANOGRAPHY SOCIETY
VOL. 37, NO. 2, JUNE 2024
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Oceanography | Vol. 37, No. 2