CT008
Revealing Biogeochemical Processes on Basin Scales through Ocean Transects

Session ID#: 84582

Session Description:
Biogeochemical processes that affect the cycling of trace elements and their isotopes, as well as carbon, macronutrients and other constituents, are studied using two basic field strategies: sampling at a fixed station or regime to measure rates and examine specific processes, or transects on up to basin scales. Each has its strengths and weaknesses, but transects can gather a broad sweep of information on a relatively short time scale that can then be used to develop a more specific process-oriented approach. Indeed, the GEOSECS program of the 1970’s used the transect approach, and currently the GO-SHIP/Repeat Hydrography and international GEOTRACES programs feature long ocean transects. This session will highlight biogeochemical processes revealed on basin transects that affect trace constituents such as trace elements and isotopes, as well as organic constituents, including carbon and macronutrients. It will also focus on sampling and data analysis methods applied to sampling across basins, and biogeochemical modeling studies that integrate data from long transects into their analyses.
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: CHEMICAL]
4860 Radioactivity and radioisotopes [OCEANOGRAPHY: CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: CHEMICAL]

Primary Chair:  Gregory A Cutter, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States
Co-chairs:  Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, Karen L Casciotti, Stanford University, Earth System Science, Stanford, United States and Rob Middag, NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, OCS, Den Burg, Netherlands
Primary Liaison:  Gregory A Cutter, Old Dominion University, Norfolk, VA, United States
 
Quantifying Atmospheric Trace Element Deposition on a Global Scale with GEOTRACES Transect Data (637044)
David C Kadko, Florida International University, Applied Research Center, Miami, FL, United States, William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Cliff Buck, University of Georgia, Athens, GA, United States and Christopher M Marsay, Skidaway Institute of Oceanography, Savannah, GA, United States
 
Using an Ocean Model to Examine the Role of Different Iron Sources and Internal Cycling in Controlling the Distribution of Iron and Iron Isotopes in the Global Ocean (638347)
Daniela Koenig and Alessandro Tagliabue, University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
 
Re-analysis of Bioactive Trace Element Atmospheric Deposition along the P16 CLIVAR Line (639343)
William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Clifton S Buck, Skidaway Institute of Oceanography, Savannah, GA, United States, David C Kadko, Florida International University, Applied Research Center, Miami, FL, United States and Angela Milne, University of Plymouth, Plymouth, United Kingdom
 
The Distribution of Size-Fractionated Particulate Organic Carbon Concentrations along a Meridional Transect in the Pacific (639437)
Phoebe J Lam1, Nick Carracino2, Sophie Rojas2 and James K B Bishop3, (1)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (2)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (3)UC, Berkeley, Berkeley, CA, United States
 
Contrasting complexation of Cu and Co by organic ligands in the East China Sea determined by forward and reverse titration CLE-AdCSV (640166)
Kuo Hong Wong, Jiarui Xu, Ronald Muhammad and Hajime Obata, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
 
The Influence of Water Mass Mixing and Particle Dissolution on the Silicon Cycle in the Central Arctic Ocean (640177)
Claudia Ehlert1, Bianca T. P. Liguori1 and Katharina Pahnke2, (1)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (2)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Germany
 
Nd isotopic composition and REE concentrations in the Bering Sea and the North Pacific (641199)
Hajime Obata, The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, Takuya Hara, The University of Tokyo, Kashiwa, Japan and Hirofumi Tazoe, Hirosaki University, Aomori, Japan
 
Dissolved bio-essential metals in the Lazarev and Weddell Sea (641714)
Rob Middag1, Erin Marie Bertrand2, Corina P.D. Brussaard3, Indah Ardiningsih1, Charlotte U.M. Eich4, Loes JA Gerringa1, Mathijs H. van Manen1, Sven B.E.H. Pont4, Gert-Jan Reichart5,6 and Hung-An Tian1, (1)NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, OCS, Den Burg, Netherlands, (2)Dalhousie University, Department of Biology, Halifax, NS, Canada, (3)NIOZ Royal Netherlands Institute for Sea Research, MMB, Den Burg, Netherlands, (4)NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University, MMB, Den Burg, Netherlands, (5)Royal Netherlands Institute for Sea Research, Den Burg, Netherlands, (6)Utrecht University, Utrecht, Netherlands
 
Distribution of dissolved Ni, Cu, and Zn and their isotopes in the Southern Ocean and the South Pacific Ocean (642602)
Shotaro Takano, Kyoto University, Institute for Chemical Research, Kyoto, Japan and Yoshiki Sohrin, Kyoto University, Kyoto, Japan
 
Biogeochemical Dynamics of Particulate Trace Metals in the South-East Atlantic along the GEOTRACES GA08 Section Cruise (642932)
Ali Al-Hashem1,2, Aaron J Beck1, Stephan Krisch3, Tim Steffens1 and Eric P. Achterberg2,3, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany, (2)University of Kiel, Kiel, Germany, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
 
Basin-scale variations of particulate organic matter stoichiometry in the global ocean (643031)
Yang Xiang and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
 
Dissolved Organic Phosphorus (DOP) Distributions in the Eastern Indian Ocean and Subtropical South Pacific Ocean (643549)
Zhou Liang, Florida State University, department of earth, ocean & atmospheric science, Tallahassee, FL, United States, Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, NH, United States, Kelly McCabe, University of South Carolina, School of the Earth, Ocean, and Environment, Columbia, SC, United States, Dario Marconi, Princeton University, Department of Geosciences, Princeton, NJ, United States, Daniel Mikhail Sigman, Princeton University, Princeton, NJ, United States and Angela N Knapp, Florida State University, Tallahassee, FL, United States
 
Insights into carbon export and remineralization fluxes using 234Th distribution along the GEOTRACES Pacific Meridional transect (643562)
Jennifer An Kenyon1, Ken Buesseler2, Phoebe J Lam3, Steven M Pike1, Nick Carracino4 and Sophie Rojas4, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, (3)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (4)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States
 
Dissolved Al during GEOTRACES Pacific Meridional Transect in the North Pacific Ocean (644600)
Mariko Hatta, Chris I Measures and Gabrielle A Weiss, University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States
 
Controls of Copper in the Ocean (644605)
Saeed Roshan, University of California Santa Barbara, Santa Barbara, CA, United States, Timothy DeVries, University of California, Santa Barabara, Earth Research Institute and Department of Geography, Santa Barabara, United States and Jingfeng Wu, Univ of Miami, Miami, FL, United States
 
Constraining the oceanic hydrothermal iron flux using iron isotopes (645768)
Alastair J.M. Lough1, Wenhao Wang2, Rachael Helen James3, Maeve C Lohan1 and Alessandro Tagliabue4, (1)University of Southampton, Ocean and Earth Sciences, National Oceanography Centre, Southampton, United Kingdom, (2)University of Southampton, Southampton, United Kingdom, (3)Univesity of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom, (4)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
 
Decadal changes of anthropogenic and total carbon in the Atlantic Ocean (646356)
Reiner Steinfeldt1, Monika Rhein2 and Dagmar Kieke1, (1)University of Bremen, Bremen, Germany, (2)Univ Bremen, FB1, Bremen, Germany
 
To the North Pole and Back: A Pan-Arctic Barium Synthesis (647851)
Laura M Whitmore1, Tristan J Horner2, Robert Rember3, Yang Xiang4, Phoebe J Lam4, Frank Dehairs5, Helmuth Thomas6, Alan M Shiller7 and Chantal Mears8, (1)Organization Not Listed, Washington, DC, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (3)University of Alaska Fairbanks, Fairbanks, AK, United States, (4)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (5)Vrije Universiteit Brussel, Analytical, Environmental and Geo-Chemistry, Ixelles, Belgium, (6)Dalhousie University, Halifax, NS, Canada, (7)University of Southern Mississippi, Marine Science, Stennis Space Center, MS, United States, (8)Helmholtz Center Geesthacht, Germany
 
Lead concentration and isotopic compositions in the central Pacific basin: GEOTRACES PMT (GP15) (647925)
Edward A Boyle, Massachusetts Institute of Technology, Earth Atmospheric and Planetary Sciences, Cambridge, MA, United States and Shuo Jiang, East China Normal University, State Key Laboratory for Estuarine and Coastal Marine Research, Shanghai, China
 
The distribution of Ni and Ni isotopes in the North Pacific (648051)
Xiaopeng Bian1, Shun-Chung Yang1, Tim M Conway2 and Seth John1, (1)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (2)University of South Florida, College of Marine Science and School of Geosciences, St. Petersburg, FL, United States
 
Large scale patterns and size distributions of marine particles across the African and Pacific Sectors of the Southern Ocean (648364)
Stephanie O'Daly1, Brita Kathryn Irving1, Rachel Marie Lekanoff2, Jessica Pretty3 and Andrew M. P. McDonnell2, (1)University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States, (2)University of Alaska Fairbanks, Fairbanks, AK, United States, (3)University of Alaska Fairbanks, School of Fisheries and Ocean Sciences, Fairbanks, AK, United States
 
On using Si to unravel potential sources of dissolved Al to the deep Arctic (648449)
Chris I Measures and Mariko Hatta, University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States
 
The Distribution of Particulate Trace Elements along a Meridional Transact in the Pacific (648455)
Jong-Mi Lee1, Phoebe J Lam2 and Allison Laubach1, (1)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (2)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
 
Copper concentrations and isotopic composition in the North Pacific (648587)
Shun-Chung Yang1, Xiaopeng Bian1, Tim M Conway2 and Seth John1, (1)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (2)University of South Florida, St. Petersburg, FL, United States
 
Inter-Basin Comparison of Boundary Scavenging Expressed in Dissolved and Particulate Thorium and Protactinium Along GEOTRACES GN01, GP16, and GA03 Transects (649228)
Sebastian M Vivancos1,2, Robert F Anderson1,2, Martin Q Fleisher1, Frank J Pavia1,2, Pu Zhang3,4, Xianglei Li3, Hai Cheng3,4, R. Lawrence Edwards3, Yang Xiang5 and Phoebe J Lam5, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (3)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States, (4)Xi'an Jiaotong University, Institute of Global Environmental Change, Xi'an, China, (5)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States
 
227Ac along the GEOTRACES Meridional Pacific Transect: Preliminary Results (649330)
Douglas E Hammond1, Nathaniel James Kemnitz2, Paul Henderson3, Emilie Le Roy3, Matthew A Charette3, Willard S Moore4, Robert F Anderson5 and Martin Q Fleisher5, (1)University of Southern California, Los Angeles, CA, United States, (2)University of Southern California, CA, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (4)University of South Carolina Columbia, Columbia, SC, United States, (5)Lamont-Doherty Earth Obs, Palisades, NY, United States
 
The distribution of dissolved molybdenum, vanadium and uranium in the Atlantic Ocean (649948)
Imelda Velasquez, Sandra Poehle and Andrea Koschinsky, Jacobs University Bremen, Department of Physics and Earth Sciences, Bremen, Germany
 
Development of a method for determination of dissolved Te species in open ocean water (650403)
Tohru Fukazawa1, Daichi Asanuma1, Hajime Obata2, Satoshi Usui3, Shiro Matsuoka3 and Kazuhiro Norisuye3, (1)Graduate School of Science & Technology Niigata University, Niigata, Japan, (2)Univ Tokyo, Kashiwa, Japan, (3)Niigata University, Niigata, Japan
 
Development of a method for determination of lead isotope ratios in marine suspended particles (650405)
Daichi Asanuma1, Hajime Obata2, Yuna Matsubara3, Kai Maruyama3, Kazuhiro Norisuye4 and Tohru Fukazawa1, (1)Graduate School of Science & Technology Niigata University, Niigata, Japan, (2)Univ Tokyo, Kashiwa, Japan, (3)Graduate School of Science & Technology Niigata University, Japan, (4)Niigata University, Niigata, Japan
 
Constraining iron sources and cycling during seasonal bloom development in the Australian sector of the Southern Ocean (650737)
Pamela M Barrett1, Robin Grün1, Robert F Strzepek2 and Michael Joseph Ellwood1, (1)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (2)University of Tasmania, Antarctic Gateway Partnership, Institute for Marine and Antarctic Studies (IMAS), Hobart, TAS, Australia
 
Controls of dissolved carbon fractions along a meridional transect through the South Pacific Ocean (650808)
Helena Osterholz1, David P.A. Kilgour2, Jutta Niggemann1 and Thorsten Dittmar3, (1)University of Oldenburg, ICBM-MPI Bridging Group for Marine Geochemistry, Oldenburg, Germany, (2)Nottingham Trent University, Department of Chemistry and Forensics, Nottingham, United Kingdom, (3)University of Oldenburg, Oldenburg, Germany
 
Carbon export and particulate trace metal cycling across the Western Arctic Ocean (650959)
Erin E Black1,2, Matthew A Charette3, Phoebe J Lam4, Robert F Anderson5, Lauren Elizabeth Kipp6, Yang Xiang4, Sebastian M Vivancos7, Stephanie Kienast1 and Ken Buesseler8, (1)Dalhousie University, Halifax, NS, Canada, (2)Lamont -Doherty Earth Observatory, Palisades, United States, (3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (4)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (5)Lamont-Doherty Earth Obs, Palisades, NY, United States, (6)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (7)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (8)Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States
 
Sulphide and Metal Levels in Hydrothermal Plumes from Major Vents Along the North Mid-Atlantic Ridge (651079)
Pascal Salaun1, Alastair J.M. Lough2, David González-Santana3, Joseph A Resing4, Alessandro Tagliabue5 and Maeve C Lohan2, (1)University of Liverpool, Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, (2)University of Southampton, Ocean and Earth Sciences, National Oceanography Centre, Southampton, United Kingdom, (3)Institut Universitaire Européen de la Mer, Université de Bretagne-Occidentale, Brest, France, (4)University of Washington Seattle Campus, Seattle, WA, United States, (5)University of Liverpool, Liverpool, United Kingdom
 
Dissolved And Particulate 226Ra Along GEOTRACES Pacific Meridional Transect (651176)
Emilie Le Roy1, Matthew A Charette1, Tristan J Horner1, Paul Henderson1, Pieter van Beek2 and Marc Souhaut2, (1)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (2)LEGOS Laboratoire d'Etudes en Geophysique et Oceanographie Spatiale, Toulouse, France
 
Comparison of air-sea exchange of mercury from the GEOTRACES GP15 cruise with data from other cruises in the Pacific Ocean: From similarity to discrepancy (651178)
Yipeng He, United States and Robert P Mason, University of Connecticut, Groton, CT, United States
 
Anthropogenic Asian Aerosols provide Fe to the North Pacific (651509)
Paulina Pinedo-Gonzalez1, Nicholas Hawco2, Randelle M Bundy3, Virginia Armbrust3, Michael J Follows4, B. B. Cael5, Angelicque E White5, Sara Ferrón5, David M Karl5 and Seth John6, (1)Lamont -Doherty Earth Observatory, Geochemistry, Palisades, NY, United States, (2)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (3)University of Washington, School of Oceanography, Seattle, WA, United States, (4)Massachusetts Institute of Technology, Cambridge, MA, United States, (5)University of Hawaii, Department of Oceanography, Honolulu, HI, United States, (6)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
 
Pb and Pb isotope ratios in the North Pacific: observations during the KH-12-4 GEOTRACES Japan cruise (651580)
Kazuhiro Norisuye, Niigata University, Niigata, Japan, Yuna Matsubara, Graduate School of Science & Technology Niigata University, Japan, Hajime Obata, Univ Tokyo, Kashiwa, Japan, Edward A Boyle, Massachusetts Institute of Technology, Cambridge, MA, United States, Masachica Nakagawa, Niigata Univ., Japan and Toshitaka Gamo, Univ Tokyo, Chiba, Japan
 
Near-bottom 230Th and 231Pa Scavenging and Anomalous 230Th Burial Rates in the South Pacific (651705)
Martin Q Fleisher1, Frank J Pavia2, Robert F Anderson2, Sebastian M Vivancos3, Jordan Abell4 and Gisela Winckler5, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Lamont-Doherty Earth Obs, Palisades, NY, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, NY, United States, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States
 
Following the Trail of Fukushima Tracers: Introducing Part II – Seven Years of North Pacific Mode Water Evolution (651780)
Sachiko Yoshida, Alison M Macdonald and Irina Rypina, Woods Hole Oceanographic Institution, PO, Woods Hole, MA, United States
 
Biogeochemical cycling of hydrogen sulfide in the oxic Pacific Ocean (651918)
Nicole Buckley, Old Dominion University, Ocean, Earth and Atmospheric Sciences, Norfolk, VA, United States and Gregory A Cutter, Old Dominion University, Norfolk, VA, United States
 
Significant Biological Uptake of Trace Metals in the Mertz Glacier Polynya, East Antarctica (652330)
David Janssen1, Matthias Sieber2, Michael Joseph Ellwood3, Tim M Conway4, Pamela M Barrett5, Christel Hassler6 and Sam Jaccard1, (1)University of Bern, Institute of Geological Sciences & Oeschger Center for Climate Change Research, Bern, Switzerland, (2)ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)University of South Florida, St. Petersburg, FL, United States, (5)The Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (6)Department F. -A. Forel for Environmental and Aquatic Sciences, University of Geneva, Switzerland., Geneva, Switzerland
 
Surface Ocean Trace Metal Distributions across Basin-Scale Transects: Patterns from GEOTRACES GP15 and a Comparison with GP16 and GA03 (652496)
Robert Freiberger1, Cristina Tusei1, Jacob I Begorre1, Jessica N Fitzsimmons2 and Claire P. Till1, (1)Humboldt State University, Chemistry, Arcata, CA, United States, (2)Texas A&M University, Oceanography, College Station, TX, United States
 
Rare Earth Elements partitioning in the North Atlantic (GEOVIDE cruise) (652572)
Marion Lagarde1, Nolwenn Lemaitre2,3, Hélène Planquette4, Melanie Grenier5, Moustafa Belhadj6, Quoc Viet Pham6 and Catherine Jeandel7, (1)LEGOS, University Paul Sabatier (IRD, CNES, CNRS, UPS), Toulouse, France, (2)Vrije Universiteit Brussel, Brussels, Belgium, (3)ETH Zurich, Zurich, Switzerland, (4)IUEM Institut Universitaire Européen de la Mer, LEMAR, CNRS, Plouzané, France, (5)LEGOS/CNRS, Toulouse, France, (6)LEGOS/CNRS, TIM, Toulouse, France, (7)LEGOS, Université de Toulouse, (IRD, CNES, CNRS, UPS), Toulouse, France
 
An Inverse Model Interpretation of the GEOTRACES Aluminum Transects (653134)
Hairong Xu and Thomas S Weber, University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States
 
A multi-element overview of upper ocean trace metal cycling in the Pacific Ocean: GEOTRACES GP15 PMT demi stations (654098)
Dylan Halbeisen1, Nathan Timothy Lanning2, Claire P. Till3 and Jessica N Fitzsimmons1, (1)Texas A&M University, Oceanography, College Station, TX, United States, (2)Texas A&M University College Station, College Station, TX, United States, (3)Humboldt State University, Chemistry, Arcata, CA, United States
 
Hydrothermal Fe flux analysis of Loihi Seamount using size partitioning and Fe isotopes (654664)
Nathan Timothy Lanning1, Matthias Sieber2, Janelle Steffen1, Brent Alan Summers3, Gabrielle Weiss4, Christopher R German5, Seth John6, William J Jenkins5, Reiner Schlitzer7, Mariko Hatta8, Alessandro Tagliabue9, Tim M Conway10 and Jessica N Fitzsimmons11, (1)Texas A&M University College Station, College Station, TX, United States, (2)ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland, (3)Florida State University, Tallahassee, FL, United States, (4)University of Hawaii at Manoa, Honolulu, United States, (5)WHOI, Woods Hole, MA, United States, (6)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (7)Alfred Wegener Inst, Bremerhaven, Germany, (8)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (9)University of Liverpool, Liverpool, United Kingdom, (10)University of South Florida, College of Marine Science and School of Geosciences, St. Petersburg, FL, United States, (11)Texas A&M University, Oceanography, College Station, TX, United States
 
How to Use the Enrichment Factor in Seawater to Identify Sinks and Sources in the Southern Ocean (654807)
Kathrin Wuttig1, Thomas W. Trull2, Pier van der Merwe3, Zanna Chase4, Paula Condepardo5, Thomas Holmes6, Pauline Latour7, Habacuc Pérez-Tribouillier7, Perron Morgane8, Ashley Townsend9,10 and Andrew R Bowie6, (1)Antarctic Climate & Ecosystems Cooperative Research Centre (ACE CRC), University of Tasmania, Hobart, TAS, Australia, (2)Commonwealth Scientific and Industrial Research Organisation, Marine and Atmospheric Research, Antarctic Climate Ecosystems Cooperative Research Centre, Hobart, TAS, Australia, (3)Antarctic Gateway Partnership, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (4)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (5)CSIRO Hobart, Hobart, TAS, Australia, (6)University of Tasmania, Hobart, Australia, (7)Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (8)Univ. of Tasmania, TAS, Australia, (9)Escondido, CA, United States, (10)University of Tasmania, Central Science Laboratory, Hobart, TAS, Australia
 
Distributions of Dissolved Iron along the 2018 U.S. GEOTRACES GP15 Pacific Meridional Transect (654907)
Gabrielle Weiss1, Mariko Hatta1, Chris I Measures1, Jessica N Fitzsimmons2, Nathan Timothy Lanning3, Tim M Conway4 and Matthias Sieber5, (1)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (2)Texas A&M University, Oceanography, College Station, TX, United States, (3)Texas A&M University College Station, College Station, TX, United States, (4)University of South Florida, College of Marine Science and School of Geosciences, St. Petersburg, FL, United States, (5)University of South Florida, St. Petersburg, College of Marine Science, St. Petersburg, United States
 
Dissolved cobalt speciation along the GEOTRACES Pacific meridional transect (GP15) (655287)
Rebecca Chmiel, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Karen L Casciotti, Stanford University, Stanford, United States, Gregory A Cutter, Old Dominion University, Norfolk, VA, United States, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States and Mak A Saito, WHOI, Woods Hole, MA, United States
 
Autonomous Optics of the Ocean Biological Carbon Pump: PIC and particle birefringence along the GEOTRACES GP15 transect. (655681)
James K B Bishop1, Vinicius Jose Amaral2, Phoebe J Lam2, Cristina Orrico, Todd Wood4 and Thorsten Stezelberger4, (1)University of California Berkeley, Berkeley, CA, United States, (2)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, CA, United States, (3)Lawrence Berkeley National Laboratory, Berkeley, CA, United States
 
High-resolution Upper Ocean Metal Distributions within the Sargasso Sea Revealed using the Clio Autonomous Vehicle (655874)
John A Breier Jr1, Eric W Chan2, Mak A Saito3, Michael Jakuba4, Brianna Alanis1, Rebecca Chmiel5, Marissa Morgan Kellogg5, Matthew R McIlvin5, Dawn M Moran5, Victor Naklicki6, Paloma Lopez7, Quinn Wright Montgomery8 and Rodney Johnson9, (1)University of Texas Rio Grande Valley, Edinburg, TX, United States, (2)University of Texas Rio Grande Valley, United States, (3)WHOI, Woods Hole, MA, United States, (4)Woods Hole Oceanographic Inst., Woods Hole, MA, United States, (5)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (6)Woods Hole Oceanographic Institution, Woods Hole, United States, (7)Bermuda Institute of Ocean Sciences, St.George's, Bermuda, (8)Bermuda Institute of Ocean Sciences, BATS, St. Georges, Bermuda, (9)Bermuda Institute of Ocean Sciences, St. George's, Bermuda
 
Mercury and Trace Metal Cycling in the Surface North Pacific Ocean (656235)
Emily Seelen1, Nicholas Hawco1, Randelle M Bundy2, Ji Woon Park2, Robert P Mason3 and Seth John4, (1)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (2)University of Washington, School of Oceanography, Seattle, WA, United States, (3)University of Connecticut, Groton, CT, United States, (4)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
 
GEOTRACES GP15 Meridional Section: Preliminary Results for REEs, Ba, V, methane, and Other Dissolved Trace Elements (656580)
Alan M Shiller, University of Southern Mississippi, Marine Science, Stennis Space Center, MS, United States
 
Anthropogenic CO2 accumulation in the Indian Ocean (1995 to 2018). Results from the GO-SHIP I07N repeat-hydrography transect. (657015)
Carmen Rodriguez, University of Miami, RSMAS, Miami, FL, United States and Frank J Millero Jr, University of Miami, RSMAS, Ocean Sciences, Miami, FL, United States
 
Variations in Salinity and Oxygen Isotopes in the Southern Indian Ocean (657168)
Haley Courser1, Nicholas R Waring1, Amy J Wagner2, Elisabeth L Sikes3, Thomas Williams4 and Sujata A Murty5, (1)California State University Sacramento, Geology, Sacramento, CA, United States, (2)California State University Sacramento, Sacramento, CA, United States, (3)Rutgers University, Piscataway, NJ, United States, (4)University of Florida, Ft Walton Beach, United States, (5)Organization Not Listed, Washington, DC, United States
 
A multi-element perspective on Pacific dissolved trace metal cycling from the GEOTRACES GP15 PMT cruise (657658)
Jessica N Fitzsimmons1, Nathan Timothy Lanning2, Dylan Halbeisen1, Claire P. Till3, Mariko Hatta4, Gabrielle A Weiss4, Tim M Conway5, Matthias Sieber6, Seth John7, Shun-Chung Yang8 and Xiaopeng Bian7, (1)Texas A&M University, Oceanography, College Station, TX, United States, (2)Texas A&M University College Station, College Station, TX, United States, (3)Humboldt State University, Chemistry, Arcata, CA, United States, (4)University of Hawaii at Manoa, Oceanography, Honolulu, HI, United States, (5)University of South Florida, College of Marine Science and School of Geosciences, St. Petersburg, FL, United States, (6)University of South Florida, St. Petersburg, College of Marine Science, St. Petersburg, United States, (7)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (8)Academia Sinica, Research Center for Environmental Changes, Taipei, Taiwan
 
Mapping Oxygen Isotopes in the North Pacific Ocean (657682)
Kailah Jenkins, California State University Sacramento, Geology Department, Sacramento, CA, United States and Amy J Wagner, California State University Sacramento, Sacramento, CA, United States
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