Jones Elizabeth M.

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Jones
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Elizabeth M.
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Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean

2020-07-17 , Lebrato, Mario , Garbe-Schonberg, Dieter , Müller, Marius N. , Blanco-Ameijeiras, Sonia , Feely, Richard A. , Lorenzoni, Laura , Molinero, Juan-Carlos , Bremer, Karen , Jones, Daniel O. B. , Iglesias-Rodriguez, M. Debora , Greeley, Dana , Lamare, Miles D. , Paulmier, Aurelien , Graco, Michelle , Cartes, Joan , Barcelos e Ramos, Joana , de Lara, Ana , Sanchez-Leal, Ricardo , Jimenez, Paz , Paparazzo, Flavio E. , Hartman, Susan , Westernströer, Ulrike , Küter, Marie , Benavides, Roberto , da Silva, Armindo F. , Bell, Steven , Payne, Chris , Olafsdottir, Solveig R. , Robinson, Kelly , Jantunen, Liisa M. , Korablev, Alexander , Webster, Richard J. , Jones, Elizabeth M. , Gilg, Olivier , Bailly du Bois, Pascal , Beldowski, Jacek , Ashjian, Carin J. , Yahia, Nejib D. , Twining, Benjamin S. , Chen, Xue-Gang , Tseng, Li-Chun , Hwang, Jiang-Shiou , Dahms, Hans-Uwe , Oschlies, Andreas

Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms' biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect.

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The transpolar drift as a source of riverine and shelf-derived trace elements to the central Arctic Ocean

2020-04-08 , Charette, Matthew A. , Kipp, Lauren , Jensen, Laramie T. , Dabrowski, Jessica S. , Whitmore, Laura M. , Fitzsimmons, Jessica N. , Williford, Tatiana , Ulfsbo, Adam , Jones, Elizabeth M. , Bundy, Randelle M. , Vivancos, Sebastian M. , Pahnke, Katharina , John, Seth G. , Xiang, Yang , Hatta, Mariko , Petrova, Mariia V. , Heimbürger, Lars-Eric , Bauch, Dorothea , Newton, Robert , Pasqualini, Angelica , Agather, Alison , Amon, Rainer M. W. , Anderson, Robert F. , Andersson, Per S. , Benner, Ronald , Bowman, Katlin , Edwards, R. Lawrence , Gdaniec, Sandra , Gerringa, Loes J. A. , González, Aridane G. , Granskog, Mats A. , Haley, Brian , Hammerschmidt, Chad R. , Hansell, Dennis A. , Henderson, Paul B. , Kadko, David C. , Kaiser, Karl , Laan, Patrick , Lam, Phoebe J. , Lamborg, Carl H. , Levier, Martin , Li, Xianglei , Margolin, Andrew R. , Measures, Christopher I. , Middag, Rob , Millero, Frank J. , Moore, Willard S. , Paffrath, Ronja , Planquette, Helene , Rabe, Benjamin , Reader, Heather , Rember, Robert , Rijkenberg, Micha J. A. , Roy-Barman, Matthieu , van der Loeff, Michiel Rutgers , Saito, Mak A. , Schauer, Ursula , Schlosser, Peter , Sherrell, Robert M. , Shiller, Alan M. , Slagter, Hans , Sonke, Jeroen E. , Stedmon, Colin , Woosley, Ryan J. , Valk, Ole , van Ooijen, Jan , Zhang, Ruifeng

A major surface circulation feature of the Arctic Ocean is the Transpolar Drift (TPD), a current that transports river‐influenced shelf water from the Laptev and East Siberian Seas toward the center of the basin and Fram Strait. In 2015, the international GEOTRACES program included a high‐resolution pan‐Arctic survey of carbon, nutrients, and a suite of trace elements and isotopes (TEIs). The cruises bisected the TPD at two locations in the central basin, which were defined by maxima in meteoric water and dissolved organic carbon concentrations that spanned 600 km horizontally and ~25–50 m vertically. Dissolved TEIs such as Fe, Co, Ni, Cu, Hg, Nd, and Th, which are generally particle‐reactive but can be complexed by organic matter, were observed at concentrations much higher than expected for the open ocean setting. Other trace element concentrations such as Al, V, Ga, and Pb were lower than expected due to scavenging over the productive East Siberian and Laptev shelf seas. Using a combination of radionuclide tracers and ice drift modeling, the transport rate for the core of the TPD was estimated at 0.9 ± 0.4 Sv (106 m3 s−1). This rate was used to derive the mass flux for TEIs that were enriched in the TPD, revealing the importance of lateral transport in supplying materials beneath the ice to the central Arctic Ocean and potentially to the North Atlantic Ocean via Fram Strait. Continued intensification of the Arctic hydrologic cycle and permafrost degradation will likely lead to an increase in the flux of TEIs into the Arctic Ocean.

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The GEOTRACES Intermediate Data Product 2017

2018-06-01 , Schlitzer, Reiner , Anderson, Robert F. , Dodas, Elena Masferrer , Lohan, Maeve C. , Geibert, Walter , Tagliabue, Alessandro , Bowie, Andrew R. , Jeandel, Catherine , Maldonado, Maria T. , Landing, William M. , Cockwell, Donna , Abadie, Cyril , Abouchami, Wafa , Achterberg, Eric P. , Agather, Alison , Aguliar-Islas, Ana , van Aken, Hendrik M. , Andersen, Morten , Archer, Corey , Auro, Maureen E. , Baar, Hein J. W. de , Baars, Oliver , Baker, Alex R. , Bakker, Karel , Basak, Chandranath , Baskaran, Mark , Bates, Nicholas R. , Bauch, Dorothea , van Beek, Pieter , Behrens, Melanie K. , Black, Erin E. , Bluhm, Katrin , Bopp, Laurent , Bouman, Heather , Bowman, Katlin , Bown, Johann , Boyd, Philip , Boye, Marie , Boyle, Edward A. , Branellec, Pierre , Bridgestock, Luke , Brissebrat, Guillaume , Browning, Thomas , Bruland, Kenneth W. , Brumsack, Hans-Jürgen , Brzezinski, Mark A. , Buck, Clifton S. , Buck, Kristen N. , Buesseler, Ken O. , Bull, Abby , Butler, Edward , Cai, Pinghe , Cámara Mor, Patricia , Cardinal, Damien , Carlson, Craig , Carrasco, Gonzalo , Casacuberta, Nuria , Casciotti, Karen L. , Castrillejo, Maxi , Chamizo, Elena , Chance, Rosie , Charette, Matthew A. , Chaves, Joaquin E. , Cheng, Hai , Chever, Fanny , Christl, Marcus , Church, Thomas M. , Closset, Ivia , Colman, Albert S. , Conway, Tim M. , Cossa, Daniel , Croot, Peter L. , Cullen, Jay T. , Cutter, Gregory A. , Daniels, Chris , Dehairs, Frank , Deng, Feifei , Dieu, Huong Thi , Duggan, Brian , Dulaquais, Gabriel , Dumousseaud, Cynthia , Echegoyen-Sanz, Yolanda , Edwards, R. Lawrence , Ellwood, Michael J. , Fahrbach, Eberhard , Fitzsimmons, Jessica N. , Flegal, A. Russell , Fleisher, Martin Q. , van de Flierdt, Tina , Frank, Martin , Friedrich, Jana , Fripiat, Francois , Fröllje, Henning , Galer, Stephen J. G. , Gamo, Toshitaka , Ganeshram, Raja S. , Garcia-Orellana, Jordi , Garcia Solsona, Ester , Gault-Ringold, Melanie , George, Ejin , Gerringa, Loes J. A. , Gilbert, Melissa , Godoy, Jose Marcus , Goldstein, Steven L. , Gonzalez, Santiago , Grissom, Karen , Hammerschmidt, Chad R. , Hartman, Alison , Hassler, Christel , Hathorne, Ed C. , Hatta, Mariko , Hawco, Nicholas J. , Hayes, Christopher T. , Heimbürger, Lars-Eric , Helgoe, Josh , Heller, Maija Iris , Henderson, Gideon M. , Henderson, Paul B. , van Heuven, Steven , Ho, Peng , Horner, Tristan J. , Hsieh, Yu-Te , Huang, Kuo-Fang , Humphreys, Matthew P. , Isshiki, Kenji , Jacquot, Jeremy E. , Janssen, David J. , Jenkins, William J. , John, Seth , Jones, Elizabeth M. , Jones, Janice L. , Kadko, David , Kayser, Rick , Kenna, Timothy C. , Khondoker, Roulin , Kim, Taejin , Kipp, Lauren , Klar, Jessica K. , Klunder, Maarten , Kretschmer, Sven , Kumamoto, Yuichiro , Laan, Patrick , Labatut, Marie , Lacan, Francois , Lam, Phoebe J. , Lambelet, Myriam , Lamborg, Carl H. , le Moigne, Frederique , Le Roy, Emilie , Lechtenfeld, Oliver J. , Lee, Jong-Mi , Lherminier, Pascale , Little, Susan , López-Lora, Mercedes , Lu, Yanbin , Masque, Pere , Mawji, Edward , McClain, Charles R. , Measures, Christopher I. , Mehic, Sanjin , Menzel Barraqueta, Jan-Lukas , Merwe, Pier van der , Middag, Rob , Mieruch, Sebastian , Milne, Angela , Minami, Tomoharu , Moffett, James W. , Moncoiffe, Gwenaelle , Moore, Willard S. , Morris, Paul J. , Morton, Peter L. , Nakaguchi, Yuzuru , Nakayama, Noriko , Niedermiller, John , Nishioka, Jun , Nishiuchi, Akira , Noble, Abigail E. , Obata, Hajime , Ober, Sven , Ohnemus, Daniel C. , van Ooijen, Jan , O'Sullivan, Jeanette , Owens, Stephanie A. , Pahnke, Katharina , Paul, Maxence , Pavia, Frank , Pena, Leopoldo D. , Peters, Brian , Planchon, Frederic , Planquette, Helene , Pradoux, Catherine , Puigcorbé, Viena , Quay, Paul D. , Queroue, Fabien , Radic, Amandine , Rauschenberg, Sara , Rehkämper, Mark , Rember, Robert , Remenyi, Tomas A. , Resing, Joseph A. , Rickli, Joerg , Rigaud, Sylvain , Rijkenberg, Micha J. A. , Rintoul, Stephen R. , Robinson, Laura F. , Roca-Martí, Montserrat , Rodellas, Valenti , Roeske, Tobias , Rolison, John M. , Rosenberg, Mark , Roshan, Saeed , Rutgers van der Loeff, Michiel M. , Ryabenko, Evgenia , Saito, Mak A. , Salt, Lesley , Sanial, Virginie , Sarthou, Geraldine , Schallenberg, Christina , Schauer, Ursula , Scher, Howie , Schlosser, Christian , Schnetger, Bernhard , Scott, Peter M. , Sedwick, Peter N. , Semiletov, Igor P. , Shelley, Rachel U. , Sherrell, Robert M. , Shiller, Alan M. , Sigman, Daniel M. , Singh, Sunil Kumar , Slagter, Hans , Slater, Emma , Smethie, William M. , Snaith, Helen , Sohrin, Yoshiki , Sohst, Bettina M. , Sonke, Jeroen E. , Speich, Sabrina , Steinfeldt, Reiner , Stewart, Gillian , Stichel, Torben , Stirling, Claudine H. , Stutsman, Johnny , Swarr, Gretchen J. , Swift, James H. , Thomas, Alexander , Thorne, Kay , Till, Claire P. , Till, Ralph , Townsend, Ashley T. , Townsend, Emily , Tuerena, Robyn , Twining, Benjamin S. , Vance, Derek , Velazquez, Sue , Venchiarutti, Celia , Villa-Alfageme, Maria , Vivancos, Sebastian M. , Voelker, Antje H. L. , Wake, Bronwyn , Warner, Mark J. , Watson, Ros , van Weerlee, Evaline , Weigand, M. Alexandra , Weinstein, Yishai , Weiss, Dominik , Wisotzki, Andreas , Woodward, E. Malcolm S. , Wu, Jingfeng , Wu, Yingzhe , Wuttig, Kathrin , Wyatt, Neil , Xiang, Yang , Xie, Ruifang C. , Xue, Zichen , Yoshikawa, Hisayuki , Zhang, Jing , Zhang, Pu , Zhao, Ye , Zheng, Linjie , Zheng, Xin-Yuan , Zieringer, Moritz , Zimmer, Louise A. , Ziveri, Patrizia , Zunino, Patricia , Zurbrick, Cheryl

The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the previous IDP2014. For the first time, the IDP2017 contains data for a large suite of biogeochemical parameters as well as aerosol and rain data characterising atmospheric trace element and isotope (TEI) sources. The TEI data in the IDP2017 are quality controlled by careful assessment of intercalibration results and multi-laboratory data comparisons at crossover stations. The IDP2017 consists of two parts: (1) a compilation of digital data for more than 450 TEIs as well as standard hydrographic parameters, and (2) the eGEOTRACES Electronic Atlas providing an on-line atlas that includes more than 590 section plots and 130 animated 3D scenes. The digital data are provided in several formats, including ASCII, Excel spreadsheet, netCDF, and Ocean Data View collection. Users can download the full data packages or make their own custom selections with a new on-line data extraction service. In addition to the actual data values, the IDP2017 also contains data quality flags and 1-σ data error values where available. Quality flags and error values are useful for data filtering and for statistical analysis. Metadata about data originators, analytical methods and original publications related to the data are linked in an easily accessible way. The eGEOTRACES Electronic Atlas is the visual representation of the IDP2017 as section plots and rotating 3D scenes. The basin-wide 3D scenes combine data from many cruises and provide quick overviews of large-scale tracer distributions. These 3D scenes provide geographical and bathymetric context that is crucial for the interpretation and assessment of tracer plumes near ocean margins or along ridges. The IDP2017 is the result of a truly international effort involving 326 researchers from 25 countries. This publication provides the critical reference for unpublished data, as well as for studies that make use of a large cross-section of data from the IDP2017. This article is part of a special issue entitled: Conway GEOTRACES - edited by Tim M. Conway, Tristan Horner, Yves Plancherel, and Aridane G. González.