973 Works

Concentration of organic compounds in slush, under-ice water, and the snow-ice fast-ice cover of the southeast sector of the Antarctic in April 2008, supplement to: Nemirovskaya, Inna A; Chemyavskii, N G (2011): Studies of hydrocarbons in the waters and snow-ice cover of the southeast sector of the Antarctic. Translated from Okeanologiya, 2011, 51(1), 5-15, Oceanology, 51(1), 4-14

Inna A Nemirovskaya & N G Chemyavskii
Data are presented on concentration of hydrocarbons (HC) relative to concentrations of suspended matter, lipids, organic carbon, and chlorophyll a in surface waters and snow-ice cover of the East Antarctic coastal areas. It was shown that growth of concentrations of aliphatic HC (AHC) to 30 µg/l in surface waters takes place in frontal zones and under young ice formation. AHC concentration in snow increases with growth of aerosol concentration in the atmosphere. In the lower...

Surface Ocean CO2 Atlas (SOCAT) V1.4, supplement to: Pfeil, Benjamin; Olsen, Are; Bakker, Dorothee C E; Hankin, Steven; Koyuk, Heather; Kozyr, Alexander; Malczyk, Jeremy; Manke, Ansley; Metzl, Nicolas; Sabine, Christopher L; Akl, John; Alin, Simone R; Bellerby, Richard G J; Borges, Alberto Vieira; Boutin, Jacqueline; Brown, Peter J; Cai, Wei-Jun; Chavez, Francisco P; Chen, Arthur; Cosca, Catherine E; Fassbender, Andrea J; Feely, Richard A; González-Dávila, Melchor; Goyet, Catherine; Hardman-Mountford, Nicolas J; Heinze, Christoph; Hood, E Maria; Hoppema, Mario; Hunt, Christopher W; Hydes, David; Ishii, Masao; Johannessen, Truls; Jones, Steve D; Key, Robert M; Körtzinger, Arne; Landschützer, Peter; Lauvset, Siv K; Lefèvre, Nathalie; Lenton, Andrew; Lourantou, Anna; Merlivat, Liliane; Midorikawa, Takashi; Mintrop, Ludger J; Miyazaki, Chihiro; Murata, Akihiko; Nakadate, Akira; Nakano, Yoshiyuki; Nakaoka, Shin-Ichiro; Nojiri, Yukihiro; Omar, Abdirahman M; Padín, Xose Antonio; Park, Geun-Ha; Paterson, Kristina; Pérez, Fiz F; Pierrot, Denis; Poisson, Alain; Ríos, Aida F; Santana-Casiano, Juana Magdalena; Salisbury, Joe; Sarma, Vedula V S S; Schlitzer, Reiner; Schneider, Bernd; Schuster, Ute; Sieger, Rainer; Skjelvan, Ingunn; Steinhoff, Tobias; Suzuki, Toru; Takahashi, Taro; Tedesco, Kathy; Telszewski, Maciej; Thomas, Helmuth; Tilbrook, Bronte; Tjiputra, Jerry; Vandemark, Doug; Veness, Tony; Wanninkhof, Rik; Watson, Andrew J; Weiss, Ray F; Wong, Chi Shing; Yoshikawa-Inoue, Hisayuki (2013): A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT). Earth System Science Data, 5(1), 125-143

Benjamin Pfeil, Are Olsen, Dorothee C E Bakker, Steven Hankin, Heather Koyuk, Alexander Kozyr, Jeremy Malczyk, Ansley Manke, Nicolas Metzl, Christopher L Sabine, John Akl, Simone R Alin, Richard G J Bellerby, Alberto Vieira Borges, Jacqueline Boutin, Peter J Brown, Wei-Jun Cai, Francisco P Chavez, Arthur Chen, Catherine E Cosca, Andrea J Fassbender, Richard A Feely, Melchor González-Dávila, Catherine Goyet, Nicolas J Hardman-Mountford … & Hisayuki Yoshikawa-Inoue
A well-documented, publicly available, global data set of surface ocean carbon dioxide (CO2) parameters has been called for by international groups for nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was initiated by the international marine carbon science community in 2007 with the aim of providing a comprehensive, publicly available, regularly updated, global data set of marine surface CO2, which had been subject to quality control (QC). Many additional CO2 data, not yet...

Temperature and δ¹⁸O measurements from different ODP Sites at the shelf and upper slope of the Peru Margin, supplement to: Meister, Patrick; Bernasconi, Stefano M; Vasconcelos, Crisogono; McKenzie, Judith A (2008): Sealevel changes control diagenetic dolomite formation in hemipelagic sediments of the Peru Margin. Marine Geology, 252(3-4), 166-173

Patrick Meister, Stefano M Bernasconi, Crisogono Vasconcelos & Judith A McKenzie
The first experimentally determined temperature dependent oxygen-18 fractionation factor between dolomite and water at low temperatures [Vasconcelos et al. 1995 doi:10.1130/G20992.1] allows now the precise calculation of temperatures during early diagenetic dolomite precipitation. We use d18O values of early diagenetic dolomite beds sampled during ODP Legs 112 and 201 on the Peru continental margin (Sites 1227, 1228 and 1229) [Meister et al. 2007, doi:10.1111/j.1365-3091.2007.00870.x] to calculate paleo-porewater temperatures at the time of dolomite precipitation. We...

U/Th systematics of authigenic carbonates and δ¹⁸O records from Hydrate Ridge, off the coast of Oregon, USA, supplement to: Teichert, Barbara M A; Eisenhauer, Anton; Bohrmann, Gerhard; Haase-Schramm, Alexandra; Bock, Barbara; Linke, Peter (2003): U/Th systematics and ages of authigenic carbonates from Hydrate Ridge, Cascadia Margin: Recorders of fluid flow variations. Geochimica et Cosmochimica Acta, 67(20), 3845-3857

Barbara M A Teichert, Anton Eisenhauer, Gerhard Bohrmann, Alexandra Haase-Schramm, Barbara Bock & Peter Linke
Uranium (U) concentrations and activity ratios (d234U) of authigenic carbonates are sensitive recorders of different fluid compositions at submarine seeps of hydrocarbon-rich fluids ("cold seeps") at Hydrate Ridge, off the coast of Oregon, USA. The low U concentrations (mean: 1.3 ± 0.4 µg/g) and high 234U values (165-317 per mil) of gas hydrate carbonates reflect the influence of sedimentary pore water indicating that these carbonates were formed under reducing conditions below or at the seafloor....

Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005

Eva M Niedermeyer, Enno Schefuß, Alex L Sessions, Stefan Mulitza, Gesine Mollenhauer, Michael Schulz & Gerold Wefer
To reconstruct variability of the West African monsoon and associated vegetation changes on precessional and millennial time scales, we analyzed a marine sediment core from the continental slope off Senegal spanning the past 44,000 years (44 ka). We used the stable hydrogen isotopic composition (dD) of individual terrestrial plant wax n-alkanes as a proxy for past rainfall variability. The abundance and stable carbon isotopic composition (d13C) of the same compounds were analyzed to assess changes...

Light absorption and phytoplankton biomass in the Black Sea in spring 1995, supplement to: Churilova, T Ya (2001): Light absorption by phytoplankton and detritus in the Black Sea in spring. Translated from Okeanologiya, 2001, 41(5), 719-727, Oceanology, 41(5), 687-695

T Ya Churilova
Spectra of light absorption by suspended matter, phytoplankton, and detritus in the central and coastal parts of the Black Sea over the spring period (March-April 1995) were determined. Vertical homogeneity of the upper 40 m layer with respect to parameters in study was noted. Value of light absorption by phytoplankton normalized with respect to chlorophyll a was virtually independent of chlorophyll a concentration. A linear relationship between light absorption by phytoplankton and chlorophyll a concentration...

Seawater carbonate chemistry, nutrients and growth rate during experiments with coral Astrangia poculata and field observations, 2010

Michael Holcomb, Daniel C McCorkle & Anne L Cohen
Zooxanthellate colonies of the scleractinian coral Astrangia poculata were grown under combinations of ambient and elevated nutrients (5 µM NO, 0.3 µM PO4, and 2nM Fe) and CO2 (780 ppmv) treatments for a period of 6 months. Coral calcification rates, estimated from buoyant weights, were not significantly affected by moderately elevated nutrients at ambient CO2 and were negatively affected by elevated CO2 at ambient nutrient levels. However, calcification by corals reared under elevated nutrients combined...

Seawater carbonate chemistry and biological processes of coral Acropora muricata during experiments and observations in La Saline fringing reef, La Reunion Island, western Indian Ocean, 2011, supplement to: Chauvin, Anne; Denis, Vianney; Cuet, Pascale (2011): Is the response of coral calcification to seawater acidification related to nutrient loading? Coral Reefs, 30(4), 911-923

Anne Chauvin, Vianney Denis & Pascale Cuet
The effect of decreasing aragonite saturation state (Omega Arag) of seawater (elevated pCO2) on calcification rates of Acropora muricata was studied using nubbins prepared from parent colonies located at two sites of La Saline reef (La Réunion Island, western Indian Ocean): a back-reef site (BR) affected by nutrient-enriched groundwater discharge (mainly nitrate), and a reef flat site (RF) with low terrigenous inputs. Protein and chlorophyll a content of the nubbins, as well as zooxanthellae abundance,...

Seawater carbonate chemistry and accumulation of radiotracers in squid, Loligo vulgaris during experiments, 2011, supplement to: Lacoue-Labarthe, Thomas; Reveillac, E; Oberhänsli, F; Teyssié, Jean-Louis; Jeffree, Ross; Gattuso, Jean-Pierre (2011): Effects of ocean acidification on trace element accumulation in the early-life stages of squid Loligo vulgaris. Aquatic Toxicology, 105(1-2), 166-176

Thomas Lacoue-Labarthe, E Reveillac, F Oberhänsli, Jean-Louis Teyssié, Ross Jeffree & Jean-Pierre Gattuso
The anthropogenic release of carbon dioxide (CO2) into the atmosphere leads to an increase in the CO2 partial pressure (pCO2) in the ocean, which may reach 950 ?atm by the end of the 21st century. The resulting hypercapnia (high pCO2) and decreasing pH ("ocean acidification") are expected to have appreciable effects on water-breathing organisms, especially on their early-life stages. For organisms like squid that lay their eggs in coastal areas where the embryo and then...

Effects of seawater acidification on early development of the intertidal sea urchin Paracentrotus lividus, seawater carbonate chemistry and biological processes, supplement to: Moulin, Laure; Catarino, Ana Isabel; Claessens, Thomas; Dubois, Philippe (2011): Effects of seawater acidification on early development of the intertidal sea urchin Paracentrotus lividus (Lamarck 1816). Marine Pollution Bulletin, 62(1), 48-54

Laure Moulin, Ana Isabel Catarino, Thomas Claessens & Philippe Dubois
The effect of pH ranging from 8.0 to 6.8 (total scale - pHT) on fertilization, cleavage and larval development until pluteus stage was assessed in an intertidal temperate sea urchin. Gametes were obtained from adults collected in two contrasting tide pools, one showing a significant nocturnal pH decrease (lowest pHT = 7.4) and another where pH was more stable (lowest pHT = 7.8). The highest pHT at which significant effects on fertilization and cleavage were...

Chemistry and biological processes during experiments with spider crab Hyas araneus, supplement to: Walther, Kathleen; Sartoris, Franz-Josef; Pörtner, Hans-Otto (2011): Impacts of temperature and acidification on larval calcium incorporation of the spider crab Hyas araneus from different latitudes (54° vs. 79°N). Marine Biology, 158(9), 2043-2053

Kathleen Walther, Franz-Josef Sartoris & Hans-Otto Pörtner
The combined effects of ocean warming and acidification were compared in larvae from two popula- tions of the cold-eurythermal spider crab Hyas araneus, from one of its southernmost populations (around Helgo- land, southern North Sea, 54°N, habitat temperature 3-18°C; collection: January 2008, hatch: January-February 2008) and from one of its northernmost populations (Svalbard, North Atlantic, 79°N, habitat temperature 0-6°C; collection: July 2008, hatch: February-April 2009). Larvae were exposed to temperatures of 3, 9 and 15°C...

Seawater carbonate chemistry and photosynthetic response of Emiliania huxleyi (CS-369) to UV radiation and elevated temperature duirng experiments, 2011, supplement to: Xu, Kai; Gao, Kunshan; Villafañe, Virginia E; Heibling, E W (2011): Photosynthetic responses of Emiliania huxleyi to UV radiation and elevated temperature: roles of calcified coccoliths. Biogeosciences, 8(6), 1441-1452

Kai Xu, Kunshan Gao, Virginia E Villafañe & E W Heibling
Changes in calcification of coccolithophores may affect their photosynthetic responses to both, ultraviolet radiation (UVR, 280-400 nm) and temperature. We operated semi-continuous cultures of Emiliania huxleyi (strain CS-369) at reduced (0.1 mM, LCa) and ambient (10 mM, HCa) Ca2+ concentrations and, after 148 generations, we exposed cells to six radiation treatments (>280, >295, >305, >320, >350 and >395 nm by using Schott filters) and two temperatures (20 and 25 °C) to examine photosynthesis and calcification...

Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010, supplement to: Wu, YaPing; Gao, Kunshan (2010): Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea. Chinese Science Bulletin, 55(32), 3680-3686

YaPing Wu & Kunshan Gao
We carried out short term pCO2/pH perturbation experiments in the coastal waters of the South China Sea to evaluate the combined effects of seawater acidification (low pH/high pCO2) and solar UV radiation (UVR, 280-400 nm) on photosynthetic carbon fixation of phytoplankton assemblages. Under photosynthetically active radiation (PAR) alone treatments, reduced pCO2 (190 ppmv) with increased pH resulted in a significant decrease in the photosynthetic carbon fixation rate (about 23%), while enriched pCO2 (700 ppmv) with...

Data compilation of VEINS

VEINS Members, Naokazu Ahagon, J Alvarez, O Asthorsson, H Bjoerke, Johan Blindheim, Johannes Briem, W Paul Budgell, B Ellertsen, Eberhard Fahrbach, Arne Foldvik, P Fossum, H Gjoesaeter, H Gronevall, Bogi Hansen, Peter Mosby Haugan, Jens Christian Holst, U Hübner, S Kaartvedt, Yoshie Kasajima, Jouko Launiainen, Harald Loeng, Terje Loyning, Svend-Aage Malmberg, Jens Meincke … & K Westerheim
This data collection contains physical oceanographic and hydrochemistry data from 82 cruises in the frame of the project VEINS -Variability of Exchanges in the Northern Seas.

Neodymium and Strontium chemistry of Arctic Ocean sediments, supplement to: Haley, Brian A; Frank, Martin; Spielhagen, Robert F; Eisenhauer, Anton (2008): Influence of brine formation on Arctic Ocean circulation over the past 15 million years. Nature Geoscience, 1, 68-72

Brian A Haley, Martin Frank, Robert F Spielhagen & Anton Eisenhauer
The early oceanographic history of the Arctic Ocean is important in regulating, and responding to, climatic changes. However, constraints on its oceanographic history preceding the Quaternary (the past 1.8 Myr) have become available only recently, because of the difficulties associated with obtaining continuous sediment records in such a hostile setting. Here, we use the neodymium isotope compositions of two sediment cores recovered near the North Pole to reconstruct over the past ~5 Myr the sources...

Isotope composition of dolomite, calcite and pore-waters of ODP Leg 210 samples, supplement to: Meister, Patrick; McKenzie, Judith A; Vasconcelos, Crisogono; Bernasconi, Stefano M; Frank, Martin; Gutjahr, Marcus; Schrag, Daniel P (2007): Dolomite formation in the dynamic deep biosphere: results from the Peru Margin. Sedimentology, 54(5), 1007-1032

Patrick Meister, Judith A McKenzie, Crisogono Vasconcelos, Stefano M Bernasconi, Martin Frank, Marcus Gutjahr & Daniel P Schrag
Early diagenetic dolomite beds were sampled during the Ocean Drilling Programme (ODP) Leg 201 at four reoccupied ODP Leg 112 sites on the Peru continental margin (Sites 1227/684, 1228/680, 1229/681 and 1230/685) and analysed for petrography, mineralogy, d13C, d18O and 87Sr/86Sr values. The results are compared with the chemistry, and d13C and 87Sr/86Sr values of the associated porewater. Petrographic relationships indicate that dolomite forms as a primary precipitate in porous diatom ooze and siliciclastic sediment...

Geochemical investigation and determination of hiatuses on Voering Plateau sediment records, supplement to: Bruns, P; Dullo, Wolf Christian; Hay, William W; Frank, Martin; Kubik, Peter W (1998): Hiatuses on Voering Plateau: sedimentary gaps or preservation artifacts? Marine Geology, 145(1-2), 61-84

P Bruns, Wolf Christian Dullo, William W Hay, Martin Frank & Peter W Kubik
The sediments recovered on ODP Leg 104 have been reported to be characterized by hiatuses. The hiatuses were defined by biostratigraphy and were believed to be caused by erosion related to temporary changes of bottom current composition and velocity. They have been associated with major paleoenvironmental changes, reorganization of global deep water production, and increased bottom water flows. Because of the importance of hiatuses for ongoing research, we decided to closely investigate the sedimentation history...

Rare earth elements from the Atlantic Sector, supplement to: Wegner, Anna; Gabrielli, Paolo; Wilhelms-Dick, Dorothee; Ruth, Urs; Kriews, Michael; De Deckker, Patrick; Barbante, Carlo; Cozzi, Giulio; Delmonte, Barbara; Fischer, H (2012): Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation. Climate of the Past, 8(1), 135-147

Anna Wegner, Paolo Gabrielli, Dorothee Wilhelms-Dick, Urs Ruth, Michael Kriews, Patrick De Deckker, Carlo Barbante, Giulio Cozzi, Barbara Delmonte & Hubertus Fischer
We present a Rare Earth Elements (REE) record at decadal resolution determined in the EPICA ice core drilled in Dronning Maud Land (EDML) in the Atlantic Sector of the East Antarctic Plateau, covering the transition from the last glacial age (LGA) to the early Holocene (26 600-7500 yr BP). Additionally, samples from potential source areas (PSAs) for Antarctic dust were analysed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints...

Database of the GLAMAP project, supplement to: Vogelsang, Elke; Sarnthein, Michael; Pflaumann, Uwe (2001): d18O Stratigraphy, chronology, and sea surface temperatures of Atlantic sediment records (GLAMAP-2000 Kiel). Berichte-Reports, Institut für Geowissenschaften, Universität Kiel, 13, 13+244 pp.

Elke Vogelsang, Michael Sarnthein & Uwe Pflaumann
A uniform chronology for foraminifera-based sea surface temperature records has been established in more than 120 sediment cores obtained from the equatorial and eastern Atlantic up to the Arctic Ocean. The chronostratigraphy of the last 30,000 years is mainly based on published d18O records and 14C ages from accelerator mass spectrometry, converted into calendar-year ages. The high-precision age control provides the database necessary for the uniform reconstruction of the climate interval of the Last Glacial...

Geochemistry of ODP Sites 123-765 and 123-766, supplement to: Heggie, David T; Boreham, C J; Summons, Roger E (1992): Biomarker and pyrolysis geochemistry of organic matter from Argo and Gascoyne Abyssal Plain sediments, northeastern Indian Ocean. In: Gradstein, FM; Ludden, JN; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 123, 215-224

David T Heggie, C J Boreham & Roger E Summons
The sediments of the Argo and Gascoyne abyssal plains are generally lean in organic matter, are immature, and contain hydrocarbons trapped during sediment deposition rather than those generated during sediment catagenesis. TOC concentrations in the Argo Abyssal Plain Cenozoic sediments are 0.5 wt%, and organic matter appears to be from mixed marine and reworked, degraded, organic matter sources, with the latter being contributed by turbidity flows from the nearby continental margin. TOC concentrations within the...

Late Miocene palaeoflora and palaeoclimate of Lincang (China), supplement to: Jacques, Frédéric M B; Guo, Shuang-Xing; Su, Tao; Xing, Yao-Wu; Huang, Yong-Jiang; Liu, Yu-Sheng Christopher; Ferguson, David-Kay; Zhou, Zhekun (2011): Quantitative reconstruction of the Late Miocene monsoon climates of southwest China: A case study of the Lincang flora from Yunnan Province. Palaeogeography, Palaeoclimatology, Palaeoecology, 304(3-4), 318-327

Frédéric M B Jacques, Shuang-Xing Guo, Tao Su, Yao-Wu Xing, Yong-Jiang Huang, Yu-Sheng Christopher Liu, David-Kay Ferguson & Zhekun Zhou
The Miocene Lincang leaf assemblage is used in this paper as proxy data to reconstruct the palaeoclimate of southwestern Yunnan (SW China) and the evolution of monsoon intensity. Three quantitative methods were chosen for this reconstruction, i.e. Leaf Margin Analysis (LMA), Climate Leaf Analysis Multivariate Program (CLAMP), and the Coexistence Approach (CA). These methods, however, yield inconsistent results, particularly for the precipitation, as also shown in European and other East Asian Cenozoic floras. The wide...

Late Pliocene and Early Pleistocene dinoflagellate cysts and sea surface temperture reconstruction for several IODP and DSDP sites in the North Atlantic, supplement to: De Schepper, Stijn; Fischer, Eva I; Groeneveld, Jeroen; Head, Martin J; Matthiessen, Jens (2011): Deciphering the palaeoecology of Late Pliocene and Early Pleistocene dinoflagellate cysts. Palaeogeography, Palaeoclimatology, Palaeoecology, 309(1-2), 17-32

Stijn De Schepper, Eva I Fischer, Jeroen Groeneveld, Martin J Head & Jens Matthiessen
In an attempt to document the palaeoecological affinities of individual extant and extinct dinoflagellate cysts, Late Pliocene and Early Pleistocene dinoflagellate cyst assemblages have been compared with geochemical data from the same samples. Mg/Ca ratios of Globigerina bulloides were measured to estimate the spring-summer sea-surface temperatures from four North Atlantic IODP/DSDP sites. Currently, our Pliocene-Pleistocene database contains 204 dinoflagellate cyst samples calibrated to geochemical data. This palaeo-database is compared with modern North Atlantic and global...

Stable oxygen isotope and Mg/Ca ratios on Globorotalia inflata, supplement to: Groeneveld, Jeroen; Chiessi, Cristiano Mazur (2011): Mg/Ca ratios of Globorotalia inflata as a recorder of permanent thermocline temperatures in the South Atlantic. Paleoceanography, 26, PA2203

Jeroen Groeneveld & Cristiano Mazur Chiessi
We present a species-specific Mg/Ca-calcification temperature calibration for Globorotalia inflata from a suite of 38 core top samples from the South Atlantic (from 8° to 49°S). G. inflata is a deep-dwelling planktonic foraminifer commonly occurring in subtropical to subpolar conditions, which qualifies it for reconstructions of the permanent thermocline. Apparent calcification depths and calcification temperatures were determined by comparing measured d18O with equilibrium d18O of calcite based on water column properties. Based on our core...

Radiocarbon dataing, stable oxygen isotopes, and Mg/Ca ratios in surface sediment samples of the tropical eastern Indian Ocean, supplement to: Mohtadi, Mahyar; Oppo, Delia W; Lückge, Andreas; De Pol-Holz, Ricardo; Groeneveld, Jeroen; Steinke, Stephan; Hemme, Nils; Hebbeln, Dierk (2011): Reconstructing the thermal structure of the upper ocean: Insights from planktic foraminifera shell chemistry and alkenones in modern sediments of the tropical eastern Indian Ocean. Paleoceanography, 26, PA2119

Mahyar Mohtadi, Delia W Oppo, Andreas Lückge, Ricardo De Pol-Holz, Jeroen Groeneveld, Stephan Steinke, Nils Hemme & Dierk Hebbeln
Shell chemistry of planktic foraminifera and the alkenone unsaturation index in 69 surface sediment samples in the tropical eastern Indian Ocean off West and South Indonesia were studied. Results were compared to modern hydrographic data in order to assess how modern environmental conditions are preserved in sedimentary record, and to determine the best possible proxies to reconstruct seasonality, thermal gradient and upper water column characteristics in this part of the world ocean. Our results imply...

Mid-Pleistocene Mg/Ca, temperature and stable isotopes from Globigerinoides ruber white and Globorotalia inflata of sediment core GeoB3801-6 from the subtropical South Atlantic, supplement to: Rackebrandt, Nick; Kuhnert, Henning; Groeneveld, Jeroen; Bickert, Torsten (2011): Persisting maximum Agulhas leakage during MIS 14 indicated by massive Ethmodiscus oozes in the subtropical South Atlantic. Paleoceanography, 26, PA3202

Nick Rackebrandt, Henning Kuhnert, Jeroen Groeneveld & Torsten Bickert
The glacial marine isotope stage 14 (MIS 14) appears in many climate records as an unusually warm glacial. During this period an almost monospecific, up to 1.5 m thick, laminated layer of the giant diatom Ethmodiscus rex has been deposited below the South Atlantic Subtropical Gyre. This oligotrophic region is today less favorable for diatom growth with sediments typically consisting of calcareous nannofossil oozes. We have reconstructed temperatures and the stable oxygen isotopic compositions of...

Registration Year

  • 2011

Resource Types

  • Collection

Data Centers

  • Archaeology Data Service
  • LDEO - Lamont-Doherty Earth Observatory, Columbia University