983 Works

Global compilation of benthic data sets I, supplement to: Seiter, Katherina; Hensen, Christian; Schröter, Jürgen; Zabel, Matthias (2004): Organic carbon content in surface sediments-defining regional provinces. Deep Sea Research Part I: Oceanographic Research Papers, 51(12), 2001-2026

Katherina Seiter, Christian Hensen, Jürgen Schröter & Matthias Zabel
Approaches to quantify the organic carbon accumulation on a global scale generally do not consider the small-scale variability of sedimentary and oceanographic boundary conditions along continental margins. In this study, we present a new approach to regionalize the total organic carbon (TOC) content in surface sediments (<5 cm sediment depth). It is based on a compilation of more than 5500 single measurements from various sources. Global TOC distribution was determined by the application of a...

Sedimentology of surface samples from the Weddell Sea, Antarctica, supplement to: Diekmann, Bernhard; Kuhn, Gerhard (1999): Provenance and dispersal of glacial-marine surface sediments in the Weddell Sea and adjoining areas, Antarctica: ice-rafting versus current transport. Marine Geology, 158(1-4), 209-231

Bernhard Diekmann & Gerhard Kuhn
Mineralogical and granulometric properties of glacial-marine surface sediments of the Weddell Sea and adjoining areas were studied in order to decipher spatial variations of provenance and transport paths of terrigenous detritus from Antarctic sources. The silt fraction shows marked spatial differences in quartz contents. In the sand fractions heavy-mineral assemblages display low mineralogical maturity and are dominated by garnet, green hornblende, and various types of clinopyroxene. Cluster analysis yields distinct heavy-mineral assemblages, which can be...

Respiration and dissolution in sediments of the western Atlantic, supplement to: Hales, Burke; Emerson, Steven R; Archer, David E (1994): Respiration and dissolution in the sediments of the western North Atlantic: estimates from models of in situ microelectrode measurements of porewater oxygen and pH. Deep Sea Research Part I: Oceanographic Research Papers, 41(4), 695-719

Burke Hales, Steven R Emerson & David E Archer
We present in situ microelectrode measurements of sediment formation factor and porewater oxygen and pH from six stations in the North Atlantic varying in depth from 2159 to 5380 m. A numerical model of the oxygen data indicates that fluxes of oxygen to the sediments are as much as an order of magnitude higher than benthic chamber flux measurements previously reported in the same area. Model results require dissolution driven by metabolic CO2 production within...

Global data compilation of benthic data sets II, supplement to: Seiter, Katherina; Hensen, Christian; Zabel, Matthias (2005): Benthic carbon mineralization on a global scale. Global Biogeochemical Cycles, 19, GB1010

Katherina Seiter, Christian Hensen & Matthias Zabel
In this study we present a global distribution pattern and budget of the minimum flux of particulate organic carbon to the sea floor (J POC alpha). The estimations are based on regionally specific correlations between the diffusive oxygen flux across the sediment-water interface, the total organic carbon content in surface sediments, and the oxygen concentration in bottom waters. For this, we modified the principal equation of Cai and Reimers [1995] as a basic monod reaction...

X-ray analysis of sediment cores from cruise MD-01

David Van Rooij, Thomas Richter, Dominique Blamart & Audrey Lutringer
Tis datasets presents X-ray analysis of sediment cores from cruise MD-01.

Alkenones and sea surface reconstruction of sediments from, the Arabian Sea, supplement to: Rostek, Frauke; Bard, Édouard; Beaufort, Luc; Sonzogni, Corinne; Ganssen, Gerald M (1997): Sea surface temperature and productivity records for the past 240 kyr in the Arabian Sea. Deep Sea Research Part II: Topical Studies in Oceanography, 44(6-7), 1461-1480

Frauke Rostek, Édouard Bard, Luc Beaufort, Corinne Sonzogni & Gerald M Ganssen
Deep-sea sediments of two cores from the western (TY93-929/P) and the southeastern (MD900963) Arabian Sea were used to study the variations of the Indian monsoon during previous climatic cycles. Core TY93-929/P was located between the SW monsoon driven upwelling centres off Somalia and Oman, which are characterized by large seasonal sea surface temperature (SST) and particle flux changes. By contrast, core MD900963, was situated near the Maldives platform, an equatorial ocean site with a rather...

Ice-rafted debris, geochemistry and stable oxygen isotope record of sediment core MD99-2277, supplement to: Helmke, Jan Peter; Bauch, Henning A; Mazaud, Alain (2003): Evidence for a mid-Pleistocene shift of ice-drift pattern in the Nordic seas. Journal of Quaternary Science, 18(2), 183-191

Jan Peter Helmke, Henning A Bauch & Alain Mazaud
Sediment proxy records from a continuous, 1.5 million year long deep-sea sediment core from a site in the western Norwegian Sea were used to obtain new insights into the nature of palaeoceanographic change in the northern North Atlantic (Nordic seas) during the climatic shift of the Mid-Pleistocene Revolution (MPR). Red-green sediment colour and magnetic susceptibility records both reveal significant differences in their mean values when comparing the intervals older than 700 000 yr (700 ka)...

Geochemistry and radiolarian distribution of sediment core MD96-2073, supplement to: Jacot des Combes, Hélène; Caulet, Jean-Pierre; Tribovillard, Nicolas (2005): Monitoring the variations of the Socotra upwelling system during the last 250 kyr: a biogenic and geochemical approach. Palaeogeography, Palaeoclimatology, Palaeoecology, 223(3-4), 243-259

Hélène Jacot des Combes, Jean-Pierre Caulet & Nicolas Tribovillard
A combination of changes in the species composition of the radiolarian populations, and in the sediment chemical composition (content and mass accumulation rates of carbonate, organic carbon, and selected major and trace elements, with special attention paid to Ba) is used to reconstruct the variations in upwelling activity over the last 250 kyr in the Socotra gyre area (Somali-Socotra upwelling system, NW Indian Ocean).In the Socotra gyre (Core MD 962073 at 10°N), the variations in...

Age determination and stable carbon oxygen isotopes of sediment core MD99-2334, supplement to: Skinner, Luke C; Shackleton, Nicholas J (2004): Rapid transient changes in northeast Atlantic deep water ventilation age across Termination I. Paleoceanography, 19(2), PA2005

Luke C Skinner & Nicholas J Shackleton
A sequence of accelerator mass spectrometry (AMS) 14C dates performed on benthic and planktonic foraminifera from a northeast Atlantic deep-sea core (MD99-2334K; 37°48'N, 10°10'W; 3146 m) permit the reconstruction of deep water “14C ventilation ages” across the last deglaciation. The records from MD99-2334K have been placed on the GISP2 timescale via the synchrony of temperature changes recorded in the Greenland ice cores and in North Atlantic planktonic delta18O(cc) (calcite delta18O). On the basis of a...

Palynology of sediment core MD01-2378, supplement to: Kawamura, Hiroshi; Holbourn, Ann; Kuhnt, Wolfgang (2006): Climate variability and land–ocean interactions in the Indo Pacific Warm Pool: A 460-ka palynological and organic geochemical record from the Timor Sea. Marine Micropaleontology, 59(1), 1-14

Hiroshi Kawamura, Ann Holbourn & Wolfgang Kuhnt
Climatic conditions in the western Timor Sea and the adjacent northwestern part of Australia are reconstructed for the last 460 ka, based on geochemical and palynological proxy records of paleoproductivity and land vegetation (precipitation) from IMAGES Core MD01-2378. Reduced precipitation and elevated productivity characterize glacial stages, whereas enhanced precipitation and reduced productivity are typical of interglacial stages. A long-term reduction in precipitation over the last 320 ka occurred in two steps at approximately 300 ka...

Stable oxygen isotope record and terrigenous components of sediment core MD96-2094, supplement to: Stuut, Jan-Berend W; Prins, Maarten A; Schneider, Ralph R; Weltje, Gert Jan; Jansen, J H Fred; Postma, George (2002): A 300-kyr record of aridity and wind strength in southwestern Africa: inferences from grain-size distributions of sediments on Walvis Ridge, SE Atlantic. Marine Geology, 180(1-4), 221-233

Jan-Berend W Stuut, Maarten A Prins, Ralph R Schneider, Gert Jan Weltje, J H Fred Jansen & George Postma
The terrigenous fraction of sediments recovered from Walvis Ridge, SE Atlantic Ocean, reveals a history of southwestern African climate of the last 300 kyr. End-member modelling of a data set of grain-size distributions (n=428) results in three end members. The two coarsest end members are interpreted as eolian dust, the third end member as hemipelagic mud. The ratio of the two eolian end members reflects the eolian grain size and is attributed to the intensity...

Sea surface reconstruction of sediment cores off West Spitsbergen, supplement to: Hald, Morten; Ebbesen, Hanne; Forwick, Matthias; Godtliebsen, Fred; Khomenko, Liza; Korsun, Sergei; Ringstad Olsen, Lena; Vorren, Tore O (2004): Holocene paleoceanography and glacial history of the West Spitzbergen area, Euro-Arctic margin. Quaternary Science Reviews, 23(20-21), 2075-2088

Morten Hald, Hanne Ebbesen, Matthias Forwick, Fred Godtliebsen, Liza Khomenko, Sergei Korsun, Lena Ringstad Olsen & Tore O Vorren
Two sediment cores from the West Spitsbergen area, Euro-Arctic margin, MD99-2304 and MD99-2305, have been investigated for paleoceanographic proxies, including benthic and planktonic foraminifera, benthic foraminiferal stable isotopes and ice rafted debris. Core MD99-2304 is located on the upper continental margin, reflecting variations in the influx of Atlantic Water in the West Spitsbergen Current. Core MD99-2305 is located in Van Mijenfjord, picturing variations in tidewater glacier activity as well as fjord-ocean circulation changes. Surface water...

Tephrostratigraphy and major element concentrations in glass shards of sediment core MD90-917, supplement to: Siani, Giuseppe; Sulpizio, Roberto; Paterne, Martine; Sbrana, Alessandro (2004): Tephrostratigraphy study for the last 18,000 14C years in a deep-sea sediment sequence for the South Adriatic. Quaternary Science Reviews, 23(23-24), 2485-2500

Giuseppe Siani, Roberto Sulpizio, Martine Paterne & Alessandro Sbrana
A detailed tephrostratigraphy supported by accelerator mass spectrometry (AMS) 14C dating and isotopic and geochemical analyses has been carried out for a deep-sea core collected from the Southern Adriatic Sea, which spans the last 18 14C kyr. Fourteen ash layers have been recognized in the marine core and the origin was determined by comparing their age and geochemistry with tephra detected in terrestrial deposits. The geochemical signatures of marine ash layers indicate a prevailing Campanian...

Expanded GHOST database, supplement to: Leduc, Guillaume; Schneider, Ralph R; Kim, Jung-Hyun; Lohmann, Gerrit (2010): Holocene and Eemian Sea surface temperature trends as revealed by alkenone and Mg/Ca paleothermometry. Quaternary Science Reviews, 29(7-8), 989-1004

Guillaume Leduc, Ralph R Schneider, Jung-Hyun Kim & Gerrit Lohmann
In this study we review a global set of alkenone- and foraminiferal Mg/Ca-derived sea surface temperatures (SST) records from the Holocene and compare them with a suite of published Eemian SST records based on the same approach. For the Holocene, the alkenone SST records belong to the actualized GHOST database (Kim, J.-H., Schneider R.R., 2004). The actualized GHOST database not only confirms the SST changes previously described but also documents the Holocene temperature evolution in...

Stable isotope record and lithic fragments distribution in sediments of MIS9-14 of the North Atlantic, supplement to: Voelker, Antje H L; Rodrigues, Teresa; Billups, Katharina; Oppo, Delia W; McManus, Jerry F; Stein, Ruediger; Hefter, Jens; Grimalt, Joan O (2010): Variations in mid-latitude North Atlantic surface water properties during the mid-Brunhes (MIS 9-14) and their implications for the thermohaline circulation. Climate of the Past, 6(4), 531-552

Antje H L Voelker, Teresa Rodrigues, Katharina Billups, Delia W Oppo, Jerry F McManus, Ruediger Stein, Jens Hefter & Joan O Grimalt
Stable isotope and ice-rafted debris records from three core sites in the mid-latitude North Atlantic (IODP Site U1313, MD01-2446, MD03-2699) are combined with records of ODP Sites 1056/1058 and 980 to reconstruct hydrographic conditions during the middle Pleistocene spanning Marine Isotope Stages (MIS) 9-14 (300-540 ka). Core MD03-2699 is the first high-resolution mid-Brunhes record from the North Atlantic's eastern boundary upwelling system covering the complete MIS 11c interval and MIS 13. The array of sites...

Sea surface temperature and export productivity reconstructions of sediments off the western Iberian margin, supplement to: Salgueiro, Emilia; Voelker, Antje H L; de Abreu, Lucia; Abrantes, Fatima F; Meggers, Helge; Wefer, Gerold (2010): Temperature and productivity changes off the western Iberian margin during the last 150 ky. Quaternary Science Reviews, 29(5-6), 680-695

Emilia Salgueiro, Antje H L Voelker, Lucia de Abreu, Fatima F Abrantes, Helge Meggers & Gerold Wefer
Present day hydrographic conditions along the western Iberian margin are characterized by seasonal upwelling with filaments that can penetrate more than 200 km into the open ocean and constitute areas of cold and highly productive waters. In order to investigate spatial and temporal gradients in temperature and productivity conditions during the last 150 ky, high-resolution proxy records were generated in 3 cores (SU92-03, MD95-2040, MD95-2042), located along the Iberian coast between 43°12'N and 37°48'N and...

Analytical results from sediment core MD03-2698, supplement to: Lebreiro, Susana Martin; Voelker, Antje H L; Vizcaino, Alexis; Abrantes, Fatima F; Alt-Epping, Ulrich; Jung, S; Thouveny, Nicolas; Gràcia, Eulàlia (2009): Sediment instability on the Portuguese continental margin under abrupt glacial climate changes (last 60 kyr). Quaternary Science Reviews, 28(27-28), 3211-3223

Susana Martin Lebreiro, Antje H L Voelker, Alexis Vizcaino, Fatima F Abrantes, Ulrich Alt-Epping, S Jung, Nicolas Thouveny & Eulàlia Gràcia
It is well established that orbital scale sea-level changes generated larger transport of sediments into the deep-sea during the last glacial maximum than the Holocene. However, the response of sedimentary processes to abrupt millennial-scale climate variability is rather unknown. Frequency of distal turbidites and amounts of advected detrital carbonate are estimated off the Lisbon-Setúbal canyons, within a chronostratigraphy based on radiometric ages, oxygen isotopes and paleomagnetic key global anomalies. We found that:1) Higher frequency of...

Deep-water temperature reconstruction of sediment core MD99-2334, supplement to: Skinner, Luke C; Shackleton, Nicholas J; Elderfield, Henry (2003): Millennial-scale variability of deep-water temperature and d18Odw indicating deep-water source variations in the Northeast Atlantic, 0-34 cal. ka BP. Geochemistry, Geophysics, Geosystems, 4(12)

Luke C Skinner, Nicholas J Shackleton & Henry Elderfield
Paired measurements of Mg/Ca and delta18O(cc) (calcite delta18O) in benthic foraminifera from a deep-sea core recovered on the Iberian Margin (MD99-2334K; 37°48'N, 10°10'W; 3,146 m) have been performed in parallel with planktonic delta18O(cc) analyses and counts of ice-rafted debris (IRD). The synchrony of temperature changes recorded in the Greenland ice cores and in North Atlantic planktonic delta18O(cc) allows the proxy records from MD99-2334K to be placed confidently on the GISP2 time-scale. This correlation is further...

Paleoceanography on sediment core MD01-2416, supplement to: Sarnthein, Michael; Gebhardt, Holger; Kiefer, Thorsten; Kucera, Michal; Cook, M; Erlenkeuser, Helmut (2004): Mid Holocene origin of the sea surface salinity low in the Subarctic North Pacific. Quaternary Science Reviews, 23(20-22), 2089-2099

Michael Sarnthein, Holger Gebhardt, Thorsten Kiefer, Michal Kucera, M Cook & Helmut Erlenkeuser
IMAGES core MD01-2416 (51°N, 168°E) provides the first centennial-scale multiproxy record of Holocene variation in North Pacific sea-surface temperature (SST), salinity, and biogenic productivity. Our results reveal a gradual decrease in subarctic SST by 3-5 °C from 11.1 to 4.2 ka and a stepwise long-term decrease in sea surface salinity (SSS) by 2-3 p.s.u. Early Holocene SSS were as high as in the modern subtropical Pacific. The steep halocline and stratification that is characteristic of...

Stable isotope and Mg/Ca record of Globigerinoides ruger morphotypes, supplement to: Steinke, Stephan; Chiu, Han-Yi; Yu, Pai-Sen; Shen, Chuan Chou; Löwemark, Ludvig; Mii, Horng-Sheng; Chen, Min-Te (2005): Mg/Ca ratios of two Globigerinoides ruber (white) morphotypes: Implications for reconstructing past tropical/subtropical surface water conditions. Geochemistry, Geophysics, Geosystems, 6, Q11005

Stephan Steinke, Han-Yi Chiu, Pai-Sen Yu, Chuan Chou Shen, Ludvig Löwemark, Horng-Sheng Mii & Min-Te Chen
Tests of the planktonic foraminifer Globigerinoides ruber (white; d'Orbigny) have become a standard tool for reconstructing past oceanic environments. Paleoceanographers often utilize the Mg/Ca ratios of the foraminiferal tests for reconstructing low-latitude ocean glacial-interglacial changes in sea surface temperatures (SST). We report herein a comparison of Mg/Ca measurements on sample pairs (n = 20) of two G. ruber (white) morphotypes (G. ruber sensu stricto (s.s.) and G. ruber sensu lato (s.l.)) from surface and downcore...

Oxygen isotope and Mg/Ca record of planktonic foraminifera of sediment core MD01-2390, supplement to: Steinke, Stephan; Chiu, Han-Yi; Yu, Pai-Sen; Shen, Chuan Chou; Erlenkeuser, Helmut; Löwemark, Ludvig; Chen, Min-Te (2006): On the influence of sea level and monsoon climate on the southern South China Sea freshwater budget over the last 22,000 years. Quaternary Science Reviews, 25(13-14), 1475-1488

Stephan Steinke, Han-Yi Chiu, Pai-Sen Yu, Chuan Chou Shen, Helmut Erlenkeuser, Ludvig Löwemark & Min-Te Chen
Changes in the local freshwater budget over the last 22,000 years have been estimated from a sediment core located in the southern South China Sea (SCS) using a combined approach of Mg/Ca and oxygen isotopes on the planktonic foraminifera Globigerinoides ruber (white) sensu stricto (s.s.). Core MD01-2390 (06°28,12N, 113°24,56E; water depth 1591 m) is located near the glacial paleo-river mouths of the Baram, Rajang and North Sunda/Molengraaff Rivers that drained the exposed Sunda Shelf. The...

Stable isotope record of planktonic foraminifera from the western Iberian margin during marine isotope stage 2, supplement to: Voelker, Antje H L; de Abreu, Lucia; Schönfeld, Joachim; Erlenkeuser, Helmut; Abrantes, Fatima F (2009): Hydrographic conditions along the western Iberian margin during marine isotope stage 2. Geochemistry, Geophysics, Geosystems, 10, Q12U08

Antje H L Voelker, Lucia de Abreu, Joachim Schönfeld, Helmut Erlenkeuser & Fatima F Abrantes
The surface water hydrography along the western Iberian margin, as part of the North Atlantic's eastern boundary upwelling system, consists of a complex, seasonally variable system of equatorward and poleward surface and subsurface currents and seasonal upwelling. Not much information exists to ascertain if the modern current and productivity patterns subsisted under glacial climate conditions, such as during marine isotope stage (MIS) 2, and how North Atlantic meltwater events, especially Heinrich events, affected them. To...

Sedimentology of the Okhotsk Sea, supplement to: Nürnberg, Dirk; Tiedemann, Ralf (2004): Environmental change in the Sea of Okhotsk during the last 1.1 million years. Paleoceanography, 19(4), PA4011

Dirk Nürnberg & Ralf Tiedemann
On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record (China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure...

Stable isotope record of planktonic foraminifera from sediment core MD96-2085, supplement to: Chen, Min-Te; Chang, Yuan-Pin; Chang, Cheng-Chieh; Wang, Li-Wen; Wang, Chung-Ho; Yu, Ein-Fen (2002): Late Quaternary sea-surface temperature variations in the southeast Atlantic: a planktic foraminifer faunal record of the past 600 000 yr (IMAGES II MD962085). Marine Geology, 180(1-4), 163-181

Min-Te Chen, Yuan-Pin Chang, Cheng-Chieh Chang, Liping Wang, Chung-Ho Wang & Ein-Fen Yu
A high-resolution (~4-5cm/kyr) giant piston core record (MD962085) retrieved during an IMAGES II-NAUSICAA cruise from the continental slope of the southeast Atlantic Ocean reveals striking variations in planktonic foraminifer faunal abundances and sea-surface temperatures (SST) during the past 600 000 yr. The location and high-quality sedimentary record of the core provide a good opportunity to assess the variability of the Benguela Current system and associated important features of the ocean-climate system in the southeast Atlantic....

Age determination and paleotemperatures of sediment core MD95-2043 in the Alboran Sea, supplement to: Cacho, Isabel; Grimalt, Joan O; Pelejero, Carles; Canals, Miquel; Sierro, Francisco Javier; Flores, José-Abel; Shackleton, Nicholas J (1999): Dansgaard-Oeschger and Heinrich event imprints in the Alboran Sea paleotemperature record. Paleoceanography, 14(6), 698-705

Isabel Cacho, Joan O Grimalt, Carles Pelejero, Miquel Canals, Francisco Javier Sierro, José-Abel Flores & Nicholas J Shackleton
Past sea surface temperature (SST) evolution in the Alboran Sea (western Mediterranean) during the last 50,000 years has been inferred from the study of C37 alkenones in International Marine Global Change Studies MD952043 core. This record has a time resolution of ~200 years allowing the study of millennial-scale and even shorter climatic changes. The observed SST curve displays characteristic sequences of extremely rapid warming and cooling events along the glacial period. Comparison of this Alboran...

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  • 2010
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