899 Works

High-resolution organic-geochemical and sedimentological data of sediment core PS2837-5, supplement to: Birgel, Daniel; Hass, H Christian (2004): Oceanic and atmospheric variations during the last deglaciation in the Fram Strait (Arctic Ocean): a coupled high-resolution organic-geochemical and sedimentological study. Quaternary Science Reviews, 23(1-2), 29-47

Daniel Birgel & H Christian Hass
From a high sedimentation rate core, obtained from the Yermak slope (Arctic Ocean), we deduced short-term climatic fluctuations of the last deglaciation lasting from 17,000 to 9,000 years BP. By using a coupled organic-geochemical and sedimentological approach, we reconstructed near-bottom current conditions and assessed their significance in relation with comparable global thermohaline circulation patterns and surface water conditions. Highest concentrations and fluctuations of specific marine phytoplankton biomarkers were obtained in the Bølling-Allerød, when the major...

Benthic foraminifera in the marginal Arctic Ocean, supplement to: Wollenburg, Jutta E; Knies, Jochen; Mackensen, Andreas (2004): High-resolution palaeoproductivity fluctuations during the past 24 kyr as indicated by benthic foraminifera in the marginal Arctic Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 204(3-4), 209-238

Jutta E Wollenburg, Jochen Knies & Andreas Mackensen
Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show that paleoproductivity was reduced to about a third of its present level during peak glacial stadials. These reduced values are still higher than values for modern, permanently ice-covered regions, suggesting that the core locations were at least partially...

Standing stocks and carbon isotopes of live benthic foraminifera from the South Atlantic, supplement to: Mackensen, Andreas; Licari, Laetitia (2004): Carbon isotopes of live benthic foraminifera from the South Atlantic: Sensitivity to bottom water carbonate saturation state and organic matter rain rates. In: Wefer, G; Mulitza, S & Ratmeyer, V (eds.), The South Atlantic in the Late Quaternary: Reconstruction of Material Budgets and Current Systems, Springer, Berlin, Heidelberg, New York, 623-644

Andreas Mackensen & Laetitia Licari
Live (Rose Bengal stained) and dead benthic foraminifera of surface and subsurface sediments from 25 stations in the eastern South Atlantic Ocean and the Atlantic sector of the Southern Ocean were analyzed to decipher a potential influence of seasonally and spatially varying high primary productivity on the stable carbon isotopic composition of foraminiferal tests. Therefore, stations were chosen so that productivity strongly varied, whereas conservative water mass properties changed only little. To define the stable...

Distribution, variability and burial of organic carbon at Northern Fram Strait and Yermak Plateau, supplement to: Birgel, Daniel; Stein, Ruediger (2004): Northern Fram Strait and Yermak Plateau: distribution, variability and burial of organic carbon and paleoenvironmental implications. In: Stein, R & Macdonald, R W (eds.), The Organic Carbon Cycle in the Arctic Ocean, Springer Verlag, Berlin, Heidelberg, New York, 279-294

Daniel Birgel & Ruediger Stein
The environment of the Fram Strait, the only deepwater connection of the Arctic Ocean to the world oceans via the North Atlantic (Fig.7.8.1; see Fig.7.1.9), is influenced by the distribution of sea-ice and two opposing current systems. The northward flowing West Spitsbergen Current (WSC) transports warm, near-surface water (Manley 1995; Rudels et al. 2000) to the Northern Fram Strait. About 22% of the northward flowing Atlantic waters are re-circulated within the RAC (Return Atlantic Current)...

Downhole logging data of Hole PRGL2-2 from PROMESS1 Cruise

Ralf Gelfort & Tina Schoolmeester

Downhole logging data of Hole PRAD2-4 from PROMESS1 Cruise

Ralf Gelfort & Tina Schoolmeester

Downhole logging data of Hole PRAD1-2 from PROMESS1 Cruise

Ralf Gelfort & Tina Schoolmeester

Caliper downhole log of Hole PRAD1-1 from PROMESS1 Cruise

Ralf Gelfort & Tina Schoolmeester

Physical properties measurements with GEOTEK Multi-Sensor Core Logger of Hole PRGL1-5 from PROMESS1 Cruise

Bernard Dennielou & Gilbert Floch

Coccolithophores and calcareous nannofossils abundance in Hole PRGL1-4 from PROMESS1 Cruise

Elena Colmenero-Hidalgo & José-Abel Flores

Water content and shear strength of Hole PRGL1-5 from PROMESS1 Cruise

Nabil Sultan & Shipboard Scientific Party

Les forêts: témoins des besoins du passé et espaces de développement futur

Franz Josef Schmithüsen
Document de travail / Chaire de Politique et Economie Forestière, Département des Sciences Environmentales. Série internationale, 2004 (5)

I patriziati in Ticino - analisi di alcuni casi con riferimento al ruolo, l'organizzazione e i problemi legati alla gestione del territorio

Mark Bertogliati, Franz Josef Schmithüsen & Fulvio Giudici
Working papers / Forest Policy and Forest Economics Department of Forest Sciences. International series, 2004 (8)

Common forest legislation issues in European countries: reforestation obligations, public access and use of non-wood forest products

Josephine Bauer
Working papers / Forest Policy and Forest Economics Department of Forest Sciences. International series, 2004 (7)

Comparative analysis of forest laws in 12 sub-Saharan African countries

Volker Kohler & Franz Josef Schmithüsen
Working papers / Forest Policy and Forest Economics Department of Forest Sciences. International series, 2004 (6)

Stable oxygen and carbon isotope composition of benthic foraminifera from the western Mediterranean Sea, supplement to: Schmiedl, Gerhard; Pfeilsticker, M; Hemleben, Christoph; Mackensen, Andreas (2004): Environmental and biological effects on the stable isotope composition of recent deep-sea benthic foraminifera from the western Mediterranean Sea. Marine Micropaleontology, 51(1-2), 129-152

Gerhard Schmiedl, M Pfeilsticker, Christoph Hemleben & Andreas Mackensen
The influence of microhabitat, organic matter flux, and metabolism on the stable oxygen and carbon isotope composition of live (Rose Bengal stained) and dead (empty tests) deep-sea benthic foraminifera from the Gulf of Lions (western Mediterranean Sea) have been studied. The total range of observed foraminiferal isotope values exceeds 1.0 per mil for d18O and 2.2 per mil for d13C demonstrating a wide range of coexisting disequilibria relative to d18O of equilibrium calcite (d18OEQ) and...

Stable isotopes, sedimentology and geochemical analyses of Middle Eocene to early Miocene sediments of ODP Site 177-1090, supplement to: Diekmann, Bernhard; Kuhn, Gerhard; Gersonde, Rainer; Mackensen, Andreas (2004): Middle Eocene to early Miocene environmental changes in the sub-Antarctic Southern Ocean: evidence from biogenic and terrigenous depositional patterns at ODP Site 1090. Global and Planetary Change, 40(3-4), 295-313

Bernhard Diekmann, Gerhard Kuhn, Rainer Gersonde & Andreas Mackensen
During Leg 177 of the Ocean Drilling Program (ODP), a well-preserved middle Eocene to lower Miocene sediment record was recovered at Site 1090 on the Agulhas Ridge in the Atlantic sector of the Southern Ocean. This new sediment record shows evidence of a hitherto unknown late Eocene opal pulse. Lithological variations, compositional data, mass-accumulation rates of biogenic and lithogenic sediment constituents, grain-size distributions, geochemistry, and clay mineralogy are used to gain insights into mid-Cenozoic environmental...

Data from the EPICA Dome C ice core EDC, supplement to: Augustin, Laurent; Barbante, Carlo; Barnes, Piers R F; Barnola, Jean-Marc; Bigler, Matthias; Castellano, Emiliano; Cattani, Olivier; Chappellaz, Jérôme A; Dahl-Jensen, Dorthe; Delmonte, Barbara; Dreyfus, Gabrielle; Durand, Gael; Falourd, Sonia; Fischer, Hubertus; Flückiger, Jacqueline; Hansson, Margareta E; Huybrechts, Philippe; Jugie, Gérard; Johnsen, Sigfus J; Jouzel, Jean; Kaufmann, Patrik R; Kipfstuhl, Sepp; Lambert, Fabrice; Lipenkov, Vladimir Y; Littot, Geneviève C; Longinelli, Antonio; Lorrain, Reginald D; Maggi, Valter; Masson-Delmotte, Valerie; Miller, Heinz; Mulvaney, Robert; Oerlemans, Johannes; Oerter, Hans; Orombelli, Giuseppe; Parrenin, Frédéric; Peel, David A; Petit, Jean-Robert; Raynaud, Dominique; Ritz, Catherine; Ruth, Urs; Schwander, Jakob; Siegenthaler, Urs; Souchez, Roland; Stauffer, Bernhard; Steffensen, Jørgen Peder; Stenni, Barbara; Stocker, Thomas F; Tabacco, Ignazio; Udisti, Roberto; van de Wal, Roderik S W; van den Broeke, Michiel R; Wilhelms, Frank; Winther, Jan-Gunnar; Wolff, Eric W; Zucchelli, Mario (2004): Eight glacial cycles from an Antarctic ice core. Nature, 429(6992), 623-628

Laurent Augustin, Carlo Barbante, Piers R F Barnes, Jean-Marc Barnola, Matthias Bigler, Emiliano Castellano, Olivier Cattani, Jérôme A Chappellaz, Dorthe Dahl-Jensen, Barbara Delmonte, Gabrielle Dreyfus, Gael Durand, Sonia Falourd, Hubertus Fischer, Jacqueline Flückiger, Margareta E Hansson, Philippe Huybrechts, Gérard Jugie, Sigfus J Johnsen, Jean Jouzel, Patrik R Kaufmann, Sepp Kipfstuhl, Fabrice Lambert, Vladimir Y Lipenkov, Geneviève C Littot … & Mario Zucchelli
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate variability was smaller before that time, but such records are often poorly resolved. Moreover, it is not possible to infer the abundance of greenhouse gases in the atmosphere from marine records. Here we report the recovery of a deep ice core from Dome C, Antarctica,...

First results from stable-istope measurements on ice cores from Dronning Maud Land, supplement to: Oerter, Hans; Graf, Wolfgang; Meyer, Hanno; Wilhelms, Frank (2004): The EPICA ice core from Dronning Maud Land: first results from stable-istope measurements. Annals of Glaciology, 39, 307-312

Hans Oerter, Wolfgang Graf, Hanno Meyer & Frank Wilhelms
The European Project for Ice Coring in Antarctica (EPICA) focuses on the drilling of two deep ice cores, the first at Dome C and the second at Kohnen station (75°00' S, 0°04' E) in Dronning Maud Land (DML). This paper deals with stable-isotope records from ice cores drilled in DML. In the first season, the deep EPICA DML core reached a depth of 450 m, recovering ice approximately 7000 years old. Generally, the d18O record...

Ground-based electromagnetic (EM) and drill-hole ice and snow thickness measurements during Polarstern cruise ARK-XVII/2 in 2001, supplement to: Haas, Christian (2004): Late-summer sea ice thickness variability in the Arctic Transpolar Drift 1991-2001 derived from ground-based electromagnetic sounding. Geophysical Research Letters, 31, L09402

Christian Haas
Late-summer thickness distributions of large ice floes in the Transpolar Drift between Svalbard and the North Pole in 1991, 1996, 1998, and 2001 are compared. They have been derived from drilling and electromagnetic (EM) sounding. Results show a strong interannual variability, with significantly reduced thickness in 1998 and 2001. The mean thickness decreased by 22.5% from 3.11 m in 1991 to 2.41 m in 2001, and the modal thickness by 22% from 2.50 m in...

Aliphatic lipids in recent sediments of the Fram Strait/Yermak Plateau (Arctic Ocean), supplement to: Birgel, Daniel; Stein, Ruediger; Hefter, Jens (2004): Aliphatic lipids in recent sediments of the Fram Strait/Yermak Plateau (Arctic Ocean): composition, sources and transport processes. Marine Chemistry, 88(3-4), 127-160

Daniel Birgel, Ruediger Stein & Jens Hefter
Surface sediments (n=39) from the western Fram Strait and across the Yermak Plateau (Arctic Ocean) were investigated by molecular and isotopic organic geochemical methods to determine the composition, distribution and origin of extractable aliphatic lipids (n-alkanes, n-alkanols, fatty acids). Bulk geochemical parameters (TOC-content, d13Corg) were also determined, including additional samples nearby. Enhanced organic carbon contents of up to 1.6% along the western slope of the Yermak Plateau and north off Spitsbergen, corroborated by an average...

Age models, iron intensity, magnetic susceptibility records and dry bulk density of sediment cores from around the Canary Islands, supplement to: Kuhlmann, Holger; Freudenthal, Tim; Helmke, Peer; Meggers, Helge (2004): Reconstruction of paleoceanography off NW Africa during the last 40,000 years: influence of local and regional factors on sediment accumulation. Marine Geology, 207(1-4), 209-224

Holger Kuhlmann, Tim Freudenthal, Peer Helmke & Helge Meggers
A set of 43 sediment cores from around the Canary Islands is used to characterise this region, which intersects meridional climatic regimes and zonal productivity gradients in a high spatial resolution. Using rapid and nondestructive core logging techniques we carried out Fe intensity and magnetic susceptibility (MS) measurements and created a stack on the basis of five stratigraphic reference cores, for which a stratigraphic age model was available from d18O and 14C analyses on planktonic...

Iron intensity, magnetic susceptibility records and dry bulk density of sediment core GeoB4240-2

Holger Kuhlmann, Tim Freudenthal, Peer Helmke & Helge Meggers

Iron intensity, magnetic susceptibility records and dry bulk density of sediment core GeoB4237-2

Holger Kuhlmann, Tim Freudenthal, Peer Helmke & Helge Meggers

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