973 Works

Stable isotope record and aklenonen index of MIS 11 sediments, supplement to: Dickson, Alexander J; Beer, Christopher J; Dempsey, Ciara; Maslin, Mark A; Bendle, James A; McClymont, Erin L; Pancost, Richard D (2009): Oceanic forcing of the Marine Isotope Stage 11 interglacial. Nature Geoscience, 2, 428-433

Alexander J Dickson, Christopher J Beer, Ciara Dempsey, Mark A Maslin, James A Bendle, Erin L McClymont & Richard D Pancost
The interglacial known as Marine Isotope Stage 11 has been proposed to be analogous to the Holocene, owing to similarities in the amplitudes of orbital forcing. It has been difficult to compare the periods, however, because of the long duration of Stage 11 and a lack of detailed knowledge of any extreme climate events that may have occurred. Here we use the distinctive phasing between seasurface temperatures and the oxygen-isotope records of benthic foraminifera in...

Vertical microalgae fluxes at the mooring station LOMO-2 over the Lomonosov Ridge in the period from September 15, 1995 till August 16, 1996, supplement to: Zernova, Valentina V; Nöthig, Eva-Maria; Shevchenko, Vladimir P (2000): Vertical microalga flux in the northern Laptev Sea (from the data collected by the yearlong sediment trap). Translated from Okeanologiya, 2000, 40(6), 850-858, Oceanology, 40(6), 801-808

Valentina V Zernova, Eva-Maria Nöthig & Vladimir P Shevchenko
The first studies of microalgae fluxes over the Lomonosov Ridge in the northern Laptev Sea were carried out with a sediment trap at the year-long mooring station LOMO-2, installed at 150 m depth from September 15, 1995 to August 16, 1996. These studies demonstrated essential seasonal variations of vertical microalgae flux. It was shown that in summer diverse flora (composed mainly of cryophylic diatoms) growed intensively beneath the permanent ice cover. Strongly pronounced seasonal variations...

Geochemistry of ODP Site 125-786 volcanic rocks, supplement to: Murton, Bramley J; Peate, David W; Arculus, Richard J; Pearce, Julian A; van der Laan, Sieger R (1992): Trace-element geochemistry of volcanic rocks from Site 786: the Izu-Bonin Forearc. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 211-235

Bramley J Murton, David W Peate, Richard J Arculus, Julian A Pearce & Sieger R van der Laan
Eocene-Oligocene volcanic rocks drilled at Site 786 in the Izu-Bonin forearc cover a wide range of compositions from primitive boninites to highly evolved rhyolites. K-Ar dating reveals at least two distinct episodes of magmatism; one at 41 Ma and a later one at 35 Ma. The early episode produced low-Ca boninites and bronzite andesites that form an oceanic basement of pillow lavas and composite intrusive sheets, overlain by flows and intrusive sheets of intermediate-Ca boninites...

Geochemistry and isotopic ratios of boninites and related rocks of the Izu-Bonin Forearc, supplement to: Pearce, Julian A; Thirlwall, Matthew F; Ingram, Gerry; Murton, Bramley J; Arculus, Richard J; van der Laan, Sieger R (1992): Isotopic evidence for the origin of Boninites and related rocks drilled in the Izu-Bonin (Osagawara) Forearc, Leg 125. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 237-261

Julian A Pearce, Matthew F Thirlwall, Gerry Ingram, Bramley J Murton, Richard J Arculus & Sieger R van der Laan
Twenty-six samples representing the wide range of lithologies (low- and intermediate-Ca boninites and bronzite andesites, high-Ca boninites, basaltic andesites-rhyolites) drilled during Leg 125 at Sites 782 and 786 on the Izu-Bonin outer-arc high have been analyzed for Sr, Nd, and Pb isotopes. Nd-Sr isotope covariations show that most samples follow a trend parallel to a line from Pacific MORB mantle (PMM) to Pacific Volcanogenic sediment (PVS) but displaced slightly toward more radiogenic Sr. Pb isotope...

Geochemistry of igneous rock samples of ODP Site 125-786, supplement to: Arculus, Richard J; Pearce, Julian A; Murton, Bramley J; van der Laan, Sieger R (1992): Igneous stratigraphy and major element geochemistry of Holes 786A and 786B. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 143-169

Richard J Arculus, Julian A Pearce, Bramley J Murton & Sieger R van der Laan
A morphologically complex igneous basement was penetrated at Leg 125 Site 786 beneath approximately 100 m of Eocene-Pleistocene sediments at 31°52.45 'N, 141°13.59'E in a 3082-m water depth. The site is located on the forearc basement high (FBH) of the Izu-Bonin (Ogasawara) Arc. In the broadest terms, the sequence in Hole 786B consists of a basal sheeted dike complex, heavily mineralized in places, with overlying pillow lavas giving way to a complex and repeated sequence...

Geochemistry of Pleistocene volcanic rocks in the Mariana Forearc, supplement to: Marlow, Michael S; Johnson, Lynn E; Pearce, Julian A; Fryer, Patricia B; Pickthorn, Ledabeth G; Murton, Bramley J (1992): Pleistocene volcanic rocks in the Mariana Forearc revealed by drilling at Site 781. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 293-310

Michael S Marlow, Lynn E Johnson, Julian A Pearce, Patricia B Fryer, Ledabeth G Pickthorn & Bramley J Murton
Geophysical surveys of the Mariana forearc, in an area equidistant from the Mariana Trench and the active Mariana Island Arc, revealed a 40-m-deep graben about 13 km northwest of Conical Seamount, a serpentine mud volcano. The graben and its bounding horst blocks are part of a fault zone that strikes northwest-southeast beneath Conical Seamount. One horst block was drilled during Leg 125 of the Ocean Drilling Program (Site 781).Three lithologic units were recovered at Site...

Geochemistry of boninite and harzburgite of ODP Leg 125 basement samples, supplement to: Pearce, Julian A; van der Laan, Sieger R; Arculus, Richard J; Murton, Bramley J; Ishii, Teruaki; Peate, David W; Parkinson, Ian J (1992): Boninite and Harzburgite from Leg 125 (Bonin-Mariana Forearc): a case Study of magma genesis during the initial stages of subduction. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 623-659

Julian A Pearce, Sieger R van der Laan, Richard J Arculus, Bramley J Murton, Teruaki Ishii, David W Peate & Ian J Parkinson
Holes drilled into the volcanic and ultrabasic basement of the Izu-Ogasawara and Mariana forearc terranes during Leg 125 provide data on some of the earliest lithosphere created after the start of Eocene subduction in the Western Pacific. The volcanic basement contains three boninite series and one tholeiite series. (1) Eocene low-Ca boninite and low-Ca bronzite andesite pillow lavas and dikes dominate the lowermost part of the deep crustal section through the outer-arc high at Site...

Petrology and geochemistry of the basement boninite series of ODP Site 125-786, supplement to: van der Laan, Sieger R; Arculus, Richard J; Pearce, Julian A; Murton, Bramley J (1992): Petrography, mineral chemistry, and phase relations of the basement Boninite series of Site 786, Izu-Bonin Forearc. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 171-201

Sieger R van der Laan, Richard J Arculus, Julian A Pearce & Bramley J Murton
The 720 m of igneous basement that was penetrated at Site 786 of Ocean Drilling Program Leg 125 consists of boninite-series volcanics. Bronzite andesites dominate the lithology and primitive magmas of high-Ca, intermediate-Ca, and low-Ca boninite are present in subordinate amounts. Sparsely phyric boninites typically contain olivine and orthopyroxene phenocrysts with Mg numbers [= Mg/(Mg + Fe) in moles] between 86% and 87%. Their high whole-rock Mg numbers, and the absence of zonation in the...

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, Stephen 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...

Age determination of Paleogene sediments from the Prysz Bay, supplement to: Thierstein, Hans R; MacDougall, J Douglas; Martin, Ellen E; Larsen, Birger; Barron, John A; Baldauf, Jack G (1991): Age determinations of Paleogene Diamictites from Prydz Bay (Site 739), Antarctica, using sr isotopes of mollusks and biostratigraphy of microfossils (diatoms and coccoliths). In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 739-745

Hans R Thierstein, J Douglas MacDougall, Ellen E Martin, Birger Larsen, John A Barron & Jack G Baldauf
Age dating of Paleogene diamictites from ODP Site 739 in Prydz Bay with marine microfossils (diatoms and calcareous nannofossils) suggests the build-up of a major East Antarctic ice shield in latest Eocene to earliest Oligocene time, about 35-38 m.y. ago. Strontium isotopic analyses of small mollusk remains found within these diamictites, however, yield younger ages ranging from 29 to 23 Ma (i.e., latest early Oligocene to earliest Miocene). These age discrepancies could be caused by...

Analysis of soils from King George Island and Casey station, Antarctica, supplement to: Bölter, Manfred; Blume, Hans-Peter; Kappen, Ludger (1997): Bodenbiologische Untersuchungen in der maritimen und kontinentalen Antarktis (King George Island und Windmill Islands). Teil 1. Umweltparameter und anorganische Nährstoffe. Polarforschung, 65(1), 41-61

Manfred Bölter, Hans-Peter Blume & Ludger Kappen
A comparative study was carried out on soils of the maritime (Arctowski, King George Island) and the continental (Casey, Wilkes Land) Antarctic. Soil sampIes are described for surface layers (0-10 cm) by their in situ temperature profiles as well as by field and laboratory analyses of grain sizes, pH and nutrient contents. Active cryoturbation is a main factor of mixing processes in surfaces with high silt and clay content. In both regions processes of podzolisation...

Various paleoclimate proxy parameters compiled within the MARGO project

Timothy T Barrows, Min-Te Chen, Anne de Vernal, Frédérique Eynaud, Claude Hillaire-Marcel, Thorsten Kiefer, Kyung Eun Lee, Fabienne Marret, Maryse Henry, Stephen Juggins, Laurent Londeix, Sylvie Mangin, Jens Matthiessen, Taoufik Radi, André Rochon, Sandrine Solignac, Jean-Louis Turon, Claire Waelbroeck & Mara Weinelt
This datasets includes paleoclimate proxy parameters compiled within the MARGO project.

Continuous condensation particle (CP) observations from 1984 through 2009 at Neumayer Station, Antarctica, supplement to: Weller, Rolf; Minikin, Andreas; Wagenbach, Dietmar; Dreiling, Volker (2011): Characterization of the inter-annual, seasonal, and diurnal variations of condensation particle concentrations at Neumayer, Antarctica. Atmospheric Chemistry and Physics, 11(24), 13243-13257

Rolf Weller, Andreas Minikin, Dietmar Wagenbach & Volker Dreiling
Continuous condensation particle (CP) observations were conducted from 1984 through 2009 at Neumayer Station under stringent contamination control. During this period, the CP concentration (median 258 1/cm**3) showed no significant long term trend but exhibited a pronounced seasonality characterized by a stepwise increase starting in September and reaching its annual maximum of around 10**3/cm**3 in March. Minimum values below 10**2/cm**3 were observed during June/July. Dedicated time series analyses in the time and frequency domain revealed...

Petrography and geochemical composition of the Atlantis II Fracture Zone, supplement to: Dick, Henry J B; Schouten, Hans; Meyer, Peter S; Gallo, David G; Bergh, Hugh; Tyce, Robert; Patriat, Phillipe; Johnson, Kevin T M; Snow, Jon; Fisher, Andrew T (1991): Tectonic evolution of the Atlantis II fracture zone. In: Von Herzen, RP; Robinson, PT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 118, 359-398

Henry J B Dick, Hans Schouten, Peter S Meyer, David G Gallo, Hugh Bergh, Robert Tyce, Phillipe Patriat, Kevin T M Johnson, Jon Snow & Andrew T Fisher
SeaBeam echo sounding, seismic reflection, magnetics, and gravity profiles were run along closely spaced tracks (5 km) parallel to the Atlantis II Fracture Zone on the Southwest Indian Ridge, giving 80% bathymetric coverage of a 30- * 170-nmi strip centered over the fracture zone. The southern and northern rift valleys of the ridge were clearly defined and offset north-south by 199 km. The rift valleys are typical of those found elsewhere on the Southwest Indian...

Sea surface temperature estimation for MIS 16 of IODP Site 306-U1313, supplement to: Naafs, Bernhard David A; Hefter, Jens; Ferretti, Patrizia; Stein, Ruediger; Haug, Gerald H (2011): Sea surface temperatures did not control the first occurrence of Hudson Strait Heinrich Events during MIS 16. Paleoceanography, 26, PA4201

Bernhard David A Naafs, Jens Hefter, Patrizia Ferretti, Ruediger Stein & Gerald H Haug
Hudson Strait (HS) Heinrich Events, ice-rafting events in the North Atlantic originating from the Laurentide ice sheet (LIS), are among the most dramatic examples of millennial-scale climate variability and have a large influence on global climate. However, it is debated as to whether the occurrence of HS Heinrich Events in the (eastern) North Atlantic in the geological record depends on greater ice discharge, or simply from the longer survival of icebergs in cold waters. Using...

Stable oxygen isotopes of Antarctic snow pits, supplement to: Bertler, Nancy A; Naish, Tim R; Oerter, Hans; Kipfstuhl, Sepp; Barrett, Peter J; Mayewski, Paul Andrew; Kreutz, Karl (2006): The Effects of joint ENSO – Antarctic Oscillation Forcing on the McMurdo Dry Valleys, Antarctica. Antarctic Science, 18(4), 507-514

Nancy A Bertler, Tim R Naish, Hans Oerter, Sepp Kipfstuhl, Peter J Barrett, Paul Andrew Mayewski & Karl Kreutz
Stable oxygen analyses and snow accumulation rates from snow pits sampled in the McMurdo Dry Valleys have been used to reconstruct variations in summer temperature and moisture availability over the last four decades. The temperature data show a common interannual variability, with strong regional warmings occurring especially in 1984/85, 1995/96 and 1990/91 and profound coolings during 1977/78, 1983/84, 1988/89, 1993/94, and 1996/97. Annual snow accumulation shows a larger variance between sites, but the early 1970s,...

Planktic foraminiferal distribution and stable isotope ratios of sediment core MSM05/5_712-1 from the Arctic Ocean, supplement to: Spielhagen, Robert F; Werner, Kirstin; Sørensen, Steffen Aagaard; Zamelczyk, Katarzyna; Kandiano, Evgenia S; Budéus, Gereon; Husum, Katrine; Marchitto, Thomas M; Hald, Morten (2011): Enhanced modern heat transfer to the Arctic by warm Atlantic water. Science, 331(6016), 450-453

Robert F Spielhagen, Kirstin Werner, Steffen Aagaard Sørensen, Katarzyna Zamelczyk, Evgenia S Kandiano, Gereon Budéus, Katrine Husum, Thomas M Marchitto & Morten Hald
The Arctic is responding more rapidly to global warming than most other areas on our planet. Northward flowing Atlantic Water is the major means of heat advection towards the Arctic and strongly affects the sea ice distribution. Records of its natural variability are critical for the understanding of feedback mechanisms and the future of the Arctic climate system, but continuous historical records reach back only ~150 years. Here, we present a multidecadal scale record of...

Sea surface temperature reconstruction for ODP Hole 178-1098B, supplement to: Shevenell, Amelia E; Ingalls, Anitra E; Domack, Eugene W; Kelly, Ciarán (2011): Holocene Southern Ocean surface temperature variability west of the Antarctic Peninsula. Nature, 470(7333), 250-254

Amelia E Shevenell, Anitra E Ingalls, Eugene W Domack & Ciarán Kelly
The disintegration of ice shelves, reduced sea-ice and glacier extent, and shifting ecological zones observed around Antarctica (Cook et al., 2005, doi:10.1126/science.1104235; Stammerjohn et al., 2008, doi:10.1016/j.dsr2.2008.04.026) highlight the impact of recent atmospheric (Steig et al., 2009, doi:10.1038/nature07669) and oceanic warming (Gille, 2002, doi:10.1126/science.1065863) on the cryosphere. Observations (Cook et al., 2005, doi:10.1126/science.1104235; Stammerjohn et al., 2008, doi:10.1016/j.dsr2.2008.04.026) and models (Pollard and DeConto, 2009, doi:10.1038/nature07809) suggest that oceanic and atmospheric temperature variations at Antarctica's margins...

Modes of sapropel formation in the eastern Mediterranean: some constraints based on pyrite properties, supplement to: Passier, Hilde F; Middelburg, Jack J; de Lange, Gert Jan; Böttcher, Michael E (1999): Modes of sapropel formation in the eastern Mediterranean: some constraints based on pyrite properties. Marine Geology, 153(1-4), 199-219

Hilde F Passier, Jack J Middelburg, Gert Jan de Lange & Michael E Böttcher
Pyrite formation within and directly below sapropels in the eastern Mediterranean was governed by the relative rates of sulphide production and Fe liberation and supply to the organic-rich layers. At times of relatively high [SO4]2- reduction, sulphide could diffuse downward from the sapropel and formed pyrite in underlying sediments. The sources of Fe for pyrite formation comprised detrital Fe and diagenetically liberated Fe(II) from sapropel-underlying sediments. In organic-rich sapropels, input of Fe from the water...

Element contents, sulfur and oxygen isotopes, and molecular biomarkers of phosphatic crust samples from the Chimbote Platform of the shelf off Peru, supplement to: Arning, Esther T; Birgel, Daniel; Brunner, B; Peckmann, Jörn Ludwig (2009): Bacterial formation of phosphatic laminites off Peru. Geobiology, 7, 295-307

Esther T Arning, Daniel Birgel, B Brunner & Jörn Ludwig Peckmann
Authigenic phosphatic laminites enclosed in phosphorite crusts from the shelf off Peru (10°01' S and 10°24' S) consist of carbonate fluorapatite layers, which contain abundant sulfide minerals including pyrite (FeS2) and sphalerite (ZnS). Low d34Spyrite values (average -28.8 per mill) agree with bacterial sulfate reduction and subsequent pyrite formation. Stable sulfur isotopic compositions of sulfate bound in carbonate fluorapatite are lower than that of sulfate from ambient sea water, suggesting bacterial reoxidation of sulfide by...

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...

Victoria Land Antarctica Pb and Ba concentrations and Pb isotope ratios 1872-1994 CE, supplement to: Van de Velde, K; Vallelonga, Paul T; Candelone, Jean-Pierre; Rosman, K J R; Gaspari, Vania; Cozzi, Giulio; Barbante, Carlo; Udisti, Roberto; Cescon, Paolo; Boutron, Claude F (2005): Pb isotope record over one century in snow from Victoria Land, Antarctica. Earth and Planetary Science Letters, 232, 95-108

K Van de Velde, Paul T Vallelonga, Jean-Pierre Candelone, K J R Rosman, Vania Gaspari, Giulio Cozzi, Carlo Barbante, Roberto Udisti, Paolo Cescon & Claude F Boutron
Pb and Ba concentrations and Pb isotopic compositions are reported for firn core and snow pit samples from Victoria Land, Antarctica, dating from 1872 AD to 1994 AD. From variations in Pb/Ba ratios and Pb isotopic compositions, two periods of major Pb enhancements were identified, from 1891 to 1908 AD and from 1948 to 1994 AD. The earlier pollution event is attributed to Pb emissions from non-ferrous metal production and coal combustion in the Southern...

Glacial sedimentation in ODP Leg 119 samples, supplement to: Barron, John A; Larsen, Birger; Baldauf, Jack G (1991): Evidence for late Eocene to early Oligocene Antarctic glaciation and observations on late Neogene glacial history of Antarctica: results from Leg 119. In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 869-891

John A Barron, Birger Larsen & Jack G Baldauf
Although scientific evidence prior to that from ODP Leg 119 indicates the presence of an ice sheet on East Antarctica by at least the earliest Oligocene, the question as to the size and stability of that initial ice sheet is still contested. Current hypotheses include (1) the presence of a small ice sheet in the earliest Oligocene with stepwise growth during the Neogene, (2) the presence of a continental-sized ice sheet in the late middle...

Diatoms and laminae of Mediterranean sapropels, supplement to: Kemp, Alan E S; Pearce, Richard B; Koizumi, Itaru; Pike, Jennifer; Rance, Jae (1999): The role of mat-forming diatoms in the formation of Mediterranean sapropels. Nature, 398(6722), 57-61

Alan E S Kemp, Richard B Pearce, Itaru Koizumi, Jennifer Pike & Jae Rance
The origins of sapropels (sedimentary layers rich in organic carbon) are unclear, yet they may be a key to understanding the influence of climate on ocean eutrophication, the mechanisms of sustaining biological production in stratified waters and the genesis of petroleum source rocks (Rohling, 1994, doi:10.1016/0025-3227(94)90202-X; Castradori, 1993, doi:10.1029/93PA00756; Calvert et al., 1992, doi:10.1038/359223a0). Recent microfossil studies of foraminifera (Rohling, 1994, doi:10.1016/0025-3227(94)90202-X) and calcareous nannofossils (Castradori, 1993, doi:10.1029/93PA00756) have focused attention on a deep chlorophyll...

Sea ice diatoms from Late Quaternary sediments in the Scotia Sea, supplement to: Allen, Claire Susannah; Pike, Jennifer; Pudsey, Carol J (2011): Last glacial-interglacial sea-ice cover in the SW Atlantic and its potential role in global deglaciation. Quaternary Science Reviews, 30(19-20), 2446-2458

Claire Susannah Allen, Jennifer Pike & Carol J Pudsey
Sea-ice growth and decay in Antarctica is one of the biggest seasonal changes on Earth, expanding ice cover from 4x10**6 km**2 to a maximum of 19x10**6 km**2 during the austral winter. Analyses of six marine sediment cores from the Scotia Sea, SW Atlantic, yield records of sea-ice migration across the basin since the Lateglacial. The cores span nearly ten degrees of latitude from the modern seasonal sea-ice zone to the modern Polar Front. Surface sediments...

Registration Year

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  • LDEO - Lamont-Doherty Earth Observatory, Columbia University
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