46,812 Works

Upper air soundings during POLARSTERN cruise ANT-XXI/5

Gert König-Langlo
The upper air soundings are normally performed once a day to measure vertical profiles of air pressure, temperature, relative humidity and the wind vector. Helium filled balloons (TOTEX 600 g, 800 g) were used to carry Vaisala RS92-SGPW radiosondes. Whenever possible, the launches were performed about 10 UTC. Condensed measurements (TEMP Format FM-35) were transferred without delay into the Global Telecommunication System GTS were they contribute for the world wide weather forecasts. The profile data...

Late Holocene pollen and organic walled dinoflagellate cysts analyses of sedimet cores from the Java Sea, supplement to: Poliakova, Anastasia; Zonneveld, Karin A F; Kwiatkowski, Cornelia; Suryoko, Mustaba Ari; Behling, Hermann (2017): Marine environment, vegetation and land use changes during the late Holocene in South Kalimantan and East Java reconstructed based on pollen and organic-walled dinoflagellate cysts analysis. Review of Palaeobotany and Palynology, 238, 105-121

Anastasia Poliakova, Karin A F Zonneveld, Cornelia Kwiatkowski, Ricardo De Pol-Holz, Mustaba Ari Suryoko & Hermann Behling
The pollen, spore and organic walled dinoflagelletas cyst associations of two marine sediment cores from the Java Sea off the mouths of Jelai River (South Kalimantan) and Solo River (East Java) reflect environment and vegetation changes during the last ca 3500 years in the region. A decline in primary forest taxa (e.g. Agathis, Allophylus, Dacrycarpus, Dacrydium, Dipterocarpaceae, Phyllocladus, and Podocarpus) suggest that the major change in vegetation is caused by the forest canopy opening that...

Teotihuacan, Mexico

Hannah Reitzel Rivera
This project is a compilation of resources from the site of Teotihuacan, Mexico.

Ground-penetrating radar (GPR) point measurements of ice thickness in Austria

Andrea Fischer, Norbert Span, Michael Kuhn, Kay Helfricht, Martin Stocker-Waldhuber, Bernd Seiser, Marius Massimo & Michael Butschek
Glacier thickness is an important factor in the course of glacier retreat in a warming climate. Thiese study data presents the results (point data) of GPR surveys on 66 Austrian mountain glaciers carried out between 1995 and 2014. The glacier areas range from 0.001 to 18.4 km**2, and their ice thickness has been surveyed with an average density of 36 points/km**2 . The glacier areas and surface elevations refer to the second Austrian glacier inventory...

Snow melt monitoring near the Polish Polar Station in Hornsund, Svalbard, using Automatic Camera Systems

Bartlomiej Luks, Tomasz Wawrzyniak & Sebastian Westermann
On Svalbard, the long-lasting snow cover and the timing of the snowmelt is a crucial factor in the yearly cycle of all land ecosystems. To monitor the timing and patterns of snow melt, automatic camera systems have been set up at two locations overlooking key research areas near the Polish Polar Station in Hornsund, Svalbard. All images are provided in daily resolution, and the date coded in the filename as yyyy-MM-dd.This work was funded by...

Ice thickness measurements on South Tyrolean glaciers 1996-2014

Andrea Fischer, Christian Mitterer, Martin Stocker-Waldhuber, Daniel Binder & Roberto Dinale
The ice thickness of 15 South Tyrolean glaciers has been surveyed with two different types of radar systems between 1996 and 2014 within various research projects. For all glaciers apart from Weissbrunnferner, the Laser scan DEMs of the South Tyrolean glacier inventories had been taken as basis for the data processing. Earlier data has been measured with the Narod Sensor using a central frequency of 6.5 MHz, later data was recorded with a GSSI SIR...

The Austrian Glacier Inventories GI 1 (1969), GI 2 (1998), GI 3 (2006), and GI LIA in ArcGIS (shapefile) format, supplement to: Fischer, Andrea; Seiser, Bernd; Stocker-Waldhuber, Martin; Mitterer, Christian; Abermann, Jakob (2015): Tracing glacier changes in Austria from the Little Ice Age to the present using a lidar-based high-resolution glacier inventory in Austria. The Cryosphere, 9(2), 753-766

Andrea Fischer, Bernd Seiser, Martin Stocker-Waldhuber, Christian Mitterer & Jakob Abermann
Glacier inventories provide the basis for further studies on mass balance and volume change, relevant for local hydrological issues as well as for global calculation of sea level rise. In this study, a new Austrian glacier inventory has been compiled, updating data from 1969 (GI 1) and 1998 (GI 2) based on high-resolution lidar digital elevation models (DEMs) and orthophotos dating from 2004 to 2012 (GI 3). To expand the time series of digital glacier...

SEAFOS seal census survey at Filchner Outflow System during campaign FIL2014

Marthán N Bester, W Christiaan Oosthuizen & Horst Bornemann
FIL2013: Polar 6 conducted a systematic digital photographic aerial survey of the area of the Filchner Outflow System during two survey flights from Halley VI on 15 and 16 November 2013. The total survey distance covered 3,000 km each on 15 (eastern section) and 16 (western section) November 2013. Due to a low cloud ceiling on 15 November, the first flight operation was terminated prematurely and thus the westernmost track could not be flown. This...

Holocene Mg/Ca, alkenones, and light stable isotope measurements on the outer North Iceland shelf, sediment core MD99-2269, supplement to: Kristjánsdóttir, Greta B; Moros, Matthias; Andrews, John T; Jennings, Anne E (2016): Holocene Mg/Ca, alkenones, and light stable isotope measurements on the outer North Iceland shelf (MD99-2269): A comparison of proxy data. The Holocene, 27(1), 52-62

Greta B Kristjánsdóttir, Matthias Moros, John T Andrews & Anne E Jennings
We present new Holocene century to millennial-scale proxies for the well-dated piston core MD99-2269 from Húnaflóadjúp on the North Iceland Shelf. The core is located in 365 mwd and lies close to the fluctuating boundary between Atlantic and Arctic/Polar waters. The proxies are: alkenone-based SST°C, and Mg/Ca SST°C estimates and stable d13C and d18O values on planktonic and benthic foraminifera. The data were converted to 60 yr equi-spaced time-series. Significant trends in the data were...

Changes in bottom water corrosiveness and carbonate ion concentrations in the sub-Antarctic Atlantic during the last glacial period, supplement to: Gottschalk, Julia; Skinner, Luke C; Misra, Sambuddha; Waelbroeck, Claire; Menviel, Laurie; Timmermann, Axel (2015): Abrupt changes in the southern extent of North Atlantic Deep Water during Dansgaard–Oeschger events. Nature Geoscience, 8(12), 950-954

Julia Gottschalk, Luke C Skinner, Sambuddha Misra, Claire Waelbroeck, Laurie Menviel & Axel Timmermann
The glacial climate system transitioned rapidly between cold (stadial) and warm (interstadial) conditions in the Northern Hemisphere. This variability, referred to as Dansgaard-Oeschger variability, is widely believed to arise from perturbations of the Atlantic Meridional Overturning Circulation. Evidence for such changes during the longer Heinrich stadials has been identified, but direct evidence for overturning circulation changes during Dansgaard-Oeschger events has proven elusive. Here we reconstruct bottom water [CO3]2- variability from B/Ca ratios of benthic foraminifera...

Age determination of sediment core MD99-2201, supplement to: Roth, Sven; Reijmer, John J G (2004): Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank). Paleoceanography, 19(1), PA1003

Sven Roth & John J G Reijmer
A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age differences between planktonic foraminifera and aragonite sediments, and temperature distribution are used to deduce changes in aragonite production rates and paleocurrent strengths. Aragonite precipitation rates on GBB...

Persistent monsoonal forcing of Mediterranean Outflow dynamics during the late Pleistocene, supplement to: Bahr, André; Kaboth, Stefanie; Jiménez-Espejo, Francisco J; Sierro, Francisco Javier; Voelker, Antje H L; Lourens, Lucas Joost; Röhl, Ursula; Reichart, Gert-Jan; Escutia, Carlota; Hernandéz-Molina, Francisco Javier; Pross, Jörg; Friedrich, Oliver (2015): Persistent monsoonal forcing of Mediterranean Outflow Water dynamics during the late Pleistocene. Geology, 43(11), 951-954

André Bahr, Stefanie Kaboth, Francisco J Jiménez-Espejo, Francisco Javier Sierro, Antje H L Voelker, Lucas Joost Lourens, Ursula Röhl, Gert-Jan Reichart, Carlota Escutia, Francisco Javier Hernandéz-Molina, Jörg Pross & Oliver Friedrich
The mode and vigor of the global oceanic circulation critically depend on the salinity of (sub)surface water masses advected to the loci of deep-water formation. Within the Atlantic meridional overturning circulation (AMOC), an important supplier of high-salinity waters is the Mediterranean Outflow Water (MOW), discharging into the North Atlantic via the Strait of Gibraltar. Despite its importance for the North Atlantic salinity budget, the long-term dynamics of MOW production have remained poorly understood. Here we...

Microcharcoal concentration and elongation, and age model of sediment core MD96-2098, supplement to: Daniau, Anne-Laure; Sanchez Goñi, Maria Fernanda; Martinez, Philippe; Urrego, Dunia H; Bout-Roumazeilles, Viviane; Desprat, Stéphanie; Marlon, Jennifer R (2013): Orbital-scale climate forcing of grassland burning in southern Africa. Proceedings of the National Academy of Sciences, 110(13), 5069-5073

Anne-Laure Daniau, Maria Fernanda Sanchez Goñi, Philippe Martinez, Dunia H Urrego, Viviane Bout-Roumazeilles, Stéphanie Desprat & Jennifer R Marlon
Although grassland and savanna occupy only a quarter of the world's vegetation, burning in these ecosystems accounts for roughly half the global carbon emissions from fire. However, the processes that govern changes in grassland burning are poorly understood, particularly on time scales beyond satellite records. We analyzed microcharcoal, sediments, and geochemistry in a high-resolution marine sediment core off Namibia to identify the processes that have controlled biomass burning in southern African grassland ecosystems under large,...

Stakeholderanalyse zu Forschungsdaten in den Altertumswissenschaften

Maurice Heinrich, Anne Sieverling, Felix Schäfer, Sabine Jahn & IANUS-Forschungsdatenzentrum Für Archäologie & Altertumswissenschaften

Vegetation, soil and site characteristics of samples taken along the Yamal Transet in 2007-2008, supplement to: Walker, Donald A; Epstein, Howard E; Leibman, Marina O; Moskalenko, Nataliya G; Orekhov, Pavel; Kuss, Patrick; Matyshak, George V; Kaarlejärvi, Elina; Forbes, Bruce C; Barbour, E M; Gobroski, K (2009): Data Report of the 2007 and 2008 Yamal Expeditions. Alaska Geobotany Center, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, 121 pp

Donald A Walker, Howard E Epstein, Marina O Leibman, Nataliya G Moskalenko, Pavel Orekhov, Patrick Kuss, George V Matyshak, Elina Kaarlejärvi, Bruce C Forbes, E M Barbour & K Gobroski
The overarching goal of the Yamal portion of the Greening of the Arctic project is to examine how the terrain and anthropogenic factors of reindeer herding and resource development combined with the climate variations on the Yamal Peninsula affect the spatial and temporal patterns of vegetation change and how these changes are in turn affecting traditional herding of the indigenous people of the region. The purpose of the expeditions was to collect groundobservations in support...

Biomarker proxies on sediment cores in the central Arctic Ocean, supplement to: Stein, Ruediger; Fahl, Kirsten; Schreck, Michael; Knorr, Gregor; Niessen, Frank; Forwick, Matthias; Gebhardt, Catalina; Jensen, Laura; Kaminski, Michael A; Kopf, Achim J; Matthiessen, Jens; Jokat, Wilfried; Lohmann, Gerrit; PS87 Geoscience Party (2015): Ice-free summers in the late Miocene central Arctic Ocean - New insights from proxy/model reconstruction. Nature Communications, 7, 11148

Ruediger Stein, Kirsten Fahl, Michael Schreck, Gregor Knorr, Frank Niessen, Matthias Forwick, Catalina Gebhardt, Laura Jensen, Michael A Kaminski, Achim J Kopf, Jens Matthiessen, Wilfried Jokat, Gerrit Lohmann & PS87 Geoscience Party
Although the permanently to seasonally ice-covered Arctic Ocean is a unique and sensitive component in the Earth's climate system, the knowledge of its long-term climate history remains very limited due to the restricted number of pre-Quaternary sedimentary records. During Polarstern Expedition PS87/2014, we discovered multiple submarine landslides over a distance of >350 km along Lomonosov Ridge. Removal of younger sediments from steep headwalls has led to exhumation of Miocene to early Quaternary sediments close to...

Sediment, isotopic and geochemical record during Marine Isotope Stages 29 to 34 of IODP Site 339-U1387, supplement to: Voelker, Antje H L; Salgueiro, Emilia; Rodrigues, Teresa; Jiménez-Espejo, Francisco J; Bahr, André; Alberto, Ana; Loureiro, Isabel; Padilha, Mária; Rebotim, Andreia; Röhl, Ursula (2015): Mediterranean Outflow and surface water variability off southern Portugal during the early Pleistocene: A snapshot at Marine Isotope Stages 29 to 34 (1020–1135ka). Global and Planetary Change, 133, 223-237

Antje H L Voelker, Emilia Salgueiro, Teresa Rodrigues, Francisco J Jiménez-Espejo, André Bahr, Ana Alberto, Isabel Loureiro, Mária Padilha, Andreia Rebotim & Ursula Röhl
Centennial-to-millennial scale records from IODP Site U1387, drilled during IODP Expedition 339 into the Faro Drift at 558 m water depth, now allow evaluating the climatic history of the upper core of the Mediterranean Outflow (MOW) and of the surface waters in the northern Gulf of Cadiz during the early Pleistocene. This study focuses on the period from Marine Isotope Stage (MIS) 29 to 34, i.e. the interval surrounding extreme interglacial MIS 31. Conditions in...

Correlation between wet bulk density and carbonate content from IODP Hole 321-U1338A, 321-U1338B and 321-U1338C, supplement to: Reghellin, Daniele; Dickens, Gerald Roy; Backman, Jan (2013): The relationship between wet bulk density and carbonate content in sediments from the Eastern Equatorial Pacific. Marine Geology, 344, 41-52

Daniele Reghellin, Gerald Roy Dickens & Jan Backman
Sediment cores collected from the Eastern Equatorial Pacific Ocean display a clear positive second-order relationship between wet bulk density (WBD) and carbonate content. This has long interested the paleoceanography community because detailed Gamma Ray Attenuation Porosity Evaluator (GRAPE) measurements, which approximate WBD, might be used to determine records of carbonate content at very high temporal resolution. Although general causes for the relationship are known, they have not been presented and discussed systematically on the basis...

Ichthyolith (tooth and denticle) counts from DSDP 386, 596, ODP 886, 1262, IODP U1403, and Gubbio K/Pg boundary sections, supplement to: Sibert, Elizabeth C; Norris, Richard D (2015): New Age of Fishes initiated by the Cretaceous-Paleogene mass extinction. Proceedings of the National Academy of Sciences, 112(28), 8537-8542

Elizabeth C Sibert & Richard D Norris
Ray-finned fishes (Actinopterygii) comprise nearly half of all modern vertebrate diversity, and are an ecologically and numerically dominant megafauna in most aquatic environments. Crown teleost fishes diversified relatively recently, during the Late Cretaceous and early Paleogene, although the exact timing and cause of their radiation and rise to ecological dominance is poorly constrained. Here we use microfossil teeth and shark dermal scales (ichthyoliths) preserved in deep-sea sediments to study the changes in pelagic fish community...

IODP Expedition 337, Shimokita Deep Coalbed Biosphere, supplement to: Inagaki, F; Hinrichs, Kai-Uwe; Kubo, Y; Bowles, Marshall W; Heuer, Verena B; Hong, W-L; Hoshino, Tatsuhiko; Ijiri, Akira; Imachi, H; Ito, M; Kaneko, Masanori; Lever, Mark A; Lin, Yu-Shih; Methe, B A; Morita, S; Morono, Yuki; Tanikawa, W; Bihan, M; Bowden, S A; Elvert, Marcus; Glombitza, C; Gross, D; Harrington, G J; Hori, T; Li, K; Limmer, D; Liu, Chiung-Hui; Murayama, M; Ohkouchi, Naohiko; Ono, Shuhei; Park, Young-Soo; Phillips, S C; Prieto-Mollar, Xavier; Purkey, M; Riedinger, Natascha; Sanada, Yoshinori; Sauvage, J; Snyder, Glen T; Susilawati, R; Takano, Yoshinori; Tasumi, E; Terada, Takeshi; Tomaru, Hitoshi; Trembath-Reichert, E; Wang, D T; Yamada, Y (2015): Exploring deep microbial life in coal-bearing sediment down to ~2.5 km below the ocean floor. Science, 439 (6246), 420-424

F Inagaki, Kai-Uwe Hinrichs, Y Kubo, Marshall W Bowles, Verena B Heuer, W-L Hong, Tatsuhiko Hoshino, Akira Ijiri, H Imachi, M Ito, Masanori Kaneko, Mark A Lever, Yu-Shih Lin, B A Methe, S Morita, Yuki Morono, W Tanikawa, M Bihan, S A Bowden, Marcus Elvert, C Glombitza, D Gross, G J Harrington, T Hori, K Li … & Y Yamada
Microbial life inhabits deeply buried marine sediments, but the extent of this vast ecosystem remains poorly constrained. Here we provide evidence for the existence of microbial communities in ~40° to 60°C sediment associated with lignite coal beds at ~1.5 to 2.5 km below the seafloor in the Pacific Ocean off Japan. Microbial methanogenesis was indicated by the isotopic compositions of methane and carbon dioxide, biomarkers, cultivation data, and gas compositions. Concentrations of indigenous microbial cells...

Laboratory shearing experiments at low sliding velocities of IODP Hole 343-C0019E, supplement to: Ikari, Matt J; Kameda, Jun; Saffer, Demian M; Kopf, Achim J (2015): Strength characteristics of Japan Trench borehole samples in the high-slip region of the 2011 Tohoku-Oki earthquake. Earth and Planetary Science Letters, 412, 35-41

Matt J Ikari, Jun Kameda, Demian M Saffer & Achim J Kopf
The 2011 Tohoku-Oki earthquake demonstrated that the shallowest reaches of plate boundary subduction megathrusts can host substantial coseismic slip that generates large and destructive tsunamis, contrary to the common assumption that the frictional properties of unconsolidated clay-rich sediments at depths less than View the MathML source should inhibit rupture. We report on laboratory shearing experiments at low sliding velocities (View the MathML source) using borehole samples recovered during IODP Expedition 343 (JFAST), spanning the plate-boundary...

Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307, supplement to: Sarnthein, Michael; Bartoli, Gretta; Prange, Matthias; Schmittner, Andreas; Schneider, Birgit; Weinelt, Mara; Andersen, Nils; Garbe-Schönberg, Carl-Dieter (2009): Mid-Pliocene shifts in ocean overturning circulation and the onset of Quaternary-style climates. Climate of the Past, 5, 269-283

Michael Sarnthein, Gretta Bartoli, Matthias Prange, Andreas Schmittner, Birgit Schneider, Mara Weinelt, Nils Andersen & Carl-Dieter Garbe-Schönberg
A major tipping point of Earth's history occurred during the mid-Pliocene: the onset of major Northern-Hemisphere Glaciation (NHG) and of pronounced, Quaternary-style cycles of glacial-to-interglacial climates, that contrast with more uniform climates over most of the preceding Cenozoic and continue until today (Zachos et al., 2001, doi:10.1126/science.1059412). The severe deterioration of climate occurred in three steps between 3.2 Ma (warm MIS K3) and 2.7 Ma (glacial MIS G6/4) (Lisiecki and Raymo, 2005, doi:10.1029/2004PA001071). Various models...

Genome-Scale Metabolic Network DataBase

Re3data.Org
Introduction of genome-scale metabolic network: The completion of genome sequencing and subsequent functional annotation for a great number of species enables the reconstruction of genome-scale metabolic networks. These networks, together with in silico network analysis methods such as the constraint based methods (CBM) and graph theory methods, can provide us systems level understanding of cellular metabolism. Further more, they can be applied to many predictions of real biological application such as: gene essentiality analysis, drug...

Correlation between RPPA expression and clinical features

Broad Institute TCGA Genome Data Analysis Center

Environmental data explorer

Re3data.Org
The Environmental Data Explorer is the authoritative source for data sets used by UNEP and its partners in the Global Environment Outlook (GEO) report and other integrated environment assessments. Its online database holds more than 500 different variables, as national, subregional, regional and global statistics or as geospatial data sets (maps), covering themes like Freshwater, Population, Forests, Emissions, Climate, Disasters, Health and GDP. Display them on-the-fly as maps, graphs, data tables or download the data...

Registration Year

  • 2015
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  • Imperial College London
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