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PANGAEA - Publishing Network for Geoscientific & Environmental Data (831.663 recursos)

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PANGAEA tech-keyword 'supplement' (10352 data sets)

Mostrando recursos 1 - 20 de 12.272

  1. Circadian clock involvement in zooplankton diel vertical migration, link to supplementary material

    Häfker, Sören
    Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet....

  2. Bulk sediment geochemistry (Ti/Al, TOC, TOC d13C) and G. ruber stable isotope records of sediment cores PS009PC and MS21PC

    Hennekam, Rick; Donders, Timme H; Zwiep, Karin; de Lange, Gert Jan
    We compare geochemical and pollen data of several well-dated, high-resolution cores to provide an integral Holocene overview of Nile outflow, sedimentation, and vegetation in and around the Nile delta. We show that the focus point of the Nile plume varied considerably, as indicated by planktonic foraminifer Globigerinoides ruber oxygen isotopes tracing Nile discharge differences in an east-west delta transect. At 13-11.5 cal kyr BP, Nile discharge was low and runoff was predominantly directed to the western part of the delta. Sediment arriving in the delta during that period was dominated by Ethiopian Highland (~Blue Nile) material, shown by high Ti/Al...

  3. West Antarctic Ice Sheet retreat driven by Holocene warm water incursions, supplementary data

    Hillenbrand, Claus-Dieter; Smith, James A; Hodell, David A; Greaves, Mervyn; Poole, Christopher R; Kender, Sev; Williams, Mark; Andersen, Thorbjørn Joest; Jernas, Patrycja E; Elderfield, Henry; Klages, Johann Philipp; Robertson, Scott B; Gohl, Karsten; Larter, Robert D; Kuhn, Gerhard
    Will be added after publishing

  4. Major elemental concentrations from NGRIP ice core across the interstadial period GI-21.2

    Della Lunga, Damiano; Müller, Wolfgang; Rasmussen, Sune Olander; Svensson, Anders M; Vallelonga, Paul
    Several abrupt shifts from periods of extreme cold (Greenland stadials, GS) to relatively warmer conditions (Greenland interstadials, GI) called Dansgaard-Oeschger events are recorded in the Greenland ice cores. Using cryo-cell UV-laser-ablation inductively-coupled-plasma mass spectrometry (UV-LA-ICPMS), we analysed a 2.85 m NGRIP ice core section (~ 250 years; 2691.50-2688.65 m depth) across the transitions of GI-21.2, a short-lived interstadial prior to interstadial GI-21.1 (GI-21.2: 84.87-85.09 ka b2k). GI-21.2 is a ~100-year-long period with d18O values 3-4 per mil higher than the following ~200 years of stadial conditions (GS-21.2), which precede the major GI-21.1 warming. We report concentrations of "major" elements indicative...

  5. Seawater carboante chemistry and algal abundance, growth and flourometry data of a late summer suface sea ice community

    McMinn, Andrew; Müller, Marius N; Martin, Andrew; Ugalde, Sarah C; Lee, Shihong; Castrisios, Katerina; Ryan, Ken G
    Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the same time, pH levels can rise above 9 and nutrients can become limiting. In January 2014, the sea ice microbial community from the top 30 cm of the ice was exposed to a gradient of pH and CO2 (5 treatments) that ranged from 8.87 to 7.12 and 5-215 µmol CO2 kg?1, respectively, and...

  6. Biomass growth and physiological parameters of the macroalga Fucus vesiculosus forma mytili, along with seawater parameters and inorganic nutrient concentrations of the tidal benthic mesocosms on the island of Sylt in spring 2014

    Mensch, Birte; Neulinger, S C; Graiff, Angelika; Pansch, Andreas; Künzel, Sven; Fischer, Martin A; Schmitz, Ruth A
    Ocean acidification and warming effects on the macroalgal species Fucus vesiculosus forma mytili were simulated in the tidal benthic mesocosm facility at the AWI Wadden Sea Station on the island of Sylt, Germany (55°01'19.2''N, 8°26'17.7''E). The SY1 experiment in spring 2014 (11 weeks from early April to late June) was based on a "Temp X pCO2" full-factorial setup (ambient or delta 5°C temperature X ambient or 1000 ppm pCO2) resulting in 4 treatment levels à 3 replicates. The seawater parameters (temperature, pH, salinity, total alkalinity, pCO2) and seawater inorganic nutrient concentrations (silicate, nitrite, phosphate, ammonium, total nitrogen oxide, nitrate) were...

  7. Seawater carboante chemistry and corrosion and results of the mechanical tests of cidaroid (Eucidaris tribuloides) and a euechinoid (Tripneustes ventricosus) in laboratory experiment

    Dery, Aurélie; Collard, Marie; Dubois, Philippe
    Echinoderms are considered as particularly sensitive to ocean acidification (OA) as their skeleton is made of high-magnesium calcite, one of the most soluble forms of calcium carbonate. Recent studies have investigated effects of OA on the skeleton of "classical" sea urchins (euechinoids) but the impact of etching on skeleton mechanical properties is almost unknown. Furthermore, the integrity of the skeleton of cidaroids has never been assessed although their extracellular fluid is undersaturated with respect to their skeleton and the skeleton of their primary spines is in direct contact with seawater. In this study, we compared the dissolution of test plates...

  8. Seawater carboante chemistry and growth rate, primary production of Cystoseira tamariscifolia (Phaeophyceae) in laboratory experiment

    Celis-Plá, Paula S M; Martínez, Brezo; Korbee, Nathalie; Hall-Spencer, Jason M; Figueroa, Félix L
    Ocean acidification increases the amount of dissolved inorganic carbon (DIC) available in seawater which can benefit photosynthesis in those algae that are currently carbon limited, leading to shifts in the structure and function of seaweed communities. Recent studies have shown that ocean acidification-driven shifts in seaweed community dominance will depend on interactions with other factors such as light and nutrients. The study of interactive effects of ocean acidification and warming can help elucidate the likely effects of climate change on marine primary producers. In this study, we investigated the ecophysiological responses of Cystoseira tamariscifolia (Hudson) Papenfuss. This large brown macroalga...

  9. Synchronizing early Eocene deep-sea and continental records from the Bighorn Basin Coring Project

    Westerhold, Thomas
    A consistent stratigraphic framework is required to understand the effect of major climate perturbations of the geological past on both marine and terrestrial ecosystems. Transient global warming events in the early Eocene, 56-54 Ma ago, show the impact of large scale input of carbon into the ocean-atmosphere system. Here we provide the first time-scale synchronization of continental and marine deposits spanning the Paleocene-Eocene Thermal Maximum (PETM) and the interval just prior to the Eocene Thermal Maximum 2 (ETM-2). Cyclic variations in geochemical data come from continental drill cores of the Bighorn Basin Drilling Project (BBCP, Wyoming, USA) and from marine...

  10. Geochemistry of sediment core PRGL1-4

    Pasquier, Virgil; Sansjofre, Pierre; Rabineau, Marina; Revillon, Sidonie; Houghton, Jennifer; Fike, David A
    The sulfur biogeochemical cycle plays a key role in regulating Earth's surface redox through diverse abiotic and biological reactions that have distinctive stable isotopic fractionations. As such, variations in the sulfur isotopic composition (d34S) of sedimentary sulfate and sulfide phases over Earth history can be used to infer substantive changes to the Earth's surface environment, including the rise of atmospheric oxygen. Such inferences assume that individual d34S records reflect temporal changes in the global sulfur cycle; this assumption may be well grounded for sulfate-bearing minerals but is less well established for pyrite-based records. Here, we investigate alternative controls on the...

  11. Geochemistry of sapropel S1 deposits in sediment core AMC99-1

    Tesi, Tommaso; Asioli, Alessandra; Minisini, D; Maselli, Vittorio; Dalla Valle, Giacomo; Gamberi, Fabiano; Langone, Leonardo; Cattaneo, Antonio; Montagna, Paolo; Trincardi, Fabio
    The formation of Eastern Mediterranean sapropels has periodically occurred during intensification of northern hemisphere monsoon precipitation over North Africa. However, the large-scale response of the Eastern Mediterranean thermohaline circulation during these monsoon-fuelled freshening episodes is poorly constrained. Here, we investigate the formation of the youngest sapropel (S1) along an across-slope transect in the Adriatic Sea. Foraminifera-based oxygen index, redox-sensitive elements and biogeochemical parameters reveal - for the first time - that the Adriatic S1 was synchronous with the deposition of south-eastern Mediterranean S1 beds. Proxies of paleo thermohaline currents indicate that the bottom-hugging North Adriatic Dense Water (NAdDW) suddenly decreased...

  12. Geochemistry of sapropel S1 deposits in the Adriatic Sea

    Tesi, Tommaso; Asioli, Alessandra; Minisini, D; Maselli, Vittorio; Dalla Valle, Giacomo; Gamberi, Fabiano; Langone, Leonardo; Cattaneo, Antonio; Montagna, Paolo; Trincardi, Fabio
    The formation of Eastern Mediterranean sapropels has periodically occurred during intensification of northern hemisphere monsoon precipitation over North Africa. However, the large-scale response of the Eastern Mediterranean thermohaline circulation during these monsoon-fuelled freshening episodes is poorly constrained. Here, we investigate the formation of the youngest sapropel (S1) along an across-slope transect in the Adriatic Sea. Foraminifera-based oxygen index, redox-sensitive elements and biogeochemical parameters reveal - for the first time - that the Adriatic S1 was synchronous with the deposition of south-eastern Mediterranean S1 beds. Proxies of paleo thermohaline currents indicate that the bottom-hugging North Adriatic Dense Water (NAdDW) suddenly decreased...

  13. Dissolved inorganic carbon data from 2010 and 2013 at the Gulf of Tehuantepec

    Chapa-Balcorta, Cecilia; Hernández-Ayón, José Martín; Beier Emilio, Durazo Reginaldo; Alin, Simone; López-Pérez, Andrés
    Measurements of dissolved inorganic carbon of 27 stations at the Gulf of Tehuantepec, México. Samples were taken during cruises carried out by the Mexican Navy. Secretaría de Marina Armada de Mexico. Stations sampled in June, 2010 on board of RV Altair, 9 were sampled on April 2013 onbord of RV Altair and 9 on October-November 2013 onboard of RV Río Suchiate. Measurements were carried out using the coulometric method described in Johnson et al (1987).

  14. Dissolved inorganic carbon data from 2010 and 2013 at the Gulf of Tehuantepec

    Chapa-Balcorta, Cecilia; Hernández-Ayón, José Martín; Beier Emilio, Durazo Reginaldo; Alin, Simone; López-Pérez, Andrés
    Measurements of dissolved inorganic carbon of 27 stations at the Gulf of Tehuantepec, México. Samples were taken during cruises carried out by the Mexican Navy. Secretaría de Marina Armada de Mexico. Stations sampled in June, 2010 on board of RV Altair, 9 were sampled on April 2013 onbord of RV Altair and 9 on October-November 2013 onboard of RV Río Suchiate. Measurements were carried out using the coulometric method described in Johnson et al (1987).

  15. Seasonal variations of Fucus vesiculosus fertility under ocean acidification and warming in the western Baltic Sea

    Graiff, Angelika; Dankworth, Marie; Wahl, Martin; Karsten, Ulf; Bartsch, Inka
    Ocean warming and acidification may substantially affect the reproduction of keystone species such as Fucus vesiculosus (Phaeophyceae). In four consecutive benthic mesocosm experiments, we compared the reproductive biology and quantified the temporal development of Baltic Sea Fucus fertility under the single and combined impact of elevated seawater temperature and pCO2 (1100 ppm). In an additional experiment, we investigated the impact of temperature (0-25°C) on the maturation of North Sea F. vesiculosus receptacles. A marked seasonal reproductive cycle of F. vesiculosus became apparent in the course of 1 year. The first appearance of receptacles on vegetative apices and the further development...

  16. Spatio-temporal dynamics of cod nursery areas in the Baltic Sea

    Hinrichsen, Hans-Harald; von Dewitz, Burkhard; Lehmann, Andreas; Bergström, Ulf; Hüssy, Karin
    In this study the drift of eastern Baltic cod larvae and juveniles spawned within the historical eastern Baltic cod spawning grounds was investigated by detailed drift model simulations for the years 1971 to 2010, to examine the spatio-temporal dynamics of environmental suitability in the nursery areas of juvenile cod settlement. The results of the long-term model scenario runs, where juvenile cod were treated as simulated passively drifting particles, enabled us to find strong indications for long-term variations of settlement and potentially the reproduction success of the historically important eastern Baltic cod nursery grounds. Only low proportions of juveniles hatched in...

  17. How internal waves in the Tyrrhenian Sea affect meso-scale eddies and thermohaline staircases - insights from seismic oceanography

    Buffet, G; Krahmann, Gerd; Klaeschen, Dirk; Schroeder, Karin; Sallarès, C; Papenberg, Cord; Ranero, César; Zitellini, N

  18. Geochemistry and stable oxygen record of sediment core PS009PC

    Hennekam, Rick; Jilbert, Tom; Schnetger, Bernhard; de Lange, Gert Jan
    We present high-resolution records for oxygen isotopes of the planktic foraminifer Globigerinoides ruber (?18Oruber) and bulk sediment inorganic geochemistry for Holocene-age sediments from the southeast Mediterranean. Our ?18Oruber record appears to be dominated by Nile discharge rather than basin-scale salinity/temperature changes. Nile discharge was enhanced in the early to middle Holocene relative to today. The timing of the long-term maximum in Nile discharge during the early Holocene corresponds to the timing of maximum intensity of the Indian Ocean-influenced Southwest Indian summer monsoon (SIM). This coincidence suggests a major influence of an Indian Ocean moisture source on Nile discharge in the...

  19. Dissolved inorganic carbon, temperature and salinity measurement in the Gulf of Tehuantepec

    Chapa-Balcorta, Cecilia; Hernández-Ayón, José Martín; Beier Emilio, Durazo Reginaldo; Alin, Simone; López-Pérez, Andrés
    Temperature (C°), practical salinity and pressure (dB) data recorded at the Gulf of Tehuantepec during three sampling cruises carried out by the Secretaría de Marina Armada de Mexico. Measurements of dissolved inorganic carbon or 27 stations at the Gulf of Tehuantepec, México.

  20. Model results, link to archive file

    Ziemer, Corinna; Wacker, Ulrike
    The evolution of a hydrometeor ensemble ("cloud" ) can be described using a balance equation for its size spectrum. In numerical weather prediction or climate models, however, this approach is too time consuming. It is therefore necessary to capture, if only approximately, the on-going microphysical processes in a cloud using a parame- terised form of modelling. The parameterisation of sedimentation alone is already a demanding task. If its standard form is used in a two-moment scheme, the mean mass of the hydrometeors will be too large for a cloud physics context. Existing approaches try to avoid excessively large mean masses...

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