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650 Research products, page 1 of 65

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  • Open Access English
    Authors: 
    Lindhorst, Sebastian;
    Publisher: PANGAEA

    Sediment data from the Bahamian Santaren carbonate drift reveal the variability of trans-Atlantic Saharan dust transport back to about 100 ka BP (MIS 5.3) and demonstrate that carbonate drifts are a valuable pelagic archive of aeolian dust flux. Carbonate drift bodies are common around tropical carbonate platforms. They represent large-scale accumulations of ocean-current transported material, which originates from the adjacent shallow-water carbonate factory as well as from pelagic production, i.e. periplatform ooze. Subordinately, there is a clay- to silt-size non-carbonate fraction, which typically amounts to less than 10 % of the sediment volume and originates from aeolian and fluvial input. Sedimentation rates in the 5.42 m long core GeoHH-M95-524 recovered 25 km west of Great Bahama Bank in the Santaren Channel ranges from 1.5 to 24.5 cm ka-1 with lowest values during the last glacial lowstand and highest values following platform re-flooding around 8 ka BP. These sedimentation rates imply that carbonate drifts have not only the potential to resolve long-term environmental changes on orbital time scales, but also millennial to centennial fluctuations during interglacials. The sediment core has been investigated aiming on characterizing the lithogenic dust fraction. Laboratory analyses included XRF core scanning, determination of carbonate content, grain-size analyses (of bulk and terrigenous fraction), as well as visual inspections of the lithogenic residue; the age model is based on oxygen isotopes and radiocarbon ages. Data show that the input of aeolian dust in the periplatform ooze as indicated by Ti/Al and Fe/Al element ratios abruptly increases at 57 ka BP, stays elevated during glacial times, and reaches a Holocene minimum around 6.5 ka BP, contemporary to the African Humid Period. Subsequently, there is a gradual increase in dust flux which almost reaches glacial levels during the last centuries. Grain-size data show that the majority of dust particles fall into the fine silt range (below 10 µm); however, there is a pronounced coarse dust fraction in the size range up to 63 µm and individual 'giant' dust particles are up to 515 µm large. Total dust flux and the relative amounts of fine and coarse dust are decoupled. The time-variable composition of the grain-size spectrum is interpreted to reflect different dust transport mechanisms: fine dust particles are delivered by the trade winds and the geostrophic winds of the Saharan Air Layer, whereas coarse dust particles travel with convective storm systems. This mode of transport ensures continuous re-suspension of large particles and results in a prolonged transport. In this context, grain-size data from the terrigenous fraction of carbonate drifts provide a measure for past coarse dust transport, and consequently for the frequency of convective storm systems over the dust source areas and the tropical Atlantic.

  • Open Access
    Authors: 
    Schneider, Robert; Schmitt, Jochen; Koehler, Peter; Joos, Fortunat; Fischer, Hubertus;
    Project: EC | PAST4FUTURE (243908), SNSF | Climate and Environmental... (147174)

    The reconstruction of the stable carbon isotope evolution in atmospheric CO2 (d13Catm ), as archived in Antarctic ice cores, bears the potential to disentangle the contributions of the different carbon cycle fluxes causing past CO2 variations. Here we present a new record of d13Catm before, during and after the Marine Isotope Stage 5.5 (155 000 to 105 000 years BP). The record was derived with a well established sublimation method using ice from the EPICA Dome C (EDC) and the Talos Dome ice cores in East Antarctica. We find a 0.4 permil shift to heavier values between the mean d13Catm level in the Penultimate (~ 140 000 years BP) and Last Glacial Maximum (~ 22 000 years BP), which can be explained by either (i) changes in the isotopic composition or (ii) intensity of the carbon input fluxes to the combined ocean/atmosphere carbon reservoir or (iii) by long-term peat buildup. Our isotopic data suggest that the carbon cycle evolution along Termination II and the subsequent interglacial was controlled by essentially the same processes as during the last 24 000 years, but with different phasing and magnitudes. Furthermore, a 5000 years lag in the CO2 decline relative to EDC temperatures is confirmed during the glacial inception at the end of MIS 5.5 (120 000 years BP). Based on our isotopic data this lag can be explained by terrestrial carbon release and carbonate compensation.

  • Open Access English
    Authors: 
    Badger, Marcus P S; Chalk, Thomas B; Foster, Gavin L; Bown, Paul R; Gibbs, Samantha J; Sexton, Philip F; Schmidt, Daniela N; Pälike, Heiko; Mackensen, Andreas; Pancost, Richard D;
    Publisher: PANGAEA
    Project: EC | TGRES (340923)

    Atmospheric _p_CO~2~ is a critical component of the global carbon system and is considered to be the major control of Earth's past, present and future climate. Accurate and precise reconstructions of its concentration through geological time are, therefore, crucial to our understanding of the Earth system. Ice core records document _p_CO~2~ for the past 800 kyrs, but at no point during this interval were CO~2~ levels higher than today. Interpretation of older _p_CO~2~ has been hampered by discrepancies during some time intervals between two of the main ocean-based proxy methods used to reconstruct _p_CO~2~: the carbon isotope fractionation that occurs during photosynthesis as recorded by haptophyte biomarkers (alkenones) and the boron isotope composition (δ^11^B) of foraminifer shells. Here we present alkenone and δ^11^B-based _p_CO~2~ reconstructions generated from the same samples from the Plio-Pleistocene at ODP Site 999 across a glacial-interglacial cycle. We find a muted response to _p_CO~2~ in the alkenone record compared to contemporaneous ice core and δ^11^B records, suggesting caution in the interpretation of alkenone-based records at low _p_CO~2~ levels. This is possibly caused by the physiology of CO~2~ uptake in the haptophytes. Our new understanding resolves some of the inconsistencies between the proxies and highlights that caution may be required when interpreting alkenone-based reconstructions of _p_CO~2~.

  • Open Access English
    Authors: 
    Bunzel, Dorothea; Schmiedl, Gerhard; Lindhorst, Sebastian; Mackensen, Andreas; Reolid, Jesus; Romahn, Sarah; Betzler, Christian;
    Publisher: PANGAEA

    As a natural sediment trap, marine sediments of the sheltered central part of the Maldives Inner Sea represent an exceptional archive for paleoenvironmental and climate changes of the equatorial Indian Ocean. To evaluate the complex interplay between high-latitude and monsoonal climate variability, related dust fluxes, and regional oceanographic responses, we focused on Fe/Al, Ti/Al and Si/Ca ratios as proxies for terrigenous sediment delivery, and total organic carbon (TOC) and Br XRF counts as proxies for marine productivity. Benthic foraminiferal fauna distributions, grain size, and stable d18O and d13C data were used for evaluating changes in the benthic ecosystem, as well as changes in the intermediate water circulation, bottom water current velocity and oxygenation. Our multi-proxy data record reveals an enhanced dust supply during the glacial intervals, causing elevated Fe/Al and Si/Ca ratios, an overall coarsening of the sediment and an increasing amount of agglutinated benthic foraminifera. The enhanced dust fluxes can be attributed to higher dust availability in the Asian desert and loess areas and its transport by intensified winter monsoon winds during glacial conditions. These combined effects of wind-induced mixing of surface waters and dust fertilisation during the cold phases resulted in an increased surface-water productivity and related organic carbon fluxes. Thus, the development of highly diverse benthic foraminiferal faunas with certain detritus and suspension feeders were fostered. The difference in the d13C signal between epifaunal and deep infaunal benthic foraminifera reveals intermediate water oxygen concentrations between approximately 40 and 100 µmol kg-1 during this time. The precessional fluctuation pattern of oxygen changes resembles that from the deep Arabian Sea, suggesting an expansion of the Oxygen Minimum Zone (OMZ) from the Arabian Sea into the tropical Indian Ocean with a probable regional signal of strengthened winter-monsoon-induced organic matter fluxes and oxygen consumption, and further controlled by the varying inflow intensity of the Antarctic Intermediate Water (AAIW). In addition, the bottom water oxygenation pattern of the Maldives Inner Sea reveals a long phase of reduced ventilation during the last glacial period. This process is likely linked to the combined effects of generally enhanced oxygen consumption rates during high-productivity phases, reduced AAIW production, and the restriction of upper bathyal environments of the Inner Sea during sea-level lowstands. Thus, our multi-proxy record reflects a close linkage between the Indian monsoon oscillation, intermediate water circulation, productivity and sea-level changes on orbital time-scale.

  • Open Access

    The gCube System - workspace-application-handler -------------------------------------------------- The workspace-application-handler discovers from Application Profile the url of the application (gCube Apps) that can open the type of workspace item passed in input This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.2.0-4.6.1-126630 (2017-09-19) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Francesco Mangiacrapa (francesco.mangiacrapa-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" - CNR, Pisa (Italy). Maintainers ----------- * Francesco Mangiacrapa (francesco.mangiacrapa-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" - CNR, Pisa (Italy). Download information -------------------------------------------------- Source code is available from SVN: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/workspace-application-handler Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://wiki.gcube-system.org/gcube/index.php Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://wiki.gcube-system.org/gcube/index.php Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Open Access
    Authors: 
    Giancarlo Panichi;
    Publisher: Zenodo
    Project: EC | BlueBRIDGE (675680), EC | ENVRI (283465), EC | EUBRAZILOPENBIO (288754), EC | ENVRI PLUS (654182), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | EGI-Engage (654142), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | PARTHENOS (654119)

    The gCube System - tabular-data-unionwizard-widget -------------------------------------------------- tabular-data-unionwizard-widget allows the union of tabular resources This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.5.0-4.6.0-125889 (2017-08-01) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-unionwizard-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Open Access

    The gCube System - tabular-data-metadata-widget -------------------------------------------------- tabular-data-metadata-widget allows display metadata as accordion window This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.7.0-4.5.0-125840 (2017-06-11) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-metadata-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Research software . 2019
    Open Access
    Authors: 
    Massimiliano Assante;
    Publisher: Zenodo
    Project: EC | ENVRI (283465), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | ENVRI PLUS (654182), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | AGINFRA PLUS (731001), EC | PARTHENOS (654119), EC | EUBRAZILOPENBIO (288754), EC | BlueBRIDGE (675680),...

    gCube VRE Deploy Wizard Portlet. Support Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Changes in this version: Feature #5729, send email to infraManagers upon new VRE cretionsTask #10052, send email to infraManagers upon new VRE cretionsFeature #6315, remove the mandatory node in creation phase Older versions of this component are also published in Zenodo, but with a different naming. They can be found here. ──────────This software is part of the gCube Framework: an open-source software toolkit used for building and operating Hybrid Data Infrastructures. Find out more at https://www.gcube-system.org/.

  • Open Access
    Authors: 
    Giancarlo Panichi;
    Publisher: Zenodo
    Project: EC | ENVRI (283465), EC | ENVRI PLUS (654182), EC | BlueBRIDGE (675680), EC | EUBRAZILOPENBIO (288754), EC | PARTHENOS (654119), EC | EGI-Engage (654142), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | IMARINE (283644), EC | D4SCIENCE (212488)

    The gCube System - tabular-data-expression-widget -------------------------------------------------- tabular-data-expression-widget allows to create expression on tabular resource This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.10.0-4.6.0-148656 (2017-08-01) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-expression-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Research software . 2018
    Open Access
    Authors: 
    Gerasimos Farantatos; Mike Nikolopoulos; Konstantinos Giannakelos; Efthymios Theodorakopoulos; Vassilis Floros; Nikolas Laskaris;
    Publisher: Zenodo
    Project: EC | PARTHENOS (654119), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | EGI-Engage (654142), EC | ENVRI PLUS (654182), EC | ENVRI (283465), EC | EUBRAZILOPENBIO (288754), EC | BlueBRIDGE (675680), EC | AGINFRA PLUS (731001), EC | SoBigData (654024),...

    Geoanalytics is a web-based GIS system and light web project management platform that can be integrated at literally any Geo-oriented project. It can employ any WMS compliant backend for delivering its layered content and, based on the Open Layers framework, can consume literally any map provider. Installation Use the respective war Support Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Changes in this version: Layer attribute visualization bug fix ──────────This software is part of the gCube Framework: an open-source software toolkit used for building and operating Hybrid Data Infrastructures. Find out more at https://www.gcube-system.org/.

Advanced search in Research products
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The following results are related to European Marine Science. Are you interested to view more results? Visit OpenAIRE - Explore.
650 Research products, page 1 of 65
  • Open Access English
    Authors: 
    Lindhorst, Sebastian;
    Publisher: PANGAEA

    Sediment data from the Bahamian Santaren carbonate drift reveal the variability of trans-Atlantic Saharan dust transport back to about 100 ka BP (MIS 5.3) and demonstrate that carbonate drifts are a valuable pelagic archive of aeolian dust flux. Carbonate drift bodies are common around tropical carbonate platforms. They represent large-scale accumulations of ocean-current transported material, which originates from the adjacent shallow-water carbonate factory as well as from pelagic production, i.e. periplatform ooze. Subordinately, there is a clay- to silt-size non-carbonate fraction, which typically amounts to less than 10 % of the sediment volume and originates from aeolian and fluvial input. Sedimentation rates in the 5.42 m long core GeoHH-M95-524 recovered 25 km west of Great Bahama Bank in the Santaren Channel ranges from 1.5 to 24.5 cm ka-1 with lowest values during the last glacial lowstand and highest values following platform re-flooding around 8 ka BP. These sedimentation rates imply that carbonate drifts have not only the potential to resolve long-term environmental changes on orbital time scales, but also millennial to centennial fluctuations during interglacials. The sediment core has been investigated aiming on characterizing the lithogenic dust fraction. Laboratory analyses included XRF core scanning, determination of carbonate content, grain-size analyses (of bulk and terrigenous fraction), as well as visual inspections of the lithogenic residue; the age model is based on oxygen isotopes and radiocarbon ages. Data show that the input of aeolian dust in the periplatform ooze as indicated by Ti/Al and Fe/Al element ratios abruptly increases at 57 ka BP, stays elevated during glacial times, and reaches a Holocene minimum around 6.5 ka BP, contemporary to the African Humid Period. Subsequently, there is a gradual increase in dust flux which almost reaches glacial levels during the last centuries. Grain-size data show that the majority of dust particles fall into the fine silt range (below 10 µm); however, there is a pronounced coarse dust fraction in the size range up to 63 µm and individual 'giant' dust particles are up to 515 µm large. Total dust flux and the relative amounts of fine and coarse dust are decoupled. The time-variable composition of the grain-size spectrum is interpreted to reflect different dust transport mechanisms: fine dust particles are delivered by the trade winds and the geostrophic winds of the Saharan Air Layer, whereas coarse dust particles travel with convective storm systems. This mode of transport ensures continuous re-suspension of large particles and results in a prolonged transport. In this context, grain-size data from the terrigenous fraction of carbonate drifts provide a measure for past coarse dust transport, and consequently for the frequency of convective storm systems over the dust source areas and the tropical Atlantic.

  • Open Access
    Authors: 
    Schneider, Robert; Schmitt, Jochen; Koehler, Peter; Joos, Fortunat; Fischer, Hubertus;
    Project: EC | PAST4FUTURE (243908), SNSF | Climate and Environmental... (147174)

    The reconstruction of the stable carbon isotope evolution in atmospheric CO2 (d13Catm ), as archived in Antarctic ice cores, bears the potential to disentangle the contributions of the different carbon cycle fluxes causing past CO2 variations. Here we present a new record of d13Catm before, during and after the Marine Isotope Stage 5.5 (155 000 to 105 000 years BP). The record was derived with a well established sublimation method using ice from the EPICA Dome C (EDC) and the Talos Dome ice cores in East Antarctica. We find a 0.4 permil shift to heavier values between the mean d13Catm level in the Penultimate (~ 140 000 years BP) and Last Glacial Maximum (~ 22 000 years BP), which can be explained by either (i) changes in the isotopic composition or (ii) intensity of the carbon input fluxes to the combined ocean/atmosphere carbon reservoir or (iii) by long-term peat buildup. Our isotopic data suggest that the carbon cycle evolution along Termination II and the subsequent interglacial was controlled by essentially the same processes as during the last 24 000 years, but with different phasing and magnitudes. Furthermore, a 5000 years lag in the CO2 decline relative to EDC temperatures is confirmed during the glacial inception at the end of MIS 5.5 (120 000 years BP). Based on our isotopic data this lag can be explained by terrestrial carbon release and carbonate compensation.

  • Open Access English
    Authors: 
    Badger, Marcus P S; Chalk, Thomas B; Foster, Gavin L; Bown, Paul R; Gibbs, Samantha J; Sexton, Philip F; Schmidt, Daniela N; Pälike, Heiko; Mackensen, Andreas; Pancost, Richard D;
    Publisher: PANGAEA
    Project: EC | TGRES (340923)

    Atmospheric _p_CO~2~ is a critical component of the global carbon system and is considered to be the major control of Earth's past, present and future climate. Accurate and precise reconstructions of its concentration through geological time are, therefore, crucial to our understanding of the Earth system. Ice core records document _p_CO~2~ for the past 800 kyrs, but at no point during this interval were CO~2~ levels higher than today. Interpretation of older _p_CO~2~ has been hampered by discrepancies during some time intervals between two of the main ocean-based proxy methods used to reconstruct _p_CO~2~: the carbon isotope fractionation that occurs during photosynthesis as recorded by haptophyte biomarkers (alkenones) and the boron isotope composition (δ^11^B) of foraminifer shells. Here we present alkenone and δ^11^B-based _p_CO~2~ reconstructions generated from the same samples from the Plio-Pleistocene at ODP Site 999 across a glacial-interglacial cycle. We find a muted response to _p_CO~2~ in the alkenone record compared to contemporaneous ice core and δ^11^B records, suggesting caution in the interpretation of alkenone-based records at low _p_CO~2~ levels. This is possibly caused by the physiology of CO~2~ uptake in the haptophytes. Our new understanding resolves some of the inconsistencies between the proxies and highlights that caution may be required when interpreting alkenone-based reconstructions of _p_CO~2~.

  • Open Access English
    Authors: 
    Bunzel, Dorothea; Schmiedl, Gerhard; Lindhorst, Sebastian; Mackensen, Andreas; Reolid, Jesus; Romahn, Sarah; Betzler, Christian;
    Publisher: PANGAEA

    As a natural sediment trap, marine sediments of the sheltered central part of the Maldives Inner Sea represent an exceptional archive for paleoenvironmental and climate changes of the equatorial Indian Ocean. To evaluate the complex interplay between high-latitude and monsoonal climate variability, related dust fluxes, and regional oceanographic responses, we focused on Fe/Al, Ti/Al and Si/Ca ratios as proxies for terrigenous sediment delivery, and total organic carbon (TOC) and Br XRF counts as proxies for marine productivity. Benthic foraminiferal fauna distributions, grain size, and stable d18O and d13C data were used for evaluating changes in the benthic ecosystem, as well as changes in the intermediate water circulation, bottom water current velocity and oxygenation. Our multi-proxy data record reveals an enhanced dust supply during the glacial intervals, causing elevated Fe/Al and Si/Ca ratios, an overall coarsening of the sediment and an increasing amount of agglutinated benthic foraminifera. The enhanced dust fluxes can be attributed to higher dust availability in the Asian desert and loess areas and its transport by intensified winter monsoon winds during glacial conditions. These combined effects of wind-induced mixing of surface waters and dust fertilisation during the cold phases resulted in an increased surface-water productivity and related organic carbon fluxes. Thus, the development of highly diverse benthic foraminiferal faunas with certain detritus and suspension feeders were fostered. The difference in the d13C signal between epifaunal and deep infaunal benthic foraminifera reveals intermediate water oxygen concentrations between approximately 40 and 100 µmol kg-1 during this time. The precessional fluctuation pattern of oxygen changes resembles that from the deep Arabian Sea, suggesting an expansion of the Oxygen Minimum Zone (OMZ) from the Arabian Sea into the tropical Indian Ocean with a probable regional signal of strengthened winter-monsoon-induced organic matter fluxes and oxygen consumption, and further controlled by the varying inflow intensity of the Antarctic Intermediate Water (AAIW). In addition, the bottom water oxygenation pattern of the Maldives Inner Sea reveals a long phase of reduced ventilation during the last glacial period. This process is likely linked to the combined effects of generally enhanced oxygen consumption rates during high-productivity phases, reduced AAIW production, and the restriction of upper bathyal environments of the Inner Sea during sea-level lowstands. Thus, our multi-proxy record reflects a close linkage between the Indian monsoon oscillation, intermediate water circulation, productivity and sea-level changes on orbital time-scale.

  • Open Access

    The gCube System - workspace-application-handler -------------------------------------------------- The workspace-application-handler discovers from Application Profile the url of the application (gCube Apps) that can open the type of workspace item passed in input This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.2.0-4.6.1-126630 (2017-09-19) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Francesco Mangiacrapa (francesco.mangiacrapa-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" - CNR, Pisa (Italy). Maintainers ----------- * Francesco Mangiacrapa (francesco.mangiacrapa-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" - CNR, Pisa (Italy). Download information -------------------------------------------------- Source code is available from SVN: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/workspace-application-handler Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://wiki.gcube-system.org/gcube/index.php Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://wiki.gcube-system.org/gcube/index.php Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Open Access
    Authors: 
    Giancarlo Panichi;
    Publisher: Zenodo
    Project: EC | BlueBRIDGE (675680), EC | ENVRI (283465), EC | EUBRAZILOPENBIO (288754), EC | ENVRI PLUS (654182), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | EGI-Engage (654142), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | PARTHENOS (654119)

    The gCube System - tabular-data-unionwizard-widget -------------------------------------------------- tabular-data-unionwizard-widget allows the union of tabular resources This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.5.0-4.6.0-125889 (2017-08-01) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-unionwizard-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Open Access

    The gCube System - tabular-data-metadata-widget -------------------------------------------------- tabular-data-metadata-widget allows display metadata as accordion window This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.7.0-4.5.0-125840 (2017-06-11) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-metadata-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Research software . 2019
    Open Access
    Authors: 
    Massimiliano Assante;
    Publisher: Zenodo
    Project: EC | ENVRI (283465), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | ENVRI PLUS (654182), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | AGINFRA PLUS (731001), EC | PARTHENOS (654119), EC | EUBRAZILOPENBIO (288754), EC | BlueBRIDGE (675680),...

    gCube VRE Deploy Wizard Portlet. Support Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Changes in this version: Feature #5729, send email to infraManagers upon new VRE cretionsTask #10052, send email to infraManagers upon new VRE cretionsFeature #6315, remove the mandatory node in creation phase Older versions of this component are also published in Zenodo, but with a different naming. They can be found here. ──────────This software is part of the gCube Framework: an open-source software toolkit used for building and operating Hybrid Data Infrastructures. Find out more at https://www.gcube-system.org/.

  • Open Access
    Authors: 
    Giancarlo Panichi;
    Publisher: Zenodo
    Project: EC | ENVRI (283465), EC | ENVRI PLUS (654182), EC | BlueBRIDGE (675680), EC | EUBRAZILOPENBIO (288754), EC | PARTHENOS (654119), EC | EGI-Engage (654142), EC | SoBigData (654024), EC | D4SCIENCE-II (239019), EC | IMARINE (283644), EC | D4SCIENCE (212488)

    The gCube System - tabular-data-expression-widget -------------------------------------------------- tabular-data-expression-widget allows to create expression on tabular resource This software is part of the gCube Framework (https://www.gcube-system.org/): an open-source software toolkit used for building and operating Hybrid Data Infrastructures enabling the dynamic deployment of Virtual Research Environments by favouring the realisation of reuse oriented policies. The projects leading to this software have received funding from a series of European Union programmes including: * the Sixth Framework Programme for Research and Technological Development - DILIGENT (grant no. 004260); * the Seventh Framework Programme for research, technological development and demonstration - D4Science (grant no. 212488), D4Science-II (grant no. 239019),ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine (grant no. 283644); * the H2020 research and innovation programme - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024); Version -------------------------------------------------- 1.10.0-4.6.0-148656 (2017-08-01) Please see the file named "changelog.xml" in this directory for the release notes. Authors -------------------------------------------------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Maintainers ----------- * Giancarlo Panichi (giancarlo.panichi-AT-isti.cnr.it), Istituto di Scienza e Tecnologie dell'Informazione "A. Faedo" CNR, Pisa IT Download information -------------------------------------------------- Source code is available from SVN: https://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/user/tabular-data-expression-widget Binaries can be downloaded from the gCube website: https://www.gcube-system.org/ Installation -------------------------------------------------- Installation documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Documentation -------------------------------------------------- Documentation is available on-line in the gCube Wiki: https://gcube.wiki.gcube-system.org/gcube/index.php/Tabular_Data_Manager Support -------------------------------------------------- Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Licensing -------------------------------------------------- This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

  • Research software . 2018
    Open Access
    Authors: 
    Gerasimos Farantatos; Mike Nikolopoulos; Konstantinos Giannakelos; Efthymios Theodorakopoulos; Vassilis Floros; Nikolas Laskaris;
    Publisher: Zenodo
    Project: EC | PARTHENOS (654119), EC | IMARINE (283644), EC | D4SCIENCE (212488), EC | EGI-Engage (654142), EC | ENVRI PLUS (654182), EC | ENVRI (283465), EC | EUBRAZILOPENBIO (288754), EC | BlueBRIDGE (675680), EC | AGINFRA PLUS (731001), EC | SoBigData (654024),...

    Geoanalytics is a web-based GIS system and light web project management platform that can be integrated at literally any Geo-oriented project. It can employ any WMS compliant backend for delivering its layered content and, based on the Open Layers framework, can consume literally any map provider. Installation Use the respective war Support Bugs and support requests can be reported in the gCube issue tracking tool: https://support.d4science.org/projects/gcube/ Changes in this version: Layer attribute visualization bug fix ──────────This software is part of the gCube Framework: an open-source software toolkit used for building and operating Hybrid Data Infrastructures. Find out more at https://www.gcube-system.org/.