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PANGAEA - Publishing Network for Geoscientific & Environmental Data (837.712 recursos)

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Citable datasets

Mostrando recursos 1 - 20 de 24.790

  1. Paleo Islands and Archipelago Configuration (PIAC) database

    Norder, Sietze Johannes; Baumgartner, J B; Borges, P A V; Hengl, Tomislav; Kissling, W D; Van Loon, E E; Rijsdijk, K F
    Here, we present the Paleo Islands and Archipelago Configuration (PIAC) database, containing sea level driven paleogeography changes over the late Quaternary of 178 islands in 27 archipelagos. The R functions developed to calculate archipelago configuration and paleo-area are provided to allow calculations for other islands, time steps, and higher spatiotemporal resolutions.

  2. Paleo Islands and Archipelago Configuration (PIAC) database

    Norder, Sietze Johannes; Baumgartner, J B; Borges, P A V; Hengl, Tomislav; Kissling, W D; Van Loon, E E; Rijsdijk, K F
    Here, we present the Paleo Islands and Archipelago Configuration (PIAC) database, containing sea level driven paleogeography changes over the late Quaternary of 178 islands in 27 archipelagos. The R functions developed to calculate archipelago configuration and paleo-area are provided to allow calculations for other islands, time steps, and higher spatiotemporal resolutions.

  3. Eddy-permitting and eddy-resolving simulations of the Fram Strait ocean dynamics with the Finite-Element Sea-Ice Ocean Model (FESOM), links to NetCDF files

    Wekerle, Claudia; Wang, Qiang; von Appen, Wilken-Jon; Danilov, Sergey; Schourup-Kristensen, Vibe; Jung, Thomas
    Eddy driven recirculation of Atlantic Water (AW) in the Fram Strait modifies the amount of heat that reaches the Arctic Ocean, but is difficult to constrain in ocean models due to very small Rossby radius there. In this study we explore the effect of resolved eddies on the AW circulation in a locally eddy-resolving simulation of the global Finite-Element-Sea ice-Ocean-Model (FESOM) integrated for the years 2000-2009, by focusing on the seasonal cycle. An eddy-permitting simulation serves as a control run. Our results suggest that resolving local eddy dynamics is critical to realistically simulate ocean dynamics in the Fram Strait. Strong...

  4. Impact of sedimentary degradation and deep water column production on GDGT abundance and distribution in surface sediments in the Arabian Sea

    Lengger, Sabine K; Hopmans, Ellen C; Sinninghe Damsté, Jaap S; Schouten, Stefan
    The TEX86 is a widely used paleotemperature proxy based on isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) produced by Thaumarchaeota. Archaeal membranes are composed of GDGTs with polar head groups (IPL-GDGTs), most of which are expected to be degraded completely or transformed into more recalcitrant core lipid (CL)-GDGTs upon cell lysis. Here, we examined the differences in concentration and distribution of core lipid (CL)- and intact polar lipid (IPL)-GDGTs in surface sediments at different deposition depths, and different oxygen bottom water concentrations (<3-83 µmol L-1). Surface sediments were sampled from 900 to 3000 m depth on a seamount (Murray Ridge), whose...

  5. Annotated record and Pb, Th, U and Ra isotope concentrations for two cores of the Atlantic and Pacific Ocean

    Kadko, David
    A model that predicts the flux of 222Rn out of deep-sea sediment is presented. The radon is ultimately generated by 230Th which is stripped from the overlying water into the sediment. It is shown that the continental contribution of ionium is not significant, and that at low sedimentation rates, biological mixing and erosional processes strongly affect the surface concentration of the ionium. Two cores from areas of slow sediment accumulation, one from a manganese nodule region of the central Pacific and one from the Rio Grande Rise in the Atlantic were analyzed at closely spaced intervals for 230Th, 226Ra, and...

  6. Major elements geochemistry of manganese nodules and ferromanganese crusts from the Pacific Ocean

    Mellin, Torgny A; Lei, Guobin
    Experimental substitutions of transition and alkaline earth cations into synthetic 10angstrom(Na-)-manganate show that cation uptake and the stability of the cation-substituted mineral increase with stability of the hydroxide of the cation. Hydrothermal treatment of synthetic 10angström-manganates with different metal contents as well as marine diagenetic and hydrothermal 10angstrom-manganates shows that the stabilities of their structures are enhanced with increasing temperature. The stabilization is due to reinforcement of the "tunnel" walls supporting the [Mn4+O62-] octaheral layers. The diagenetic 10angström-manganates have initially unstable buserite-like structures with each interlayer wall composed of two [Mn2+O3+x2-(OH-)3-x] octahedra (0 less-than-or-equal-to x less-than-or-equal-to 3) with either a...

  7. Methane and nitrous oxide concentration profiles, CTD and nutrient data from the Central Baltic Sea between March and December 2015, following the major Baltic Inflow of 2014

    Myllykangas, Jukka-Pekka; Jilbert, Tom; Jakobs, Gunnar; Rehder, Gregor; Werner, Jan; Hietanen, Susanna
    In late 2014, a large, oxygen-rich salt water inflow entered the Baltic Sea and caused considerable changes in deep water oxygen concentrations. We studied the effects of the inflow on the concentration patterns of two greenhouse gases, methane and nitrous oxide, during the following year (2015) in the water column of the Gotland Basin. In the Eastern basin, methane which had previously accumulated in the deep waters was largely removed during the year. Here, volume-weighted mean concentration below 70 m decreased from 108 nM in March to 16.3 nM over a period of 141 days (0.65 nM d-1), predominantly due...

  8. Modelling past, present and future peatland carbon accumulation across the pan-Arctic

    Chaudhary, Nitin; Miller, Paul A; Smith, Benjamin
    Most northern peatlands developed during the Holocene, sequestering large amounts of carbon in terrestrial ecosystems. However, recent syntheses have highlighted the gaps in our understanding of peatland carbon accumulation. Assessments of the long-term carbon accumulation rate and possible warming driven changes in these accumulation rates can therefore benefit from process-based modelling studies. We employed an individual- and patch-based dynamic global ecosystem model with dynamic peatland and permafrost functionality and vegetation dynamics to quantify long-term carbon accumulation rates and to assess the effects of historical and projected climate change on peatland carbon balances across the pan-Arctic. Our results are broadly consistent...

  9. pCO2 underway data from the Benguela Upwelling System in southeastern South Atlantic Ocean

    Emeis, Kay-Christian; Dähnke, Kirstin; Eggert, Anja; Flohr, Anita; Lahajnar, Niko; Nagel, Niko; Nausch, Birgit; Neumann, Andreas; Rixen, Tim; Schmidt, Martin; Wasmund, Norbert
    Within the BMBF funded project GENUS (Geochemistry and Ecology of the Namibian Upwelling System) the mole fraction of CO2 (xCO2) was measured in surface waters by using an underway pCO2 system (SUNDANS) duirng seven cruises. SUNDANS was developed by "marine analytics and data" (MARIANDA, Germany, www.marianda.com) according to the recommendations of the 2002 underway pCO2 system workshop in Miami. It was equipped with a shower type equilibrator, an open pre-equilibrator and a non-dispersive dual cell infrared gas analyzer (LI-7000). The LI-7000 was calibrated by using nitrogen gas (zero CO2) and a two additional standard gas for CO2. The standard gases...

  10. pCO2 underway data from the Benguela Upwelling System in southeastern South Atlantic Ocean

    Emeis, Kay-Christian; Dähnke, Kirstin; Eggert, Anja; Flohr, Anita; Lahajnar, Niko; Nagel, Niko; Nausch, Birgit; Neumann, Andreas; Rixen, Tim; Schmidt, Martin; Wasmund, Norbert
    Within the BMBF funded project GENUS (Geochemistry and Ecology of the Namibian Upwelling System) the mole fraction of CO2 (xCO2) was measured in surface waters by using an underway pCO2 system (SUNDANS) duirng seven cruises. SUNDANS was developed by "marine analytics and data" (MARIANDA, Germany, www.marianda.com) according to the recommendations of the 2002 underway pCO2 system workshop in Miami. It was equipped with a shower type equilibrator, an open pre-equilibrator and a non-dispersive dual cell infrared gas analyzer (LI-7000). The LI-7000 was calibrated by using nitrogen gas (zero CO2) and a two additional standard gas for CO2. The standard gases...

  11. pCO2 underway data from the Benguela Upwelling System in southeastern South Atlantic Ocean

    Emeis, Kay-Christian; Dähnke, Kirstin; Eggert, Anja; Flohr, Anita; Lahajnar, Niko; Nagel, Niko; Nausch, Birgit; Neumann, Andreas; Rixen, Tim; Schmidt, Martin; Wasmund, Norbert
    Within the BMBF funded project GENUS (Geochemistry and Ecology of the Namibian Upwelling System) the mole fraction of CO2 (xCO2) was measured in surface waters by using an underway pCO2 system (SUNDANS) duirng seven cruises. SUNDANS was developed by "marine analytics and data" (MARIANDA, Germany, www.marianda.com) according to the recommendations of the 2002 underway pCO2 system workshop in Miami. It was equipped with a shower type equilibrator, an open pre-equilibrator and a non-dispersive dual cell infrared gas analyzer (LI-7000). The LI-7000 was calibrated by using nitrogen gas (zero CO2) and a two additional standard gas for CO2. The standard gases...

  12. pCO2 underway data from the Benguela Upwelling System in southeastern South Atlantic Ocean

    Emeis, Kay-Christian; Dähnke, Kirstin; Eggert, Anja; Flohr, Anita; Lahajnar, Niko; Nagel, Niko; Nausch, Birgit; Neumann, Andreas; Rixen, Tim; Schmidt, Martin; Wasmund, Norbert
    Within the BMBF funded project GENUS (Geochemistry and Ecology of the Namibian Upwelling System) the mole fraction of CO2 (xCO2) was measured in surface waters by using an underway pCO2 system (SUNDANS) duirng seven cruises. SUNDANS was developed by "marine analytics and data" (MARIANDA, Germany, www.marianda.com) according to the recommendations of the 2002 underway pCO2 system workshop in Miami. It was equipped with a shower type equilibrator, an open pre-equilibrator and a non-dispersive dual cell infrared gas analyzer (LI-7000). The LI-7000 was calibrated by using nitrogen gas (zero CO2) and a two additional standard gas for CO2. The standard gases...

  13. Roosevelt Island Climate Evolution (RICE) ice core isotope record

    Bertler, Nancy A; Conway, Howard; Dahl-Jensen, Dorthe; Emanuelsson, Urban; Winstrup, Mai; Vallelonga, Paul T; Lee, James E; Brook, Edward J; Severinghaus, Jeffrey P; Fudge, Tyler J; Keller, Elizabeth D; Baisden, W Troy; Hindmarsh, Richard C A; Neff, Peter D; Blunier, Thomas; Edwards, Ross L; Mayewski, Paul A; Kipfstuhl, Sepp; Buizert, Christo; Canessa, Silvia; Dadic, Ruzica; Kjær, Helle A; Kurbatov, Andrei; Zhang, Dongqi; Waddington, Edwin D; Baccolo, Giovanni; Beers, Thomas; Brightley, Hannah J; Carter, Lionel; Clemens-Sewall, David; Ciobanu, Viorela G; Delmonte, Barbara; Eling, Lukas; Ellis, Aja A; Ganesh, Shruthi; Golledge, Nicholas R; Haines, Skylar A; Handley, Michael; Hawley, Robert L; Hogan, Chad M; Johnson, Katelyn M; Korotkikh, Elena; Lowry, Daniel P; Mandeno, Darcy; McKay, Robert M; Menking, James A; Naish, Timothy R; Noerling, Caroline; Ollive, Agathe; Orsi, Anais J; Proemse, Bernadette C; Pyne, Alexander R; Pyne, Rebecca L; Renwick, James; Scherer, Reed P; Semper, Stefanie; Simonsen, Marius; Sneed, Sharon B; Steig, Eric J; Tuohy, Andrea; Ulayottil Venugopal, Abhijith; Valero-Delgado, Fernando; Venkatesh, Janani; Wang, Feitang; Wang, Shimeng; Winski, Dominic A; Winton, Victoria H L; Whiteford, Arran; Xiao, Cunde; Yang, Jiao; Zhang, Xin
    High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979-2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past...

  14. Roosevelt Island Climate Evolution (RICE) ice core isotope record

    Bertler, Nancy A; Conway, Howard; Dahl-Jensen, Dorthe; Emanuelsson, Urban; Winstrup, Mai; Vallelonga, Paul T; Lee, James E; Brook, Edward J; Severinghaus, Jeffrey P; Fudge, Tyler J; Keller, Elizabeth D; Baisden, W Troy; Hindmarsh, Richard C A; Neff, Peter D; Blunier, Thomas; Edwards, Ross L; Mayewski, Paul A; Kipfstuhl, Sepp; Buizert, Christo; Canessa, Silvia; Dadic, Ruzica; Kjær, Helle A; Kurbatov, Andrei; Zhang, Dongqi; Waddington, Edwin D; Baccolo, Giovanni; Beers, Thomas; Brightley, Hannah J; Carter, Lionel; Clemens-Sewall, David; Ciobanu, Viorela G; Delmonte, Barbara; Eling, Lukas; Ellis, Aja A; Ganesh, Shruthi; Golledge, Nicholas R; Haines, Skylar A; Handley, Michael; Hawley, Robert L; Hogan, Chad M; Johnson, Katelyn M; Korotkikh, Elena; Lowry, Daniel P; Mandeno, Darcy; McKay, Robert M; Menking, James A; Naish, Timothy R; Noerling, Caroline; Ollive, Agathe; Orsi, Anais J; Proemse, Bernadette C; Pyne, Alexander R; Pyne, Rebecca L; Renwick, James; Scherer, Reed P; Semper, Stefanie; Simonsen, Marius; Sneed, Sharon B; Steig, Eric J; Tuohy, Andrea; Ulayottil Venugopal, Abhijith; Valero-Delgado, Fernando; Venkatesh, Janani; Wang, Feitang; Wang, Shimeng; Winski, Dominic A; Winton, Victoria H L; Whiteford, Arran; Xiao, Cunde; Yang, Jiao; Zhang, Xin
    High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979-2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past...

  15. Roosevelt Island Climate Evolution (RICE) ice core isotope record

    Bertler, Nancy A; Conway, Howard; Dahl-Jensen, Dorthe; Emanuelsson, Urban; Winstrup, Mai; Vallelonga, Paul T; Lee, James E; Brook, Edward J; Severinghaus, Jeffrey P; Fudge, Tyler J; Keller, Elizabeth D; Baisden, W Troy; Hindmarsh, Richard C A; Neff, Peter D; Blunier, Thomas; Edwards, Ross L; Mayewski, Paul A; Kipfstuhl, Sepp; Buizert, Christo; Canessa, Silvia; Dadic, Ruzica; Kjær, Helle A; Kurbatov, Andrei; Zhang, Dongqi; Waddington, Edwin D; Baccolo, Giovanni; Beers, Thomas; Brightley, Hannah J; Carter, Lionel; Clemens-Sewall, David; Ciobanu, Viorela G; Delmonte, Barbara; Eling, Lukas; Ellis, Aja A; Ganesh, Shruthi; Golledge, Nicholas R; Haines, Skylar A; Handley, Michael; Hawley, Robert L; Hogan, Chad M; Johnson, Katelyn M; Korotkikh, Elena; Lowry, Daniel P; Mandeno, Darcy; McKay, Robert M; Menking, James A; Naish, Timothy R; Noerling, Caroline; Ollive, Agathe; Orsi, Anais J; Proemse, Bernadette C; Pyne, Alexander R; Pyne, Rebecca L; Renwick, James; Scherer, Reed P; Semper, Stefanie; Simonsen, Marius; Sneed, Sharon B; Steig, Eric J; Tuohy, Andrea; Ulayottil Venugopal, Abhijith; Valero-Delgado, Fernando; Venkatesh, Janani; Wang, Feitang; Wang, Shimeng; Winski, Dominic A; Winton, Victoria H L; Whiteford, Arran; Xiao, Cunde; Yang, Jiao; Zhang, Xin
    High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979-2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past...

  16. Roosevelt Island Climate Evolution (RICE) ice core isotope record

    Bertler, Nancy A; Conway, Howard; Dahl-Jensen, Dorthe; Emanuelsson, Urban; Winstrup, Mai; Vallelonga, Paul T; Lee, James E; Brook, Edward J; Severinghaus, Jeffrey P; Fudge, Tyler J; Keller, Elizabeth D; Baisden, W Troy; Hindmarsh, Richard C A; Neff, Peter D; Blunier, Thomas; Edwards, Ross L; Mayewski, Paul A; Kipfstuhl, Sepp; Buizert, Christo; Canessa, Silvia; Dadic, Ruzica; Kjær, Helle A; Kurbatov, Andrei; Zhang, Dongqi; Waddington, Edwin D; Baccolo, Giovanni; Beers, Thomas; Brightley, Hannah J; Carter, Lionel; Clemens-Sewall, David; Ciobanu, Viorela G; Delmonte, Barbara; Eling, Lukas; Ellis, Aja A; Ganesh, Shruthi; Golledge, Nicholas R; Haines, Skylar A; Handley, Michael; Hawley, Robert L; Hogan, Chad M; Johnson, Katelyn M; Korotkikh, Elena; Lowry, Daniel P; Mandeno, Darcy; McKay, Robert M; Menking, James A; Naish, Timothy R; Noerling, Caroline; Ollive, Agathe; Orsi, Anais J; Proemse, Bernadette C; Pyne, Alexander R; Pyne, Rebecca L; Renwick, James; Scherer, Reed P; Semper, Stefanie; Simonsen, Marius; Sneed, Sharon B; Steig, Eric J; Tuohy, Andrea; Ulayottil Venugopal, Abhijith; Valero-Delgado, Fernando; Venkatesh, Janani; Wang, Feitang; Wang, Shimeng; Winski, Dominic A; Winton, Victoria H L; Whiteford, Arran; Xiao, Cunde; Yang, Jiao; Zhang, Xin
    High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979-2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past...

  17. Collection of data on belowground plant biomass and morphological root parameters in the Jena Experiment

    Bessler, Holger; Engels, Christoph; Ravenek, Janneke; Mommer, Liesje; de Kroon, Hans; Oram, Natalie; Chen, Hongmei; Weigelt, Alexandra; Luo, Guangjuan; Meyer, Sebastian Tobias
    This collection contains measurements of standing below ground biomass, belowground biomass productivity and morphological root parameters measured on the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the Main Experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and...

  18. Collection of data on belowground plant biomass and morphological root parameters in the Jena Experiment

    Bessler, Holger; Engels, Christoph; Ravenek, Janneke; Mommer, Liesje; de Kroon, Hans; Oram, Natalie; Chen, Hongmei; Weigelt, Alexandra; Luo, Guangjuan; Meyer, Sebastian Tobias
    This collection contains measurements of standing below ground biomass, belowground biomass productivity and morphological root parameters measured on the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the Main Experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and...

  19. Collection of data on belowground plant biomass and morphological root parameters in the Jena Experiment

    Bessler, Holger; Engels, Christoph; Ravenek, Janneke; Mommer, Liesje; de Kroon, Hans; Oram, Natalie; Chen, Hongmei; Weigelt, Alexandra; Luo, Guangjuan; Meyer, Sebastian Tobias
    This collection contains measurements of standing below ground biomass, belowground biomass productivity and morphological root parameters measured on the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the Main Experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and...

  20. Major, trace and rare earth elements geochemistry of manganese nodules from the DOMES, Site A area in the Pacific Ocean

    Calvert, Stephen E; Piper, David Z; Baedecker, Philip A
    The distribution of rare earth elements (REE) in ferromanganese nodules from DOMES Site A has been determined by instrumental neutron activation methods. The concentrations of the REE vary markedly. Low concentrations characterize samples from a depression (the valley), in which Quaternary sediments are thin or absent; high concentrations are found in samples from the surrounding abyssal hills (the highlands) where the Quaternary sediment section is relatively thick. Moreover, the valley nodules are strongly depleted in the light trivalent REE (LREE) and Ce compared with nodules from the highlands, some of the former showing negative Ce anomalies. The REE abundances in...

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