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Datasets of project "Center for Marine Environmental Sciences"

Mostrando recursos 1 - 20 de 4.383

  1. Organic matter and sediment properties of samples from site GeoB15105 from the Black Sea

    Schmidt, Frauke; Koch, Boris P; Witt, Matthias; Hinrichs, Kai-Uwe
    Dissolved organic matter (DOM) in marine sediments is a complex mixture of thousands of individual constituents that participate in biogeochemical reactions and serve as substrates for benthic microbes. Knowledge of the molecular composition of DOM is a prerequisite for a comprehensive understanding of the biogeochemical processes in sediments. In this study, interstitial water DOM was extracted with Rhizon samplers from a sediment core from the Black Sea and compared to the corresponding water-extractable organic matter fraction (<0.4 µm) obtained by Soxhlet extraction, which mobilizes labile particulate organic matter and DOM. After solid phase extraction (SPE) of DOM, samples were analyzed...

  2. Dissolved organic carbon and total dissolved nitrogen of sample site GeoB15105

    Schmidt, Frauke; Koch, Boris P; Witt, Matthias; Hinrichs, Kai-Uwe

  3. Planktic foraminiferal Mg/Ca and oxygen isotopes, plus estimated d18Oseawater and ice volume corrected d18Oseawater for the past 35000 years of sediment core GeoB10069-3

    Gibbons, Fern T; Oppo, Delia W; Mohtadi, Mahyar; Rosenthal, Yair; Cheng, Jun; Liu, Zhengyu; Linsley, Braddock K
    Evidence from geologic archives suggests that there were large changes in the tropical hydrologic cycle associated with the two prominent northern hemisphere deglacial cooling events, Heinrich Stadial 1 (HS1; ~19 to 15 kyr BP; kyr BP = 1000 yr before present) and the Younger Dryas (~12.9 to 11.7 kyr BP). These hydrologic shifts have been alternatively attributed to high and low latitude origin. Here, we present a new record of hydrologic variability based on planktic foraminifera-derived d18O of seawater (d18Osw) estimates from a sediment core from the tropical Eastern Indian Ocean, and using 12 additional d18Osw records, construct a single...

  4. Principal component analysis of sediment core GeoB10069-3

    Gibbons, Fern T; Oppo, Delia W; Mohtadi, Mahyar; Rosenthal, Yair; Cheng, Jun; Liu, Zhengyu; Linsley, Braddock K

  5. Mg/Ca measurement and oxygen isotope ratios of sediment core GeoB10069-3

    Gibbons, Fern T; Oppo, Delia W; Mohtadi, Mahyar; Rosenthal, Yair; Cheng, Jun; Liu, Zhengyu; Linsley, Braddock K

  6. Loadings for the principal components of sediment cores from the Indo-Pacific and Eastern Equatorial Pacific

    Gibbons, Fern T; Oppo, Delia W; Mohtadi, Mahyar; Rosenthal, Yair; Cheng, Jun; Liu, Zhengyu; Linsley, Braddock K

  7. Total organic matter and sediment properties of samples from sample site GeoB15105

    Schmidt, Frauke; Koch, Boris P; Witt, Matthias; Hinrichs, Kai-Uwe

  8. Radiocarbon dates and their calendar age conversions for sediment cores from the Indo-Pacific and Eastern Equatorial Pacific

    Gibbons, Fern T; Oppo, Delia W; Mohtadi, Mahyar; Rosenthal, Yair; Cheng, Jun; Liu, Zhengyu; Linsley, Braddock K

  9. Shoreline change on nine reef islands over a seven-decade period

    Mann, Thomas; Westphal, Hildegard
    Atoll islands are subject to a variety of processes that influence their geomorphological development. Analysis of historical shoreline changes using remotely sensed images has become an efficient approach to both quantify past changes and estimate future island response. However, the detection of long-term changes in beach width is challenging mainly for two reasons: first, data availability is limited for many remote Pacific islands. Second, beach environments are highly dynamic and strongly influenced by seasonal or episodic shoreline oscillations. Consequently, remote-sensing studies on beach morphodynamics of atoll islands deal with dynamic features covered by a low sampling frequency. Here we present...

  10. Shoreline change on reef island NN 1 over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  11. Shoreline change on reef island Latuma over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  12. Shoreline change on reef island Kapeiatu over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  13. Shoreline change on reef island Nukúturua over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  14. Shoreline change on reef island Takú over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  15. Shoreline change on reef island Farafatu over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  16. Shoreline change on reef island Nukutoa over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  17. Shoreline change on reef island Maturi over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  18. Shoreline change on reef island Karuteke over a seven-decade period

    Mann, Thomas; Westphal, Hildegard

  19. Electron spin resonance (ESR) and 14C dating in sediments of Bonaire, Leeward Antilles

    Scheffers, Anja M; Engel, Max; May, S Matthias; Scheffers, Sander R; Joannes-Boyau, Renaud; Hänssler, Elke; Kennedy, Katharina; Kelletat, Dieter; Brückner, Helmut; Vött, Andreas; Schellmann, Gerhard; Schäbitz, Frank; Radtke, Ulrich; Sommer, Brigitte; Willershäuser, Timo; Felis, Thomas
    The coastal deposits of Bonaire, Leeward Antilles, are among the most studied archives for extreme-wave events (EWEs) in the Caribbean. Here we present more than 400 electron spin resonance (ESR) and radiocarbon data on coarse-clast deposits from Bonaire's eastern and western coasts. The chronological data are compared to the occurrence and age of fine-grained extreme-wave deposits detected in lagoons and floodplains. Both approaches are aimed at the identification of EWEs, the differentiation between extraordinary storms and tsunamis, improving reconstructions of the coastal evolution, and establishing a geochronological framework for the events. Although the combination of different methods and archives contributes...

  20. (Supplementary Table 4) Radiometric 14C data from coral ridges and boulders on Bonaire Island, Southern Caribbean

    Scheffers, Anja M; Engel, Max; May, S Matthias; Scheffers, Sander R; Joannes-Boyau, Renaud; Hänssler, Elke; Kennedy, Katharina; Kelletat, Dieter; Brückner, Helmut; Vött, Andreas; Schellmann, Gerhard; Schäbitz, Frank; Radtke, Ulrich; Sommer, Brigitte; Willershäuser, Timo; Felis, Thomas

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