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  • 2020-2024  (53)
  • 1995-1999
  • 2021  (13)
  • 2020  (40)
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  • 1
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    Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise (2020)
    Elsevier BV
    In:  EPIC3Quaternary Science Reviews, Elsevier BV, 231, pp. 106202-106202, ISSN: 0277-3791
    Details
    Publication Date: 2023-05-31
    Description: To identify environmental causes for past changes in vegetation in subtropical East Asia, we present carbon isotope compositions of plant-wax n-alkanes and provide estimates of the C4-plant contribution across the past four glacial terminations and interglacials, based on cores recovered from the northern South China Sea. Our results show a comparable C4-plant contribution between the Last Glacial Maximum (LGM) and the Holocene. An increase of the C4-plant contribution by 15–20% is found for Terminations IV, II and I relative to subsequent interglacial peaks, coeval with an expansion of Cyperaceae and Poaceae. In contrast, Termination V reveals a lower C4-plant contribution than Marine Isotope Stage (MIS) 11c. The data exhibit a long-term trend, with a stepwise increase of the C4-plant contribution across interglacials MIS 11c, 9e, 7e and 1. We suggest that no substantial changes in humidity levels over glacial-interglacial cycles occurred facilitating a similar C3/C4-plant ratio for the LGM and the Holocene. Instead, deglacial sea-level rises caused an extensive development of floodplains and wetlands on the exposed continental shelf, providing habitats for the spread of C4 sedges and grasses. The progressive subsidence of Chinese coastal areas and the broadening of the continental shelf over the late Quaternary explains the nearly absence of C4 plant occurrence during Termination V and a gradual increase of the C4-plant contribution across interglacial peaks. Taken together, changes in coastal environments should be considered when interpreting marine-based vegetation reconstructions from subtropical Asia.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 2
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    The nature, timescale, and efficiency of riverine export of terrestrial organic carbon in the (sub)tropics: Insights at the molecular level from the Pearl River and adjacent coastal sea (2021)
    In:  EPIC3Earth and Planetary Science Letters, 565, pp. 116934, ISSN: 0012821X
    Details
    Publication Date: 2023-06-21
    Description: Tropical and subtropical rivers deliver large quantities of terrestrial organic carbon (OCterr) to the ocean, acting as a crucial part of the global carbon cycle, but little is known about the timescale and efficiency of its transport to and in the adjacent coastal sea. Here we examined source-specific biomarker (fatty acids, FAs) contents and isotope compositions in surface sediments in an alongshore transect southwestward from the Pearl River mouth. The C28+30, rather than other long-chain saturated FAs, were found to be the most representative for OCterr, and a plant wax mean age of 3060 ±90 yr (resulting from protracted storage) was estimated in the Pearl River watershed from the 14C age of C28+30FA in a river mouth sample. A compilation of plant wax mean ages in global (sub)tropical river systems including this study suggests that regional differences in climate and morphology may have a limited impact on plant wax mean ages in (sub)tropical regions. A four-source mixing model based on bulk OC and biomarker isotope compositions demonstrated that surface sediments in the Pearl River-derived mudbelt consist of 0.15–0.36 wt.% marine OC, 0.03–0.13 wt.% riverine primary production-derived OC, 0.18–0.49 wt.% soil OC, and 0.07–0.16 wt.% fossil OC. The mean burial efficiency of fossil and soil OC is ∼85% and 49%, respectively, indicating the refractory nature of fossil OC but a significant loss of soil OC due to remineralization during transport in the marine environment before final burial. Over longer timescales, the OCterrloss experienced during transport may, thus, to some extent reduces the capacity of terrestrial ecosystems (particularly soils) as CO2sinks.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 3
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    Fractional abunandces of isoprenoid GDGTs in surface sediments off Indonesia (2020)
    PANGAEA
    Details
    Publication Date: 2023-02-07
    Description: Fractional abunances of isoprenoid GDGTs calculated from the peak areas detected for the molecule peaks in the HPLC chromatograms. These data are an addition to the already archived TEX86 and UK'37 data in core-top sediments from off Indonesia (doi:10.1594/PANGAEA.823057).
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Crenarchaeol, fractional abundance; Crenarchaeol isomer, fractional abundance; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Elevation of event; Event label; fractional abundance; GDGTs; GeoB10008-4; GeoB10010-1; GeoB10014-1; GeoB10015-1; GeoB10016-2; GeoB10022-3; GeoB10024-3; GeoB10025-3; GeoB10026-2; GeoB10027-3; GeoB10028-4; GeoB10029-3; GeoB10031-3; GeoB10032-1; GeoB10033-5; GeoB10034-3; GeoB10036-3; GeoB10037-2; GeoB10038-3; GeoB10039-3; GeoB10040-3; GeoB10041-3; GeoB10043-2; GeoB10044-3; GeoB10047-1; GeoB10049-5; GeoB10050-1; GeoB10058-1; GeoB10059-1; GeoB10061-5; GeoB10063-5; GeoB10064-5; GeoB10066-6; GeoB10067-5; GeoB10068-1; GeoB10069-4; High Performance Liquid Chromatography (HPLC); Latitude of event; Longitude of event; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; MSN; MUC; MultiCorer; Multiple opening/closing net; PABESIA; SO184/1; SO184/2; Sonne; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance
    Type: Dataset
    Format: text/tab-separated-values, 288 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Oxygen isotopes from ostracod shells of a sediment core from Lake Tislit (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: African Humid Period; Candona sp., juvenile, δ13C; Candona sp., juvenile, δ18O; DEPTH, sediment/rock; Green Sahara; High Atlas Mountains, Marocco; Holocene; Lake_Tislit; Palaeoclimate reconstructions; RUSC; Russian corer; vegetation model simulations
    Type: Dataset
    Format: text/tab-separated-values, 348 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Precipitation pollen-based climate reconstruction of a sediment core from Lake Tislit (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: African Humid Period; DEPTH, sediment/rock; Green Sahara; High Atlas Mountains, Marocco; Holocene; Lake_Tislit; Palaeoclimate reconstructions; Precipitation, April; Precipitation, August; Precipitation, December; Precipitation, February; Precipitation, January; Precipitation, July; Precipitation, June; Precipitation, March; Precipitation, May; Precipitation, November; Precipitation, October; Precipitation, September; RUSC; Russian corer; Transfer Function Technique (TFT); vegetation model simulations
    Type: Dataset
    Format: text/tab-separated-values, 1932 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Temperature pollen-based climate reconstructionof a sediment core from Lake Tislit (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: African Humid Period; DEPTH, sediment/rock; Green Sahara; High Atlas Mountains, Marocco; Holocene; Lake_Tislit; Palaeoclimate reconstructions; RUSC; Russian corer; Temperature, calculated; Transfer Function Technique (TFT); vegetation model simulations
    Type: Dataset
    Format: text/tab-separated-values, 1932 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Lipid biomarker and bulk organic matter concentrations and carbon and hydrogen isotope data from sediment cores GeoB7805-1 and GeoB7807-2 (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-20
    Description: The data set contains lipid biomarker and bulk organic matter data from two sediment cores in the Shaban Deep, in the northern Red Sea. One core is deposited in the hypersaline brine (GeoB7805-1 2) and the other core (GeoB7807-2) is deposited outside the brine. The data set compares the lipid biomarker signals in the two deposition settings. For both cores the data set contains total organic carbon data, total nitrogen data, bulk organic matter carbon and hydrogen isotope data, long-chain n-alkane concentrations, alkenone concentrations, long- and short-chain fatty acid concentrations, long-chain n-alkane and long-chain fatty acid average chain length and carbon preference index data, UK37 data, stable carbon and hydrogen isotope data for long-chain n-alkanes, alkenones, and long- and short chain fatty acids.
    Keywords: Alkenones; Center for Marine Environmental Sciences; fatty acids; lipid biomarkers; marine organic matter degradation; MARUM; n-alkanes; particulate organic matter; Red Sea; Shaban Deep; stable carbon isotopes δ13C; stable hydrogen isotopes δ2H
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Radiocarbon dates of a sediment core from Lake Tislit (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-16
    Keywords: African Humid Period; Age, 14C calibrated, IntCal13 (Reimer et al., 2013); Age, dated; Age, dated standard deviation; Calendar age, maximum/old; Calendar age, minimum/young; DEPTH, sediment/rock; Green Sahara; High Atlas Mountains, Marocco; Holocene; Laboratory code/label; Lake_Tislit; Palaeoclimate reconstructions; Probability; RUSC; Russian corer; vegetation model simulations
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Pollen analyses of a sediment core from Lake Tislit (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-01
    Keywords: Acer; African Humid Period; Alisma; Alnus; Apiaceae; Artemisia; Asphodelus; Asteraceae; Berberis vulgaris; Boraginaceae; Brassicaceae; Calystegia fretes; Campanulaceae; Caryophyllaceae; Castilleja fissiflolia; Cedrus atlantica; Centaurea; Cereales; Chenopodiaceae; Cichorioideae; Cistus; Convolvulus althaeoides; Counting, palynology; Cupressaceae; Cyperaceae; Daphne; DEPTH, sediment/rock; Digitalis; Ephedra; Eucalyptus; Euphorbiaceae; Fabaceae; Fagus; Fraxinus; Geranium; Green Sahara; Helianthemum; Hibiscus; High Atlas Mountains, Marocco; Holocene; Ilex aquifolium; Illecebrum; Juncus; Lake_Tislit; Lamiaceae; Liliaceae; Linum; Lycopodium; Macrochloa tenacissima; Malva sylvestris; Myriophyllum spicatum; Nerium; Olea; Ostrya; Palaeoclimate reconstructions; Papaver; Pedicularis; Phillyrea; Pinus; Pistacia; Plantago; Poaceae; Polygonum; Populus; Potamogeton; Primulaceae; Pseudoschizaea circula; Quercus; Ranunculus; Rhus; Rosaceae; Rubiaceae; Rumex; RUSC; Russian corer; Salix; Salvadora; Saxifraga; Scabiosa; Scrophularia; Taxus; Typha angustifolia; Typha latifolia; Ulmaceae; Urtica; vegetation model simulations; Veronica; Vitis
    Type: Dataset
    Format: text/tab-separated-values, 12397 data points
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    DATA PANGAEA
  • 10
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    C4-plant abundance from site GeoB16602 (2020)
    PANGAEA
    Details
    Publication Date: 2023-12-18
    Keywords: AGE; Center for Marine Environmental Sciences; COMPCORE; Composite Core; Compound-specific carbon isotopes; East Asian monsoon; Estimated; GeoB16602; MARUM; n-Alkane C4 plant; Plant-wax lipids; South China Sea; Standard error; Vegetation composition
    Type: Dataset
    Format: text/tab-separated-values, 362 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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