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  • PANGAEA  (318)
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  • 11
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    PanCount - an Excel-sheet to use the keyboard as a counting device (2016)
    PANGAEA
    In:  MARUM - Center for Marine Environmental Sciences, University Bremen
    Details
    Publication Date: 2023-01-13
    Type: Dataset
    Format: application/zip, 229.9 kBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 12
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    Results of Heinrich event 1 simulation from the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model (CCSM3) (2013)
    PANGAEA
    In:  Supplement to: Handiani, Dian Noor; Paul, André; Prange, Matthias; Merkel, Ute; Dupont, Lydie M; Zhang, Xiao (2013): Tropical vegetation response to Heinrich Event 1 as simulated with the UVic ESCM and CCSM3. Climate of the Past, 9(4), 1683-1696, https://doi.org/10.5194/cp-9-1683-2013
    Details
    Publication Date: 2023-01-13
    Description: We investigated changes in tropical climate and vegetation cover associated with abrupt climate change during Heinrich Event 1 (HE1, ca. 17.5 ka BP) using two different global climate models: the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model version 3 (CCSM3). Tropical South American and African pollen records suggest that the cooling of the North Atlantic Ocean during HE1 influenced the tropics through a southward shift of the rain belt. In this study, we simulated the HE1 by applying a freshwater perturbation to the North Atlantic Ocean. The resulting slowdown of the Atlantic Meridional Overturning Circulation was followed by a temperature seesaw between the Northern and Southern Hemispheres, as well as a southward shift of the tropical rain belt. The shift and the response pattern of the tropical vegetation around the Atlantic Ocean were more pronounced in the CCSM3 than in the UVic ESCM simulation. For tropical South America, opposite changes in tree and grass cover were modeled around 10° S in the CCSM3 but not in the UVic ESCM. In tropical Africa, the grass cover increased and the tree cover decreased around 15° N in the UVic ESCM and around 10° N in the CCSM3. In the CCSM3 model, the tree and grass cover in tropical Southeast Asia responded to the abrupt climate change during the HE1, which could not be found in the UVic ESCM. The biome distributions derived from both models corroborate findings from pollen records in southwestern and equatorial western Africa as well as northeastern Brazil.
    Keywords: Description; File name; File size; File type; Uniform resource locator/link to model result file
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 13
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    Pollen, microcharcoal and benthic foraminifera oxygen isotope data of IODP Site U1479 (2020)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Description: This study presents pollen, microcharcoal and benthic foraminifera oxygen isotope records generated from International Ocean Discovery Program (IODP) Exp. 361 Site U1479 from the Cape Basin offshore of South Africa for the period between 3.337 and 2.875 Ma. With an average sample resolution of 3 ka, this record represents the yet highest-resolution record of mPWP vegetation change from the region.
    Keywords: Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 14
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    Pollen and spores and micro-charcoal of IODP Site 361-U1479 (0-300ka) (2021)
    PANGAEA
    Details
    Publication Date: 2023-04-15
    Description: To obtain a continuous vegetation record of the ancient climate cycles, we studied pollen, spores and micro-charcoal of deep-sea sediments from IODP Site U1479 retrieved from SW of Cape Town. We compared our palynological results of the Pleistocene with previously published results of Pliocene material from the same site. We found that the vegetation of the Greater Cape Floristic Region, in particular Fynbos and Afrotemperate forest, respond to precessional forcing of climate, probably induced by the latitudinal insolation gradient. The micro-charcoal record confirms the importance of fires in the Fynbos vegetation. In addition, lowering of sea-level during the Pleistocene glacials enlarged the terrestrial environment substantially. The expansion of the Palaeo-Agulhas Plain extended the Ericaceae-rich and Asteraceae-rich types of Fynbos, at least on the western part of the plain.
    Keywords: Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; IODP Expedition 361 U1479; micro-charcoal; Pleistocene; pollen and spores
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 15
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    n-Alkanes and compound-specific isotopes in the Orange River system (2017)
    PANGAEA
    In:  Supplement to: Burdanowitz, Nicole; Dupont, Lydie M; Zabel, Matthias; Schefuß, Enno (2018): Holocene hydrologic and vegetation developments in the Orange River catchment (South Africa) and their controls. The Holocene, 28(8), 1288-1300, https://doi.org/10.1177/0959683618771484
    Details
    Publication Date: 2023-06-15
    Description: The summer rainfall zone (SRZ) in the South African interior experienced pronounced hydrological and vegetation changes during the Holocene inferred to be driven mainly by shifts in atmospheric and oceanic circulations systems. The exact mechanisms controlling these changes are still debated. To gain better insights into the Holocene environmental changes in the South African SRZ and their driving factors, we analysed compound-specific carbon and hydrogen isotopes of plant wax n-alkanes (δ13Cwax and δDwax) from a marine sediment core covering the last 9900 years. The core has been recovered offshore the mouth of the Orange River, predominantly draining the South African summer rainfall region. Our data indicate a dry early Holocene and a gradual increase of wetter conditions with a higher abundance of C4 vegetation towards the middle Holocene. Wettest conditions occurred around 3900 cal. yr BP. The last 3900 years were characterised by a gradual aridification overlain by variable wetter conditions. During the 'Little Ice Age' (LIA: ca. 640–310 cal. yr BP), relatively dry conditions with elevated C4 plant contributions occurred. This opposite behaviour, that is, more C4 plant contribution during drier conditions compared to the remainder of the Holocene, points towards an influence of winter rainfall in the lower Orange River catchment during the late-Holocene and a decline in summer rainfall. We emphasise the importance of changes in the latitudinal insolation gradient (LIG) as a potentially important controlling mechanism for hydrologic and vegetation changes in the SRZ.
    Keywords: Center for Marine Environmental Sciences; MARUM; RAiN; Regional Archives for Integrated iNvestigations
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 16
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    Lipid biomarkers of samples from the Orange River, South Africa (2017)
    PANGAEA
    Details
    Publication Date: 2023-06-15
    Keywords: Center for Marine Environmental Sciences; Event label; Latitude of event; Longitude of event; MARUM; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; ORF_23; ORF_24S; ORF_25; ORF_26; ORF_27S; ORF_29B; ORF_29S; ORF_29T; ORF_31S; ORF_33; ORF_34S; ORF_35; ORF_36S; ORF_37; ORF_40; RAiN; Regional Archives for Integrated iNvestigations
    Type: Dataset
    Format: text/tab-separated-values, 110 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 17
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    Microcharcoal concentration of IODP Site 361-U1479 (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 361-U1479; AGE; COMPCORE; Composite Core; Exp361; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Microcharcoal; South African Climates (Agulhas LGM Density Profile)
    Type: Dataset
    Format: text/tab-separated-values, 151 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 18
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    Benthic foraminifera oxygen isotope data of IODP Site 361-U1479 (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 361-U1479; AGE; Cibicidoides wuellerstorfi, δ18O; COMPCORE; Composite Core; DEPTH, sediment/rock; Exp361; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; South African Climates (Agulhas LGM Density Profile)
    Type: Dataset
    Format: text/tab-separated-values, 106 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 19
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    Iron and calcium x-ray fluorescence (XRF) scannings of sediment core GeoB9311-1 (2016)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 18; AFRIDEEP; AGE; Calcium; Center for Marine Environmental Sciences; DEPTH, sediment/rock; GeoB9311-1; Gravity corer (Kiel type); Iron; M63/1; MARUM; Meteor (1986); Sambesi Fan; SL; X-ray fluorescence core scanner (XRF) I, Bremen
    Type: Dataset
    Format: text/tab-separated-values, 1478 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 20
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    N-alkane homologue records (stable hydrogen and carbon isotopes, concentrations) of sediment core GeoB10053-7 (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Difference; GeoB10053-7; Gravity corer (Kiel type); MARUM; n-Alkane C29; n-Alkane C29, δ13C; n-Alkane C29, δD; n-Alkane C31; n-Alkane C31, δ13C; n-Alkane C31, δD; n-Alkane C33; n-Alkane C33, δ13C; n-Alkane C33, δD; PABESIA; SL; SO184/2; Sonne
    Type: Dataset
    Format: text/tab-separated-values, 1139 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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