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  • Data  (1,479)
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  • 1
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    Unknown
    Physical oceanography and current meter data from mooring BO2 (2012)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-X/7; AWI_PhyOce; BO2; Current direction; Current velocity, east-west; Current velocity, horizontal; Current velocity, north-south; DATE/TIME; DEPTH, water; Gear identification number; Mooring (long time); MOORY; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS23 06AQANTX_7; Salinity; see comment for gear; South Atlantic Ocean; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 146595 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Physical oceanography and current meter data from mooring BO1 (2012)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-IX/2; AWI_PhyOce; BO1; Current direction; Current velocity, east-west; Current velocity, horizontal; Current velocity, north-south; DATE/TIME; DEPTH, water; Gear identification number; Mooring (long time); MOORY; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS18 06AQANTIX_2; Salinity; see comment for gear; South Atlantic Ocean; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 35961 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Physical oceanography and current meter data from mooring BO6 (2012)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-XIII/4; AWI_PhyOce; BO6; Current direction; Current velocity, east-west; Current velocity, horizontal; Current velocity, north-south; DATE/TIME; DEPTH, water; Gear identification number; Mooring (long time); MOORY; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS40 06AQANTXIII_4; see comment for gear; South Atlantic Ocean; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 139174 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Physical oceanography and current meter data from mooring WS2 (2012)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-V/4; AWI_PhyOce; Current direction; Current velocity, east-west; Current velocity, horizontal; Current velocity, north-south; DATE/TIME; DEPTH, water; Gear identification number; Mooring (long time); MOORY; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS10; Salinity; see comment for gear; Temperature, water; Weddell Sea; WS2
    Type: Dataset
    Format: text/tab-separated-values, 172595 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Station list and links to master tracks in different resolutions of POLARSTERN cruise ANT-IV/2, Rio de Janeiro - Punta Arenas, 1985-11-06 - 1985-12-02 (2016)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-IV/2; Calculated; Course; CT; DATE/TIME; LATITUDE; LONGITUDE; Polarstern; PS08; PS08/2-track; Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 7124 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Sediment echosounder (3.5 kHz) profiles of POLARSTERN cruise ANT-IV/2 (2013)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Keywords: ANT-IV/2; AWI_Paleo; Code; CT; DATE/TIME; File name; File size; LATITUDE; LONGITUDE; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS08; PS08/2-track; Underway cruise track measurements; Uniform resource locator/link to image
    Type: Dataset
    Format: text/tab-separated-values, 556 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Hydrogen isotopic composition of sediment cores from a transect off western Africa (2013)
    PANGAEA
    In:  Supplement to: Collins, James A; Schefuß, Enno; Mulitza, Stefan; Prange, Matthias; Werner, Martin; Tharammal, Thejna; Paul, André; Wefer, Gerold (2013): Estimating the hydrogen isotopic composition of past precipitation using leaf-waxes from western Africa. Quaternary Science Reviews, 65, 88-101, https://doi.org/10.1016/j.quascirev.2013.01.007
    Details
    Publication Date: 2023-03-03
    Description: The hydrogen isotopic composition of plant leaf-wax n-alkanes (dDwax) is a novel proxy for estimating dD of past precipitation (dDp). However, vegetation life-form and relative humidity exert secondary effects on dDwax, preventing quantitative estimates of past dDp. Here, we present an approach for removing the effect of vegetation-type and relative humidity from dDwax and thus for directly estimating past dDp. We test this approach on modern day (late Holocene; 0-3 ka) sediments from a transect of 9 marine cores spanning 21°N-23°S off the western coast of Africa. We estimate vegetation type (C3 tree versus C4 grass) using d13C of leaf-wax n-alkanes and correct dDwax for vegetation-type with previously-derived apparent fractionation factors for each vegetation type. Late Holocene vegetation-corrected dDwax (dDvc) displays a good fit with modern-day dDp, suggesting that the effects of vegetation type and relative humidity have both been removed and thus that dDvc is a good estimate of dDp. We find that the magnitude of the effect of C3 tree - C4 grass changes on dDwax is small compared to dDp changes. We go on to estimate dDvc for the mid-Holocene (6-8 ka), the Last Glacial Maximum (LGM; 19-23 ka) and Heinrich Stadial 1 (HS1; 16-18.5 ka). In terms of past hydrological changes, our leaf-wax based estimates of dDp mostly reflect changes in wet season intensity, which is complementary to estimates of wet season length based on leaf-wax d13C.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Pollen and spores of sites GeoB8331 and GeoB8323, Namaqualand Mudbelt, Holocene South Africa (2015)
    PANGAEA
    In:  Supplement to: Zhao, X; Dupont, Lydie M; Schefuß, Enno; Meadows, Michael E; Hahn, A; Wefer, Gerold (2016): Holocene vegetation and climate variability in the winter and summer rainfall zones of South Africa. The Holocene, 26(6), 843-857, https://doi.org/10.1177/0959683615622544
    Details
    Publication Date: 2023-03-03
    Description: To better understand Holocene vegetation and hydrological changes in South Africa, we analyzed pollen and microcharcoal records of two marine sites GeoB8331 and GeoB8323 from the Namaqualand mudbelt offshore the west coast of South Africa covering the last 9900 and 2200 years, respectively. Our data corroborate findings from literature that climate developments apparently contrast between the summer rainfall zone (SRZ) and winter rainfall zone (WRZ) over the last 9900 years, especially during the early and middle Holocene. During the early Holocene (9900-7800 cal.yr BP), a minimum of grass pollen suggests low summer rainfall in the SRZ, and the initial presence of Renosterveld vegetation indicates relatively wet conditions in the WRZ. Towards the middle Holocene (7800-2400 cal. yr BP), a rather moist savanna/grassland rich in grasses suggests higher summer rainfall in the SRZ resulting from increased austral summer insolation and a decline of fynbos vegetation accompanied by an increasing Succulent Karoo vegetation in the WRZ possibly suggests a southward shift of the Southern Hemisphere westerlies. During the last 2200 years, a trend towards higher aridity was observed for the SRZ, while the climate in the WRZ remained relatively stable. The Little Ice Age (ca. 700-200 cal. yr BP) was rather cool in both rainfall zones and drier in the SRZ while wetter in the WRZ.
    Keywords: Center for Marine Environmental Sciences; MARUM; RAiN; Regional Archives for Integrated iNvestigations
    Type: Dataset
    Format: application/zip, 8 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Fe/K-ratios and pollen analysis of ODP Site 202-1239 (2017)
    PANGAEA
    In:  Supplement to: Grimmer, Friederike; Dupont, Lydie M; Lamy, Frank; Jung, Gerlinde; González, Catalina; Wefer, Gerold (2018): Early Pliocene vegetation and hydrology changes in western equatorial South America. Climate of the Past, 14(11), 1739-1754, https://doi.org/10.5194/cp-14-1739-2018
    Details
    Publication Date: 2023-03-03
    Description: Vegetation and climate change in nortwestern South America were studied using pollen analysis in combination with XRF scanning on marine sediments of ODP Site 1239 from the East Equatorial Pacific comprising the interval between 4.7 and 4.2 Ma. The study site is sensitive to latitudinal shifts of the Intertropical Convergence Zone (ITCZ) shifts insofar as a southward (northward) shift would result in increased (decreased) precipitation over Ecuador. The presented pollen record (46 samples) comprises representatives from five ecological groups: lowland rainforest, lower montane forest, upper montane forest, páramo, and broad range taxa. A broad tropical rainforest coverage persisted in the study area throughout the early Pliocene, without significant open vegetation below the forest line. Between 4.7 and 4.42 Ma, humidity increases, reaching its peak around 4.42 Ma, and slightly decreasing again afterwards. The stable, permanently humid conditions are rather in agreement with paleoceanographic data indicating a southward shift of the ITCZ, possibly in response to closure of the Central American Seaway. The presence of páramo vegetation indicates that the Western Cordillera of the northern Andes had already reached considerable elevation by the early Pliocene. The trend in iron/potassium-ratios (Fe/K) is similar to the pattern of humidity inferred from the pollen spectrum, showing the highest values around 4.46 Ma, thus supporting the hydrological interpretation of the pollen record.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    XRF core scanning, magnetic susceptibility and density data from the central Japan Trench (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: The data set compiles gamma-ray wet bulk density, magnetic susceptibility (MS), and XRF core scans of the three cores GeoB16433-1 (38° 07.843'N, 144° 00.135'E, 7,525 m water depth), GeoB16431-1 (38° 00.177'N, 143° 59.981'E, 7,542 m water depth), and GeoB16444-1 (37° 42.017'N, 143° 52.377'E, 7,529 m water depth) retrieved from the central Japan Trench during Sonne Cruise SO219A in 2012. Gamma-ray wet bulk density and MS were measured by using the Geotek multi-sensor core logger at MARUM, University of Bremen. XRF core scans (elements: Al, Si, S, K, Ca, Ti, Mn, Fe, Br, Rb, Sr, Zr) were analyzed by using the Avaatech XRF core scanner at MARUM, University of Bremen.
    Keywords: Center for Marine Environmental Sciences; density; magnetic susceptibility; MARUM; XRF CS
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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