GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • PANGAEA  (36)
  • American Geophysical Union  (2)
  • ELSEVIER SCIENCE BV  (1)
  • Nature Publishing Group
  • 2010-2014  (39)
  • 2012  (18)
  • 2010  (21)
Document type
Keywords
Publisher
Years
  • 2010-2014  (39)
Year
  • 1
    facet.materialart.
    Unknown
    Long chain 1,13- and 1,15-diols as a potential proxy for palaeotemperature reconstruction (2012)
    ELSEVIER SCIENCE BV
    In:  EPIC3Geochimica et Cosmochimica Acta, ELSEVIER SCIENCE BV, 84, pp. 204-216, ISSN: 00167037
    Details
    Publication Date: 2019-07-17
    Description: Although commonly reported in marine and freshwater environments, little is known about the biological sources of long chain alkyl 1,13- and 1,15-diols, and factors controlling their distributions. Here we analyzed the occurrence and distribution of these lipids in a comprehensive set of marine surface sediments and compare their distributions with environmental conditions like sea surface temperature (SST), salinity and nutrient concentrations. Fractional abundances of the C28 1,13-, C30 1,13- and C30 1,15-diols show a strong correlation with SST and based on these results, we propose the Long chain Diol Index (LDI), which expresses the C30 1,15-diol abundance relative to those of C28 1,13-, C30 1,13- and C30 1,15-diols. The LDI shows a strong linear correlation with SST (LDI = 0.033 � SST + 0.095; R2 = 0.969, n = 162) over a temperature range of �3 to 27 �C. Long chain diol distributions in sediments from the South Atlantic close to the Congo River outflow (West Africa) provided a 43 kyr LDI SST record. This record reflects several known climatic events and shows similarities with an alkenone- derived SST record obtained using the same suite of sediments, both in trend and in terms of absolute SST. This confirms the potential of the LDI as a proxy for palaeo-SST reconstruction.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition (2010)
    American Geophysical Union
    Details
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 19 (2004): PA4029, doi:10.1029/2003PA000892.
    Description: We compare a new mid-Pleistocene sea surface temperature (SST) record from the eastern tropical Atlantic to changes in continental ice volume, orbital insolation, Atlantic deepwater ventilation, and Southern Ocean front positions to resolve forcing mechanisms of tropical Atlantic SST during the mid-Pleistocene transition (MPT). At the onset of the MPT, a strong tropical cooling occurred. The change from a obliquity- to a eccentricity-dominated cyclicity in the tropical SST took place at about 650 kyr BP. In orbital cycles, tropical SST changes significantly preceded continental ice-volume changes but were in phase with movements of Southern Ocean fronts. After the onset of large-amplitude 100-kyr variations, additional late glacial warming in the eastern tropical Atlantic was caused by enhanced return flow of warm waters from the western Atlantic driven by strong trade winds. Pronounced 80-kyr variations in tropical SST occurred during the MPT, in phase with and likely directly forced by transitional continental ice-volume variations. During the MPT, a prominent anomalous long-term tropical warming occurred, likely generated by extremely northward displaced Southern Ocean fronts. While the overall pattern of global climate variability during the MPT was determined by changes in mean state and frequency of continental ice volume variations, tropical Atlantic SST variations were primarily driven by early changes in Subantarctic sea-ice extent and coupled Southern Ocean frontal positions.
    Description: The Dutch scientific funding organization (NWO) is thanked for financial support (project 75019617).
    Keywords: Sea surface temperatures ; Mid-Pleistocene transition ; Tropical Atlantic
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Correction to “Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition” (2010)
    American Geophysical Union
    Details
    Publication Date: 2022-05-26
    Description: Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 20 (2005): PA1019, doi:10.1029/2005PA001134.
    Keywords: Sea-surface temperatures ; Mid-Pleistocene transition ; Tropical Atlantic
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    (Supplementary Table B) Data for locations employed as representatives of potential catchment areas (2012)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Aridity index; Calculated; Center for Marine Environmental Sciences; Distance; Evapotranspiration, potential; LATITUDE; LONGITUDE; MARUM; Precipitation, annual mean; Temperature, annual mean
    Type: Dataset
    Format: text/tab-separated-values, 390 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 5
    facet.materialart.
    Unknown
    (Supplementary Table A ) Locations employed for calculation of continental environmental conditions with WebWIMP Modelling program and values obtained as displayed in Fig. 1 (2012)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Aridity index; Center for Marine Environmental Sciences; Evapotranspiration, potential; LATITUDE; LONGITUDE; MARUM; Precipitation, annual mean; Temperature, annual mean
    Type: Dataset
    Format: text/tab-separated-values, 304 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    n-Alkane analyses from an transect of marine surface sediments off southwest Africa (2012)
    PANGAEA
    In:  Supplement to: Vogts, Angela; Schefuß, Enno; Badewien, Tanja; Rullkötter, Jürgen (2012): n-Alkane parameters from a deep sea sediment transect off Southwest Africa reflect continental vegetation and climate conditions. Organic Geochemistry, 47, 109-119, https://doi.org/10.1016/j.orggeochem.2012.03.011
    Details
    Publication Date: 2023-03-03
    Description: An isobathic transect of marine surface sediments from 1°N to 28°S off southwest Africa was used to further evaluate the potential of the chain length distribution and carbon stable isotope composition of higher plant n-alkanes as proxies for continental vegetation and climate conditions. We found a strong increase in the n-C29-33 weighted mean average d13C values from -33 per mil near the equator to around -26 per mil further south. Additionally, C25-35n-alkanes reveal a southward trend of increasing average chain length from 30.0 to 30.5. The data reflect the changing contribution of plants employing different photosynthetic pathways (C3 and C4) and/or being differently influenced by the environmental conditions of their habitat. The C4 plant proportions calculated from the data (ca. 20% for rivers draining the rainforest, to ca. 70% at higher latitude) correspond to the C4 plant abundance in continental catchment areas postulated by considering prevailing wind systems and river outflows. Furthermore, the C4 plant contribution to the sediments correlates with the mean annual precipitation and aridity at selected continental locations in the postulated catchment areas, suggesting that the C4 plant fraction in marine sediments can be used to assess these environmental parameters.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 7 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 7
    facet.materialart.
    Unknown
    Long chain 1,13- and 1,15-diols in surface sediments ans SST reconstruction for sediment core GeoB6518-1 (2012)
    PANGAEA
    In:  Supplement to: Rampen, Sebastiaan W; Willmott, Verónica; Kim, Jung-Hyun; Uliana, Eleonora; Mollenhauer, Gesine; Schefuß, Enno; Sinninghe Damsté, Jaap S; Schouten, Stefan (2012): Long chain 1,13- and 1,15-diols as a potential proxy for palaeotemperature reconstruction. Geochimica et Cosmochimica Acta, 84, 204-216, https://doi.org/10.1016/j.gca.2012.01.024
    Details
    Publication Date: 2023-12-12
    Description: Although commonly reported in marine and freshwater environments, little is known about the biological sources of long chain alkyl 1,13- and 1,15-diols, and factors controlling their distributions. Here we analyzed the occurrence and distribution of these lipids in a comprehensive set of marine surface sediments and compare their distributions with environmental conditions like sea surface temperature (SST), salinity and nutrient concentrations. Fractional abundances of the C28 1,13-, C30 1,13- and C30 1,15-diols show a strong correlation with SST and based on these results, we propose the Long chain Diol Index (LDI), which expresses the C30 1,15-diol abundance relative to those of C28 1,13-, C30 1,13- and C30 1,15-diols. The LDI shows a strong linear correlation with SST (LDI = 0.033 × SST + 0.095; R2 = 0.969, n = 162) over a temperature range of -3 to 27 °C. Long chain diol distributions in sediments from the South Atlantic close to the Congo River outflow (West Africa) provided a 43 kyr LDI SST record. This record reflects several known climatic events and shows similarities with an alkenone-derived SST record obtained using the same suite of sediments, both in trend and in terms of absolute SST. This confirms the potential of the LDI as a proxy for palaeo-SST reconstruction.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 8
    facet.materialart.
    Unknown
    Radiocarbon dating and alkenone-based proxies of sediment core GeoB7702-3 (2010)
    PANGAEA
    In:  Supplement to: Castañeda, Isla S; Schefuß, Enno; Pätzold, Jürgen; Sinninghe Damsté, Jaap S; Weldeab, Syee; Schouten, Stefan (2010): Millennial-scale sea surface temperature changes in the eastern Mediterranean (Nile River Delta region) over the last 27,000 years. Paleoceanography, 25, PA1208, https://doi.org/10.1029/2009PA001740
    Details
    Publication Date: 2024-02-02
    Description: In this study we utilize two organic geochemical proxies, the Uk'37 index and TEX86, to examine past sea surface temperatures (SST) from a site located near the Nile River Delta in the eastern Mediterranean (EM) Sea. The Uk'37 and TEX86 records generally are in agreement and indicate SST ranges of 14°C-26°C and 14°C-28°C, respectively, during the last 27 cal ka. During the Holocene, TEX86-based SST estimates are usually higher than Uk'37-based SST estimates, which is likely due to seasonal differences between the timing of the haptophyte and crenarchaeota blooms in the EM and is related to the onset of the modern flow regime of the Nile River. Both records show that SST varied on centennial to millennial timescales in response to global climate events, i.e., cooling during the Last Glacial Maximum (LGM), Heinrich event 1 (H1), and the Younger Dryas (YD) and warming during the Bølling-Allerød and in the early Holocene during deposition of sapropel S1. The H1 cooling was particularly severe and is marked by a drop in SST of ~4.5°C in comparison to pre-H1 SST, with temperatures 〉1°C cooler than during the LGM. In contrast to high-latitude and western Mediterranean records, which indicate both an abrupt onset and termination of the YD event, the transition from the YD to the Holocene was much more gradual in the EM.
    Keywords: 77; Center for Marine Environmental Sciences; Eastern Mediterranean, Continental slope off Israel; GeoB7702-3; Gravity corer (Kiel type); M52/2; MARUM; Meteor (1986); SL
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 9
    facet.materialart.
    Unknown
    Isoprenoidal GDGT and alkenone-based proxies of sediment core GeoB7702-3 (2010)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 77; AGE; Alkenone, unsaturation index UK'37; Branched and isoprenoid tetraether index; Calculated; Calculated, see reference(s); Calculated from TEX86 (Kim et al., 2008); Calculated from UK37 (Conte et al., 2006); Center for Marine Environmental Sciences; DEPTH, sediment/rock; Eastern Mediterranean, Continental slope off Israel; GeoB7702-3; Gravity corer (Kiel type); M52/2; MARUM; Meteor (1986); Sea surface temperature, annual mean; SL; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 445 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 10
    facet.materialart.
    Unknown
    (Table 1) Radiocarbon dating of sediment core GeoB7702-3 (2010)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 77; Age, 14C AMS; Age, comment; Age, dated; Age, dated material; Age, error; Age, maximum/old; Age, minimum/young; Calendar age; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Eastern Mediterranean, Continental slope off Israel; GeoB7702-3; Gravity corer (Kiel type); M52/2; MARUM; Meteor (1986); Sample code/label; SL
    Type: Dataset
    Format: text/tab-separated-values, 103 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...