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  • 1
    Digitale Medien
    Digitale Medien
    Seasonal variability of particle flux in the Weddell Sea and its relation to ice cover (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 426-428 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The year-round mooring station WS-1 is located at 62°26.5' S, 34°45.5' W, in a water depth of 3,880 m. This station is covered by sea ice for about 70% of the year (〉9 on ice-cover scale (ICS); see refs 1 and 2). We developed an automated Parflux Mk 5-25 time-series sediment trap3 at 863 ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/335426a0
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  • 2
    Digitale Medien
    Digitale Medien
    A geophysical survey of the De Gerlache Seamounts: preliminary results (1998)
    Springer
    Geo-marine letters 18 (1998), S. 19-25 
    Details
    ISSN: 1432-1157
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract  The De Gerlache Seamounts actually consist of two medium-sized guyots, with summits at depths of 350–600 m. Acoustic profiler data show no significant sediment on these guyots. Alkaline basalts dredged from the summit of the eastern guyot yield K/Ar ages between 20.1±1.0 and 23.2±1.2 Ma. Basement ridges and sediment-filled troughs between the guyots are associated with the prominent gravity anomaly extending north from the Antarctic margin. This structure possibly played a role in the guyot formation, however, the question of how the De Gerlache Seamounts are related to this gravity anomaly remains uncertain.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003670050047
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  • 3
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    Biological response to millennial variability of dust and nutrient supply in the Subantarctic South Atlantic Ocean (2014)
    Royal Society Publishing
    In:  EPIC3Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society Publishing, 372(2019), pp. 20130054-20130054, ISSN: 1364-503X
    Details
    Publikationsdatum: 2018-08-10
    Beschreibung: Fluxes of lithogenic material and fluxes of three palaeo-productivity proxies (organic carbon, biogenic opal and alkenones) over the past 100 000 years were determined using the 230Th-normalization method in three sediment cores from the Subantarctic South Atlantic Ocean. Features in the lithogenic flux record of each core correspond to similar features in the record of dust deposition in the EPICA Dome C ice core. Biogenic fluxes correlate with lithogenic fluxes in each sediment core. Our preferred interpretation is that South American dust, most probably from Patagonia, constitutes a major source of lithogenic material in Subantarctic South Atlantic sediments, and that past biological productivity in this region responded to variability in the supply of dust, probably due to biologically available iron carried by the dust. Greater nutrient supply as well as greater nutrient utilization (stimulated by dust) contributed to Subantarctic productivity during cold periods, in contrast to the region south of the Antarctic Polar Front (APF), where reduced nutrient supply during cold periods was the principal factor limiting productivity. The anti-phased patterns of productivity on opposite sides of the APF point to shifts in the physical supply of nutrients and to dust as cofactors regulating productivity in the Southern Ocean.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , peerRev
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  • 4
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    Chapter 3.3. Palaeo-oceanography (2014)
    The Scientific Committee on Antarctic Research, Scott Polar Research Institute, Lensfield Road, Cambridge, CB2 1ER, United Kingdom (www.scar.org).
    In:  EPIC3Biogeographic Atlas of the Southern Ocean, Biogeographic Atlas of the Southern Ocean, Cambridge, The Scientific Committee on Antarctic Research, Scott Polar Research Institute, Lensfield Road, Cambridge, CB2 1ER, United Kingdom (www.scar.org)., 498 p., pp. 44-44, ISBN: 978-0-948277-28-3
    Details
    Publikationsdatum: 2014-08-25
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Inbook , peerRev
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  • 5
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    Quaternary surface water temperature estimations: New diatom transfer functions for the Southern Ocean (2014)
    ELSEVIER SCIENCE BV
    In:  EPIC3Palaeogeography Palaeoclimatology Palaeoecology, ELSEVIER SCIENCE BV, 414, pp. 1-19, ISSN: 0031-0182
    Details
    Publikationsdatum: 2014-09-04
    Beschreibung: Here we present an improvement of paleotemperature reconstructions for the Southern Ocean by combining new diatom data from the Pacific sector with published Atlantic and Indian sector reference data. The statistical analysis of 336 surface sediment samples recovered from a wide area of Southern Ocean environments defines a supra-regional reference data set for quantitative summer sea surface temperature (SSST) estimations. In situ temperature measurements covering the time span from approx. 1900 to 1991 were used as reference instead of more recent time series of satellite-derived data, possibly biased by ocean warming. Different transfer function (TF) models for the Imbrie and Kipp Method (IKM), the Modern Analog Technique (MAT), Weighted Averaging (WA), and Weighted Averaging Partial Least Squares (WAPLS) were tested. Best performance for IKM was obtained using the D336 set with 29 diatom taxa and three factors, resulting in root mean square error of prediction (RMSEP) of 0.833°C for SSST. MAT estimates were best with six analogs resulting in the lowest RMSEP of 0.812°C. WAPLS applied to D336 resulted in a RMSEP of 0.782°C. WA performed less well, expressed by a RMSEP of 0.974°C. Furthermore, two subsets for the Atlantic (D151) and the Pacific sectors (D107) were applied with IKM to test for the advantages of localized TFs. IKM-D151 and IKM-D107 performed comparably good as IKM-D336, with RMSEP of 0.71°C and 0.68°C, respectively. Application of the augmented reference data sets on two Pleistocene sediment records from the Atlantic (PS1768-8) and Pacific (PS58/271-1) sectors led to the best performance of IKM with D336, expressed by high overall communalities (〉0.75) and fewer (PS1768-8) to no (PS58/271-1) no-analogs, compared to the regional data sets, proving IKM-D336 to deal better with higher assemblage variability. SSST estimates for both cores exhibit similar glacial/interglacial patterns for all four applied D336-based TF methods, with the best concordance between IKM and WAPLS.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev , info:eu-repo/semantics/article
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  • 6
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    Reconstructing past sea ice (2013)
    In:  EPIC3EOS Transactions, American Geophysical Union, 94(42), pp. 376
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , peerRev
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  • 7
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    Sampling marine sediment (2013)
    In:  EPIC3PAGES News, 21(1), pp. 8-9
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    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , notRev
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  • 8
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    Dating and synchronizing paleoclimate records over the last interglacial (2013)
    In:  EPIC3PAGES News, 21(1), pp. 26-27
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , notRev
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  • 9
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    Reconstruction of past sea ice extent (2013)
    In:  EPIC3PAGES news, 21(1), pp. 30-31
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , notRev
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  • 10
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    1st Sea Ice Proxy (SIP) Working Group workshop, Montreal, Canada 7-9 March 2012 (2013)
    In:  EPIC3PAGES news, 21(1), pp. 43-43
    Details
    Publikationsdatum: 2019-07-17
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , notRev
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