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  • PANGAEA  (528)
  • Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung  (2)
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  • 1
    Book
    Book
    Die Expedition ANTARKTIS XVII/2 des Forschungsschiffes POLARSTERN 2000 : = The expedition ANTARKTIS XVII/2 of the research vessel POLARSTERN in 2000 (2002)
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Details Availability
    Keywords: Oceanography Antarctic Ocean ; Antarktis ; Expedition ; Polarstern ; Fahrtbericht ; Antarktisforschung ; Expedition ; Polarstern
    Type of Medium: Book
    Pages: 245 S. , Ill., graph. Darst., Kt.
    Series Statement: Berichte zur Polar- und Meeresforschung 404
    URL: http://www.gbv.de/dms/tib-ub-hannover/342038141.pdf
    DDC: 551.4617
    RVK:
    RY 20075
    Language: German
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  • 2
    Book
    Book
    Snow accumulation on Ekströmisen, Antarctica, 1980 - 1996 : = Untersuchungen zur Schnee-Akkumulation auf dem Ekströmisen, Antarktis, 1980 - 1996 (1999)
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Details Availability
    Keywords: Ekström Ice Shelf ; Schnee ; Akkumulation ; Geschichte ; Ekström Ice Shelf ; Schnee ; Akkumulation ; Geschichte 1980-1996 ; Schneehöhe ; Antarktis
    Type of Medium: Book
    Pages: 137 S. , graph. Darst., Kt.
    Series Statement: Berichte zur Polarforschung 313
    URL: http://www.gbv.de/dms/bs/toc/271157488.pdf
    DDC: 551.57/9989
    RVK:
    RY 20075
    Language: English
    Note: Literaturverz. S. 27 - 29 , Intermediärsprache: Deutsch
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  • 3
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    Ice thickness and bedrock elevation data of Nioghalvfjerdsfjorden Glacier from seismic investigations in 1997/1998 (2018)
    PANGAEA
    In:  Supplement to: Mayer, Christoph; Reeh, Niels; Jung-Rothenhäusler, Frederik; Huybrechts, Philippe; Oerter, Hans (2000): The subglacial cavity and implied dynamics under Nioghalvfjerdsfjorden Glacier, NE-Greenland. Geophysical Research Letters, 27(15), 2289-2292, https://doi.org/10.1029/2000GL011514
    Details
    Publication Date: 2024-07-19
    Description: During an extensive field program, glaciologcal data have been collected at Nioghalvfjerdsfjiorden Glacier (79 North Glacier) in NE-Greenland in 1997 and 1998. A central part of the field work was dedicated to seismic investigations of the floating part of the glacier, determining the ice thickness, the underlying water column depth and the bedrock elevation. The seismic reflexion measurements were carried out with a 24-channel seismograph (Strataview). 600g explosives were used as energy source at a distance of 100 m from the first geophone. Details about the measurements and the project can be found in Mayer et al. (2000).
    Keywords: 79_North_Glacier; MULT; Multiple investigations; NE-Greenland-1997-1998; Nioghalvfjerdsfjorden Glacier; Nioghalvfjerdsfjorden glacier project
    Type: dataset publication series
    Format: application/zip, 2 datasets
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  • 4
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    High-resolution 10Be concentrations in the NGRIP, EDML and Vostok ice cores and high-resolution dD data in Vostok (5G) during the Laschamp excursion (2017)
    PANGAEA
    In:  Supplement to: Raisbeck, Grant M; Cauquoin, Alexandre; Jouzel, Jean; Landais, Amaëlle; Petit, Jean Robert; Lipenkov, Vladimir Ya; Beer, Jürg; Synal, Hans-Arno; Oerter, Hans; Johnsen, Sigfús Jóhann; Steffensen, Jørgen Peder; Svensson, Anders M; Yiou, Françoise (2017): An improved north–south synchronization of ice core records around the 41 kyr 10Be peak. Climate of the Past, 13(3), 217-229, https://doi.org/10.5194/cp-13-217-2017
    Details
    Publication Date: 2024-07-19
    Description: Using new high resolution 10Be measurements in the NGRIP, EDML and Vostok ice cores, together with previously published data from EDC, we present an improved synchronization between Greenland and Antarctic ice cores during the Laschamp geomagnetic excursion ~ 41 ky ago. We estimate the precision of this synchronization to be ± 20 years, an order of magnitude better than our previous work. We discuss the implications of this new synchronization for making improved estimates of the difference between ice and enclosed gas of the same age (delta depth), difference between age of ice and enclosed gas at the same depth (delta age) in the EDC and EDML ice cores, spectral properties of the 10Be profiles and phasing between Dansgaard/Oeschger-10 (in NGRIP) and AIM-10 (in EDML and EDC).
    Type: dataset publication series
    Format: application/zip, 3 datasets
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  • 5
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    Physical and chemical investigations on ice cores from the Filchner-Ronne Ice Shelf (2006)
    PANGAEA
    In:  Supplement to: Graf, Wolfgang; Moser, Heribert; Reinwarth, Oskar; Kipfstuhl, Sepp; Oerter, Hans; Minikin, Andreas; Wagenbach, Dietmar (1994): Snow-accumulation rates and isotopic content (2H, 3H) of near-surface firn from the Filchner-Ronne Ice Shelf, Antarctica. Annals of Glaciology, 20, 121-128, hdl:10013/epic.11645.d001
    Details
    Publication Date: 2024-07-20
    Description: The accumulation and distribution of the 2H content of near-surface layers in the eastern part of the Ronne Ice Shelf were determined from 16 firn cores drilled to about 10 m depth during the Filchner IIIa and IV campaigns in 1990 and 1992, respectively. The cores were dated stratigraphically by seasonal d2H variations in the firn. In addition, 3H and high-resolution chemical profiles were used to assist in dating. Both the accumulation rate and the stable-isotope content decrease with increasing distance from the ice edge: the d2H values range from about -195 per mil at the ice edge to -250 per mil at BAS sites 5 and 6, south of Henry Ice Rise, and the accumulation rates from about 210 to 90 kg/m**2/a. The d2H values of the near-surface firn and the 10 m firn temperatures (Theta) at individual sites are very well correlated: ddelta2H/dTheta=(10.3±0.6)per mil /K; r = 0.97. The d2H profiles of the two ice cores B13 and B15 drilled in 1990 and 1992 to 215 and 320 m depth, respectively, reflect the gradual depletion in 2H in the firn upstream of the drill sites. Comparison with tlie surface data indicates that the ice above 142 m in core B15 and above 137 m in core B13 was deposited on the ice shelf, whereas the deeper ice, down to 152.8 m depth, most probably originated from the margin of the Antarctic ice sheet.
    Keywords: AWI_Glac; B13 BC90; B15 BC92/D236; BER01S90_01; BER02S90_02; Berkner Island (Reinwarthhöhe); Berkner Island (Thyssenhöhe); F131 D131; F136 D136; F230 D230; F231 D231; F235 D235; F236 D236; F246 D246; F330 D330; F335 D335 Flugdepot2; F336 D336; FBC90 BC90; FHWF HWF; Filchner Ronne Ice Shelf; Filchner-Ronne-Ice-Shelf-Project; FIRN; Firn auger; FRI02C92_246; FRI09C90_13; FRI09C90_90; FRI10C90_136; FRI10S90_136; FRI11C90_235; FRI11S90_235; FRI12C90_236; FRI12C92_15; FRI12S90_236; FRI13C90_335; FRI13S90_335; FRI14C90_336; FRI15C90_131; FRI15S90_131; FRI16C90_230; FRI16S90_230; FRI17C90_231; FRI17S90_231; FRI18C90_330; FRI18S90_330; FRI19C90_05; FRI20C90_06; FRI21C90_HWF; FRISP 1992; FS5 BAS_site5; FS6 BAS_site6; Glaciology @ AWI; ICEDRILL; Ice drill; Sampling/drilling ice; SNOWPIT; Snow pit; SS131 D131; SS136 D136; SS230 D230; SS231 D231; SS235 D235; SS236 D236; SS330 D330; SS335 D335; SSBerkN North-dome; SSBerkS South-dome
    Type: dataset publication series
    Format: application/zip, 50 datasets
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  • 6
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    Density, δ¹⁸O and accumulation rates from snow pits on the Filchner-Ronne Ice Shelf (1988)
    PANGAEA
    In:  Supplement to: Graf, Wolfgang; Moser, Heribert; Oerter, Hans; Reinwarth, Oskar; Stichler, Willibald (1988): Accumulation and ice core-studies on Filchner-Ronne Ice Shelf, Antarctica. Annals of Glaciology, 11, 23-31, hdl:10013/epic.25953.d001
    Details
    Publication Date: 2024-07-19
    Description: Accumulation rates in the eastern part of Ronne Ice Shelf were determined by isotopic stratigraphy (18O). The samples were taken from snow-pits dug during the Filchner I and II operations in 1984 and 1986. In general, the accumulation rate decreases towards the south; the greatest decrease, from 21.3 to 13.3 g/cm**2/a, was observed between Filchner Station and measuring point 341, sited 270 km up-stream of the ice edge. The d18O values of the near-surface layers vary between -25 and -29 per mil. The 18O content in the more southerly part is progressively depleted in the direction of Möllereisstrom, paralleling a decrease in the accumulation rate. Near the ice edge the 18O content decreases to the west. A 100 m ice core drilled in 1984 at point 340, 22 km from the ice edge, probably goes back to A.D. 1460; it has been dated by isotopic stratigraphy. The accumulation rate up-stream of the drilling site was deduced from the sequence of annual layers, using a simple ice-flow model. The accumulation shows strong variations over the last 200 years, which may be caused in part by local variations in the accumulation on Ronne Ice shelf.
    Keywords: AWI_Glac; B08/T340 D340; Filchner Ronne Ice Shelf; Filchner-Ronne-Ice-Shelf-Project; FRI01S84_141; FRI03S86_345; FRI04S84_140; FRI05S84_240; FRI05S86_240; FRI0686S_241; FRI06S84_241; FRI07C84_340; FRI07S84_340; FRI07S86_340; FRI08S84_341; FRI08S86_341; FRI13S86_335; FRI15S86_131; FRI16S86_230; FRI17S86_231; FRI18S86_330; FRISP 1992; Glaciology @ AWI; ICEDRILL; Ice drill; Sampling/drilling ice; SNOWPIT; Snow pit; SS131_86 D131; SS140_84 D140; SS141_84 D141; SS230_86 D230; SS231_86 D231; SS240_84 D240; SS240_86 D240; SS241_84 D241; SS241_86 D241; SS330_86 D330; SS335_86 D335; SS340_84 D340; SS340_86 D340; SS341_84 D341; SS341_86 D341; SS345_86 D345
    Type: dataset publication series
    Format: application/zip, 34 datasets
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  • 7
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    First results from stable-istope measurements on ice cores from Dronning Maud Land (2004)
    PANGAEA
    In:  Supplement to: Oerter, Hans; Graf, Wolfgang; Meyer, Hanno; Wilhelms, Frank (2004): The EPICA ice core from Dronning Maud Land: first results from stable-istope measurements. Annals of Glaciology, 39, 307-312, https://doi.org/10.3189/172756404781814032
    Details
    Publication Date: 2024-07-19
    Description: The European Project for Ice Coring in Antarctica (EPICA) focuses on the drilling of two deep ice cores, the first at Dome C and the second at Kohnen station (75°00' S, 0°04' E) in Dronning Maud Land (DML). This paper deals with stable-isotope records from ice cores drilled in DML. In the first season, the deep EPICA DML core reached a depth of 450 m, recovering ice approximately 7000 years old. Generally, the d18O record indicates a stable Holocene climate and shows low variability. However, during the last 4000 years (based on a preliminary time-scale) the d18O values decrease continuously by about 0.6%, and the deuterium excess values increase by about 0.5%. The correlation between d18O and the deuterium excess d is investigated for a 50m long core section and the near-surface snow. High-pass filtered profiles are positively correlated, whereas the correlation between low-pass filtered profiles is negative. A post-depositional effect due to diffusion processes can be seen in a sub-annually resolved profile from snow-pit samples. Changes in the seasonality of the evolution of the snow cover and the consequences for stable-isotope content are demonstrated with data from ice core B31.
    Keywords: B31; DML07C98_31; DML25S02_03; Dronning Maud Land, Antarctica; EDML; EDRILL; EPICA; EPICA_DML3; EPICA_DML7; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; ICEDRILL; Ice drill; Kohnen Station; Neumayer Station (WMO89002); Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SNOWPIT; Snow pit; SPP1158; SS0203
    Type: dataset publication series
    Format: application/zip, 6 datasets
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  • 8
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    1000 year ice-core records from Berkner Island, Antarctica (2002)
    PANGAEA
    In:  Supplement to: Mulvaney, Robert; Oerter, Hans; Peel, David A; Graf, Wolfgang; Arrowsmith, Carol; Pasteur, Elizabeth C; Knight, Bruce; Littot, Geneviève C; Miners, William D (2002): 1000-year ice core records from Berkner Island, Antarctic. Annals of Glaciology, 35, 45-51, https://doi.org/10.3189/172756402781817176
    Details
    Publication Date: 2024-07-19
    Description: Two medium-depth ice cores were retrieved from Berkner Island by a joint project between the Alfred-Wegener-Institut and the British Antarctic Survey in the 1994/95 field season. A 151m deep core from the northern dome (Reinwarthhöhe) of Berkner Island spans 700 years, while a 181m deep core from the southern dome (Thyssenhöhe) spans approximately 1200 years. Both cores display clear seasonal cycles in electrical conductivity measurements, allowing dating by annual-layer counting and the calculation of accumulation profiles. Stable-isotope measurements (both d18O and dD), together with the accumulation data, allow us to estimate changes in climate for most of the past millennium: the data show multi-decadal variability around a generally stable long-term mean. In addition, a full suite of major chemistry measurements is available to define the history of aerosol deposition at these sites: again, there is little evidence that the chemistry of the sites has changed over the past six centuries. Finally, we suggest that the southern dome, with an ice thickness of 950 m, is an ideal site from which to gain a climate history of the late stages of the last glacial and the deglaciation for comparison with the records from the deep Antarctic ice cores, and with other intermediate-depth cores such asTaylor Dome and Siple Dome.
    Keywords: AWI_Glac; B25; BER11C95_25; Glaciology @ AWI; ICEDRILL; Ice drill
    Type: dataset publication series
    Format: application/zip, 4 datasets
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  • 9
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    Physical properties of firn cores from the 1995/96 and 1996/97 field seasons (1999)
    PANGAEA
    In:  Supplement to: Oerter, Hans; Graf, Wolfgang; Wilhelms, Frank; Minikin, Andreas; Miller, Heinz (1999): Accumulation studies on Amundsenisen, Dronning Maud Land, by means of tritium, DEP and stable isotope measurements: first results from the 1995/96 and 1996/97 field seasons. Annals of Glaciology, 29, 1-9, https://doi.org/10.3189/172756499781820914
    Details
    Publication Date: 2024-07-19
    Description: The paper focuses on studies of snow-pit samples and shallow firn cores taken during the 1995-96 and 1996-97 field seasons at Amundsenisen, Dronning Maud Land, Antarctica. The dating of the firn is based on the artificial tritium distribution in the snow cover and on several reference horizons identified by electrical measurements. The early 1964 through 1965 horizon is marked by the deposition of sulfate released to the atmosphere during the eruption of the Agung volcano in March 1963; this horizon was detected by dielectric profiling and electrical conductivity measurements; the proof by chemical analysis has still to be seen. At the ten investigated sites on Amundsenisen the 1964-65 horizon was identified 4.1-5.7 m below the surface. The accumulation rates on Amundsenisen are 41-91 kg/m**2/a. The cores are up to 100 years old. A relationship between isotope content and the mean air temperature on a regional scale can be based on measurements of firn temperature at 10 m depth at the drilling sites. Between Neumayer station at the coast and Heimefrontfjella, the temperature gradient of the deuterium content is 9.6 per mil/K. South of Heimefrontfjella, on the Amundsenisen plateau, it is only 5.5 per mil/K. Time series of yearly accumulation rates show no significant trend. For the isotope records a significant trend to higher values with gradients of 0.1-0.2 d2H per mil/a can be seen in five of the ten time series.
    Keywords: DML01C97_00; DML03C97_00; DML04C97_00; DML05C97_00; DML06C97_00; DML07C97_00; DML08C97_00; DML09C97_00; DML10C97_00; Dronning Maud Land, Antarctica; EPICA; EPICA_DML2; European Project for Ice Coring in Antarctica; FB97DML01; FB97DML03; FB97DML04; FB97DML05; FB97DML06; FB97DML07; FB97DML08; FB97DML09; FB97DML10; FIRN; Firn auger; Neumayer Station (WMO89002)
    Type: dataset publication series
    Format: application/zip, 9 datasets
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  • 10
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    Stable-isotope records from Dronning Maud Land, Antarctica (2002)
    PANGAEA
    In:  Supplement to: Graf, Wolfgang; Oerter, Hans; Reinwarth, Oskar; Stichler, Willibald; Wilhelms, Frank; Miller, Heinz; Mulvaney, Robert (2002): Stable-isotope records from Dronning Maud Land, Antarctica. Annals of Glaciology, 35, 195-201, https://doi.org/10.3189/172756402781816492
    Details
    Publication Date: 2024-07-19
    Description: The European Project for Ice Coring in Antarctica (EPICA) includes a comprehensive pre-site survey on the inland ice plateau of Dronning Maud Land. This paper focuses on the investigation of the 18O content of shallow firn and ice cores. These cores were dated by profiles derived from dielectric-profiling and continuous flow analysis measurements. The individual records were stacked in order to obtain composite chronologies of 18O contents and accumulation rates with enhanced signal-to-noise variance ratios.These chronologies document variations in the last 200 and 1000 years.The 18O contents and accumulation rates decreased in the 19th century and increased during the 20th century.Using the empirical relationships between stable isotopes, accumulation rates and the 10m firn temperature, the variation of both parameters can be explained by the same temperature history.But other causes for these variations, such as the build-up of the snow cover, cannot be excluded. A marked feature of the 1000 year chronology occurs during the period AD 1180-1530 when the 18O contents remains below the long-term mean. Cross-correlation analyses between five cores from the Weddell Sea region and Dronning Maud Land show that 18O records can in some periods be positively correlated and in others negatively correlated, indicating a complex climatic history in time and space.
    Keywords: B31; B32; B33; DML01C96_00; DML02C96_00; DML02S98_13; DML03C97_00; DML03C98_09; DML04C97_00; DML05C97_00; DML05C98_07; DML05C98_32; DML06C97_00; DML07C97_00; DML07C98_31; DML08C97_00; DML09S97_13; DML10C97_00; DML11C98_03; DML12C98_17; DML13C98_16; DML14C98_15; DML15C98_14; DML16C98_13; DML17C98_33; DML18C98_04; DML19C98_05; DML19S98_04; DML20C98_08; DML21C98_10; DML22C98_11; DML23C98_12; DML25C00_01; DML26C00_03; DML27C00_04; Dronning Maud Land, Antarctica; EPICA; EPICA_DML1; EPICA_DML2; EPICA_DML3; EPICA_DML5; European Project for Ice Coring in Antarctica; FB9506; FB96DML01; FB96DML02; FB97DML03; FB97DML04; FB97DML05; FB97DML06; FB97DML07; FB97DML08; FB97DML10; FB9803; FB9804; FB9805; FB9807; FB9808; FB9809; FB9810; FB9811; FB9812; FB9813; FB9814; FB9815; FB9816; FB9817; FB9901; FB9903; FB9904; FIRN; Firn auger; ICEDRILL; Ice drill; Kohnen Station; Neumayer Station (WMO89002); NM03C95_06; SNOWPIT; Snow pit; SS9713; SS9804; SS9813
    Type: dataset publication series
    Format: application/zip, 41 datasets
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