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  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven | Supplement to: Hattermann, Tore (2018): Antarctic Thermocline Dynamics along a Narrow Shelf with Easterly Winds. Journal of Physical Oceanography, 48(10), 2419-2443, https://doi.org/10.1175/JPO-D-18-0064.1
    Publication Date: 2023-03-16
    Description: Hydrographic sections across the Antarctic Slope Front at Kapp Norvegia, at about 71S 17W. Gridded monthly mean climatologies were constructed by mapping and avereaging along isobaths of available ship-based and seal (meop.net) CTD data from 1977 to 2016 between 10W and 25W. See Hattermann (2018), Antarctic thermocline dynamics along a narrow shelf with easterly winds, JPO, for further details.
    Keywords: Filchner Ice Shelf Project; FISP; KappNorvegia; Kapp Norvegia; MULT; Multiple investigations
    Type: Dataset
    Format: application/zip, 748.6 kBytes
    Location Call Number Expected Availability
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  • 2
    Publication Date: 2023-03-16
    Description: Support Force Glacier (SFG) is a large ice stream feeding into the Filchner Ice Shelf. The active seismic survey is recorded at the sheet-shelf transition of SFG. We map the bed while grounded, the ocean cavity around a surface channel at the ice shelf and its counterpart at the base, the basal channel, and the seabed. The survey consists of 5 seismic reflection profiles, 2 along-flow profiles and 3 across-flow profiles. The 2.42GB seismic data were recorded with a 300 m long streamer consisting of 96 30Hz p-wave sensors. The sample rate is 0.5 ms, record length 3000 ms. The data is single fold, shot spacing is 150 m: line name: profile TC paper: direction: #shots: - 20170501 profile I along-flow 291 shots - 20170502 profile III across-flow 28 shots - 20170503 profile II along-flow 71 shots - 20170504 profile IV across-flow 40 shots - 20170506 profile V across-flow 50 shots Presented are for each line (20170501 used as example): - The raw shots: 20170501_RAW_SHOTS_EDITS_GEOM.segy - The Kirchhoff migrated and depth converted profiles: 20170501stat_TXmig_Zconv.segy - The shot x,y,z coordinates in longitude, latitude and surface height in meters above sea level (z, WGS84 ellipsoid): 20170501_GPS.txt
    Keywords: 300 m snow streamer with 96 gimballed 30 Hz vertical compressional wave (P-wave) sensors; ANT-Land_2016/17_FISP; AWI Antarctic Land Expedition; Binary Object; Binary Object (File Size); Event label; Filchner Ice Shelf Project; File content; FISP; FISP_2016-2017_20170501; FISP_2016-2017_20170502; FISP_2016-2017_20170503; FISP_2016-2017_20170504; FISP_2016-2017_20170506; Ice-shelf Channels; profile I; profile II; profile III; profile IV; profile V; Snow streamer; SSTREAM
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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  • 3
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    PANGAEA
    In:  Supplement to: Schaffer, Janin; Kanzow, Torsten; von Appen, Wilken-Jon; von Albedyll, Luisa; Arndt, Jan Erik; Roberts, David H (2020): Bathymetry constrains ocean heat supply to Greenland's largest glacier tongue. Nature Geoscience, 13(3), 227-231, https://doi.org/10.1038/s41561-019-0529-x
    Publication Date: 2023-11-24
    Description: As an update to the RTopo-2.0.1 data set (https://doi.org/10.1594/PANGAEA.856844), RTopo-2.0.4 contains new original bathymetry data for the Northeast Greenland continental shelf. In the Southern Ocean, we added the Rosier et al. (JGR Oceans, 2018) bathymetry grid below Filchner Ice Shelf. This work was supported in part through the Deutsche Forschungsgemeinschaft (DFG) within the Special Priority Program (SPP) 1889 "Regional Sea Level Change and Society" (grant OGreen79), the German Federal Ministry for Education and Research (BMBF) within the GROCE project (Grant 03F0778A), the Natural Environment Research Council (NERC) large grant "Ice shelves in a warming world: Filchner Ice Shelf System" (NE/L013770/1), the NERC project "Greenland in a warmer climate: What controls the advance & retreat of the NE Greenland Ice Stream" (Grant NE/N011228/1), and the Helmholtz Climate Initiative "Regional Climate Change" (REKLIM).
    Keywords: AWI_PhyOce; File format; File name; File size; Greenland - Ice Sheet/Ocean Interaction: From process understanding to an analysis of the regional system; Greenland in a warmer climate: What controls the advance & retreat of the NE Greenland Ice Stream; GROCE; Helmholtz-Verbund Regionale Klimaänderungen = Helmholtz Climate Initiative (Regional Climate Change); Ice shelves in a warming world: Filchner Ice Shelf System; NERC_FISS; NERC_Greenland; Physical Oceanography @ AWI; Priority Programme 1889 Regional Sea Level Change and Society; REKLIM; RTopo; RTopo-2; SPP1889; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 56 data points
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  • 4
    Publication Date: 2024-01-30
    Description: Ice shelves play a crucial role in helping controlling the current rate of mass loss from the Antarctic ice sheet through their buttressing potential. This control is modulated by variations in ice shelf mass balance, which cause changes in the thickness of the ice shelf, and therefore in its ability to restrain flow from the grounded ice sheet. We present results showing temporal variability in sub-shelf melting using autonomous phase-sensitive radio-echo sounders (ApRES) near the grounding line of the Roi Baudouin Ice Shelf, Dronning Maud Land, East Antarctica. When combined with additional oceanographic evidence of seasonal variation in stratification and the amplification of the diurnal tides around the Gunnerus Bank, the results suggest an intricate mechanism in which topographic waves control the seasonal melt rate variability near the grounding line of the Roi Baudouin Ice Shelf.
    Keywords: 1 year time series; Antarctica; ApRES; basal ice shelf melt rates; ice-ocean interaction; MULT; Multiple investigations; RoiBaudoin_IceShelf
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
    Publication Date: 2024-01-30
    Description: CTD profiles of the water column beneath Ekstroem Ice Shelf and the adjacent Atka Bay. Ice shelf profiles were made through hot-water drilled access holes in the ice sheld and the profile in Atka Bay was taken through a sea-ice lead. All data were collected in the 2018/2019 Antarctic season, as part of the AWI-BGR Sub-EIS-Obs project, in order to investigate oceanographic properties of the water masses beneath and adjacent to the ice shelf.
    Keywords: ANT-Land_2018_Sub-EIS-Obs; AtkaBay-ab_20190108_1; AtkaBay-ab_20190108_2; AtkaBay-ab_20190108_3; AtkaBay-ab_20190108_4; Calculated; Conductivity; CTD; CTD, RBR, RBRConcerto C.T.D.; Date/Time of event; DEPTH, water; EIS-4b_20181204_0519_cut_1; EIS-4b_20181204_0519_cut_2; EIS-4i_20181204_1555_1; EIS-4i_20181204_1555_2; EIS-5b_20181209_1645_1; EIS-5b_20181209_1645_2; EIS-6_20181225_1; EIS-6_20181225_10; EIS-6_20181225_2; EIS-6_20181225_6; EIS-6_20181225_8; EIS-6_20181225_9; EIS7_20181228_1; EIS7_20181228_10; EIS7_20181228_2; EIS7_20181228_3; EIS7_20181228_4; EIS7_20181228_5; EIS7_20181228_6; EIS7_20181228_7; EIS7_20181228_8; EIS-8g_20190104_1441_1; EIS-8g_20190104_1441_2; Ekström; Elevation of event; Event label; Height above sea level; hot-water drilling; Ice shelf; Ice thickness; Latitude of event; Longitude of event; NEUMAYER III; oceanography; Pressure, water; RBR_CTD; Salinity; Temperature, water; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 91624 data points
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  • 6
    Publication Date: 2024-01-18
    Description: Sub-ice shelf ocean hydrography (temperature, salinity) data were recovered from moorings FSW1 and FSE2 on Filchner Ice Shelf during the FISP-Air airplane campaign in December 2022 - January 2023. Due to different technical failures, both moorings did not transmit their oceanographic data via iridium for several months/years. The sites were visited by plane and missing data were downloaded from a total of 11 SBE37IMP MicroCATs via the inductive modem tether. The downloaded data include the periods 01/2022 – 01/2023 (FSW1), 07/2019 – 10/2019 (FSE2), and 08/2020 – 01/2023 (also FSE2). The moorings were also successfully repaired in the field, and have since resumed sending their data via iridium again. The attached .zip file contains the original logfiles as recorded in the field (.cap files), selected auxiliary information, as well as a cleaned version of these data files. This sub-dataset will be merged with the existing time series since 2016 to yield a fully processed and quality-controlled dataset, which will be published separately. It was also planned to visit moorings FNE1 and FNE2, but these sites could not be reached due to challenging weather conditions. More campaign details are available in the attached field report. This data is part of the joint FISP (AWI) and FISS (BAS) projects.
    Keywords: AWI_PhyOce; Binary Object; Filchner Ice Shelf; Filchner Ice Shelf Project; File content; FISP; FSE2; FSW1; Ice shelves in a warming world: Filchner Ice Shelf System; MOOR; Mooring; NERC_FISS; Physical Oceanography @ AWI
    Type: Dataset
    Format: text/tab-separated-values, 2 data points
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  • 7
    Publication Date: 2024-01-18
    Description: Time series of multi-annual (2015-2019) in-situ measurements of ocean hydrography (temperature, salinity) and ocean current velocities from five hot-water borehole deployed moorings inside the Filchner Ronne Ice Shelf cavity (Southern Weddell Sea, Antartcica), and adjacent ice shelf basal melting radar data (ApRES). Instrument raw data that has been collected as part of the joint FISP (AWI) and FISS (BAS) project has been processed, low pass filtered and interpolated onto a common time axis for synoptic analysis presented in Observed interannual changes beneath Filchner-Ronne Ice Shelf linked to large scale atmospheric circulation by T. Hattermann et al. (accepted).
    Keywords: Filchner Ice Shelf Project; Filchner-Roenne_Ice_Shelf; FISP; Ice shelves in a warming world: Filchner Ice Shelf System; NERC_FISS
    Type: Dataset
    Format: application/zip, 9.6 MBytes
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  • 8
    Publication Date: 2024-01-30
    Description: Ice shelves play a crucial role in helping controlling the current rate of mass loss from the Antarctic ice sheet through their buttressing potential. This control is modulated by variations in ice shelf mass balance, which cause changes in the thickness of the ice shelf, and therefore in its ability to restrain flow from the grounded ice sheet. We present results showing temporal variability in sub-shelf melting using autonomous phase-sensitive radio-echo sounders (ApRES) near the grounding line of the Roi Baudouin Ice Shelf, Dronning Maud Land, East Antarctica. When combined with additional oceanographic evidence of seasonal variation in stratification and the amplification of the diurnal tides around the Gunnerus Bank, the results suggest an intricate mechanism in which topographic waves control the seasonal melt rate variability near the grounding line of the Roi Baudouin Ice Shelf.
    Keywords: 1 year time series; Antarctica; ApRES; Autonomous phase-sensitive radio-echo sounder; basal ice shelf melt rates; Coefficient; Correlation coefficient; DATE/TIME; Depth, relative; Displacement; Displacement, error; Ice draft; ice-ocean interaction; Melt rate; Melt rate, error; MULT; Multiple investigations; Number; Probability; RoiBaudoin_IceShelf; Strain rate, error; Strain rate, vertical; Time in days
    Type: Dataset
    Format: text/tab-separated-values, 136833 data points
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  • 9
    Publication Date: 2024-01-30
    Description: Ice shelves play a crucial role in helping controlling the current rate of mass loss from the Antarctic ice sheet through their buttressing potential. This control is modulated by variations in ice shelf mass balance, which cause changes in the thickness of the ice shelf, and therefore in its ability to restrain flow from the grounded ice sheet. We present results showing temporal variability in sub-shelf melting using autonomous phase-sensitive radio-echo sounders (ApRES) near the grounding line of the Roi Baudouin Ice Shelf, Dronning Maud Land, East Antarctica. When combined with additional oceanographic evidence of seasonal variation in stratification and the amplification of the diurnal tides around the Gunnerus Bank, the results suggest an intricate mechanism in which topographic waves control the seasonal melt rate variability near the grounding line of the Roi Baudouin Ice Shelf.
    Keywords: 1 year time series; Antarctica; ApRES; Autonomous phase-sensitive radio-echo sounder; basal ice shelf melt rates; Coefficient; Correlation coefficient; DATE/TIME; Depth, relative; Displacement; Displacement, error; Ice draft; ice-ocean interaction; Melt rate; Melt rate, error; MULT; Multiple investigations; Number; Probability; RoiBaudoin_IceShelf; Strain rate, error; Strain rate, vertical; Time in days
    Type: Dataset
    Format: text/tab-separated-values, 138584 data points
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  • 10
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    Unknown
    PANGAEA
    In:  Supplement to: Huhn, Oliver; Hattermann, Tore; Davis, Peter E D; Dunker, Erich; Hellmer, Hartmut H; Nicholls, Keith W; Østerhus, Svein; Rhein, Monika; Schröder, Michael; Sültenfuß, Jürgen (2018): Basal Melt and Freezing Rates From First Noble Gas Samples Beneath an Ice Shelf. Geophysical Research Letters, 45(16), 8455-8461, https://doi.org/10.1029/2018GL079706
    Publication Date: 2024-02-16
    Description: A climatically induced acceleration in ocean‐driven melting of Antarctic ice shelves would have consequences for both the discharge of continental ice into the ocean and thus global sea level, and for the formation of Antarctic Bottom Water and the oceanic meridional overturning circulation. Using a novel gas‐tight in situ water sampler, noble gas samples have been collected from six locations beneath the Filchner Ice Shelf, the first such samples from beneath an Antarctic ice shelf. Helium and neon are uniquely suited as tracers of glacial meltwater in the ocean. Basal meltwater fractions range from 3.6% near the ice shelf base to 0.5% near the sea floor, with distinct regional differences. We estimate an average basal melt rate for the Filchner‐Ronne Ice Shelf of 177 ± 95 Gt/year, independently confirming previous results. We calculate that up to 2.7% of the meltwater has been refrozen, and we identify a local source of crustal helium.
    Keywords: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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