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  • This metadata record represents the data from 12 passive seismic stations at Kamb Ice Stream (site 1). Seismic stations measure vibrations in the ice providing boundary conditions and revealing controlling processes (ice-substrate interaction). Kamb Ice Stream ceased flowing from the West Antarctic Ice Sheet into the Ross Ice Shelf approximately 150 years. Stagnation of this ice stream has been attributed to changes in the routing of subglacial water. The KambSeis experiment targets a major subglacial drainage channel that crosses the ice-sheet ice-shelf transition and enters the sub ice shelf cavity. Using four small arrays surrounding the surface expression of the subglacial channel we aim to characterise drainage of subglacial water through the channel. GET DATA: http://ds.iris.edu/mda/5K/?timewindow=2019-2020

  • Data provided here have been collected as part of the project "Measurements and Improved Parameterization of the Thermal Conductivity and Heat Flow through First-Year Sea Ice", OPP-0126007* and include measurements of temperature and various ice properties at selected sites in first-year and multiyear sea ice in McMurdo Sound, Antarctica in the years 2002-2004. Data from earlier installations of thermistor chains for measurements of ice temperature carried out by the New Zealand team have also been included. Data files are in Microsoft Excel format, with individual worksheets for specific cores or temperature data sets. Detailed information and comments on data sampling location etc. are provided in the files. Further information on data collection, results etc. can be found in the following publications: Backstrom, L. G. E., and H. Eicken 2007, submitted, Capacitance probe measurements of brine volume and bulk salinity in first-year sea ice, Cold Reg. Sci. Tech. Pringle, D. J., H. Eicken, H. J. Trodahl, and L. G. E. Backstrom 2007, submitted, Thermal conductivity of landfast Antarctic and Arctic sea ice, J. Geophys. Res. Trodahl, H. J., S. O. F. Wilkinson, M. J. McGuinness, and T. G. Haskell 2001, Thermal conductivity of sea ice; dependence on temperature and depth, Geophys. Res. Lett., 28, 1279-1282. Data are in Microsoft Excel format. Abbreviations: AH = Arrival Heights; CH = Camp Haskell (near Delbridge Islands); VUW = Victoria University Wellington; UAF = University Alaska Fairbanks. RELATED PUBLICATION: https://doi.org/10.1017/jog.2022.108 GET DATA: https://drive.google.com/drive/folders/1ooUH9dPvWT66afFC51Cb0JOHg66rn0sy

  • The thicknesses of sea ice and sub-ice platelet layer were measured at regular intervals on fast ice in McMurdo Sound, Antarctica in November and December of 2011. Thirty-metre cross-profiles were established at each site, and snow depths were measured at 0.5 m intervals along the transect lines with a metal ruler. A mean snow depth for each site was derived from these 120 measurements. Freeboard, sea ice thickness and sub-ice platelet layer thickness were recorded at five locations at each site - at the central crossing point and at the end points of each transect. The mean of these was then calculated and taken as representative of the site. Ice thicknesses were measured by using a tape measure with a brass T-anchor attached at the zero mark. This was deployed vertically through the drill-hole and allowed to rotate to a horizontal alignment when exiting the bottom of the drill-hole at the ice-ocean interface. From this position the anchor is slowly pulled upwards until some resistance is met and the first measurement is taken. This resistance is taken to mark the sub-ice platelet layer/ocean interface. The tape measure is then pulled harder, forcing the bar to pass through the sub-ice platelet layer until it sits flush against the sea ice/sub-ice platelet layer interface where a second measurement is taken. Measurement sites were about 5 km apart.

  • This metadata record represents the data from 15 passive seismic stations at Kamb Ice Stream (site 2). Seismic stations measure vibrations in the ice providing boundary conditions and revealing controlling processes (ice-substrate interaction). Seismometers were deployment within 50 km radius of KIS2 borehole (subglacial channel). GET DATA: r.levy@gns.cri.nz

  • This metadata record represents environmental DNA sequence data and metadata barcode file. Seawater and sponge eDNA metabarcoding sampling was conducted at seven coastal locations (Cape Barne, Cape Evans, Cziko Seamount, Granite Harbor Middle, Granite Harbor South, and Turtle Rock) in the Ross Sea to assess spatial eukaryote biodiversity patterns and investigate eDNA signal differences between both substrates. Five replicate 500 mL water samples were collected at each of seven locations within 2 m of the ocean floor using a Niskin bottle. At the same time, five sponge specimens were collected by ROV at a depth range of 18–30 m from three out of the seven locations, thereby enabling sponge and near-bottom water eDNA signal comparison. Further details and laboratory procedures can be found in https://doi.org/10.1002/edn3.500 GET DATA: https://figshare.com/projects/Unveiling_the_Hidden_Diversity_of_Marine_Eukaryotes_in_the_Ross_Sea_A_Comparative_Analysis_of_Seawater_and_Sponge_eDNA_Surveys/186127

  • Full-depth CTD profiles taken on along-sound and cross-sound transects of McMurdo Sound. Eleven stations with six independent sites were visited. Potential temperature (theta) (measured); Units: °C; Observation Type: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: SBE19+ CTD profiler SALINITY (measured); Units: psu; Observation Type: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: SBE19+ CTD profiler PRESSURE - WATER [HYDROSTATIC PRESSURE] (measured); Units: dbar; Observation Type: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: SBE19+ CTD profiler GET DATA: https://data.noaa.gov/onestop/collections/details/293bf93a-9d10-42df-b468-27fc726b2330

  • This metadata record represents the data from seismic surveys at Kamb Ice Stream 1. 30 line kilometers of seimsic and gravity data were collected in front of the Kamb Ice Stream Grounding Line to charactersie the water column beneath the Ross Ice Shelf and the sedimentary strata beneath the sea floor. A 20-km long line was collected ~10km offshore and parallel to the grounding line. A 10-km corossing line was collected perpendicular to the grounding line. 2.4 kg charges were detonated in 25 m deep hot water drillholes at 120m intervals. Returnes were recorded on 96 geophone channels. GET DATA: andrew.gorman@otago.ac.nz

  • This metadata represents ApRES (Autonomous phase-sensitive Radio Echo Sounder) measurements conducted at Kamb Ice Stream 3 (KIS3). . GET DATA: r.levy@gns.cri.nz

  • The data are approximately 800 km of airborne electromagnetic survey of coastal sea ice and sub-ice platelet layer (SIPL) thickness distributions in the western Ross Sea, Antarctica, from McMurdo Sound to Cape Adare. Data were collected between 8 and 13 November 2017, within 30 days of the maximum fast ice extent in this region. Approximately 700 km of the transect was over landfast sea ice that had been mechanically attached to the coast for at least 15 days. Most of the ice was first-year sea ice. Unsmoothed in-phase and quadrature components are presented at all locations. Data have been smoothed with an 100 point median filter, and in-phase and quadrature smoothed data are also presented at all locations. Beneath level ice it is possible to identify the thickness of an SIPL and a filter is described (Langhorne et al) to identify level ice. Level ice in-phase, quadrature and SIPL thickness, derived from these, are presented at locations of level ice. For rough ice, the in-phase component is considered the best measure of sea ice thickness. For level ice where there is the possibility of an SIPL, then the quadrature component is considered the best measure of ice thickness, along with SIPL thickness. All data are in meters.

  • This metadata record represents ApRES (Autonomous phase-sensitive Radio Echo Sounder) and pRES (Phase-sensitive Radio Echo Sounder) measurements conducted at Kamb Ice Stream site 1 (KIS1). GET DATA: r.levy@gns.cri.nz