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178 datasets found
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GCM-Forced Ice-Sheet Simulations Validated Against Proxy Reconstructions
Antarctica New ZealandHere, we present new, transient, GCM-forced ice-sheet simulations validated against proxy reconstructions. This is the first time such an evaluation has been attempted. Our empirically constrained simulations indicate that the AIS contributed 4 m to global mean sea level by 126 ka BP, with ice lost primarily from the Amundsen, but not Ross or Weddell Sea,...Created 25 March 2025 • Updated 25 March 2025 -
Metagenomic Analyses of Microbial Communities Beneath the Ross Ice Shelf, 2017
Antarctica New ZealandIn Antarctica, ice shelves such as the Ross Ice Shelf (RIS) fringe 75% of the coastline and cover over 1.5 million km2, creating distinct and largely unexplored marine environments. It is fundamental to characterize the communities under these shelves to understand their biogeochemical role and predict how they might respond to future ice-shelf collapse...Created 25 March 2025 • Updated 25 March 2025 -
Coastal and Landfast Sea Ice Thickness in Western Ross Sea, Antarctica, from...
Antarctica New ZealandThe 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...Created 25 March 2025 • Updated 25 March 2025 -
Model configuration and data used in "The application and modification of...
Antarctica New ZealandThis metadata record represents the code and data used for the first application of WRF-Hydro/Glacier in the McMurdo Dry Valleys (Commonwealth Glacier), which as a fully distributed hydrological model has the capability to resolve the streams from the glaciers to the bare land that surround them. We applied a glacier and hydrology model in the McMurdo Dry...Created 25 March 2025 • Updated 25 March 2025 -
Environmental Datalogger Array, Lake Fryxell, 2023
Antarctica New ZealandThis metadata record represents 12 datalogger arrays from Lake Fryxell. These data were used to investigate how the environment is changing as lake levels rise and the ice thins. It provides the context for evaluating the responses of ecosystems. GET DATA: ian.hawes@waikato.ac.nzCreated 25 March 2025 • Updated 25 March 2025 -
Landfast sea-ice and sub-ice platelet-layer thicknesses in McMurdo Sound...
Antarctica New ZealandGround-based electromagnetic induction (EM) surveys of sea ice and sub-ice platelet layer thicknesses were carried out on land-fast sea ice in McMurdo Sound, Antarctica in November of 2011, 2013, 2016 and 2017. The EM data was acquired using a frequency-domain Geonics Ltd EM31-MK2 instrument mounted on a sledge and towed by skidoo. The thicknesses of...Created 25 March 2025 • Updated 25 March 2025 -
Snow, Sea Ice, and Sub Ice Platelet Layer Measurements of Landfast Sea Ice...
Antarctica New ZealandA semi-autonomous sea ice monitoring station (SIMS) was deployed to record ice temperature profiles and snow depths throughout the winter to late spring portion of the sea ice cover's growth season. These data were used to quantify the factors that govern the rate at which the sea ice grows. These factors include the local air temperature, vertical...Created 25 March 2025 • Updated 25 March 2025 -
Sea Ice and Sub-Ice Platelet Layer Core Data, McMurdo Sound, 2022
Antarctica New ZealandThis metadata record represents multiple analyses carried out on sea ice cores in McMurdo Sound. Analyses include: - Incorporated Biology from Sub-Ice Platlet Layer (SIPL) Cores, McMurdo Sound - DNA, eDNA, and RNA Sequencing of Zooplankton, Phytoplankton, Microbial from Sea Ice Cores, McMurdo Sound - Nitrate, Nitrite, Phosphate, and Silicate Concentration...Created 25 March 2025 • Updated 25 March 2025 -
Ice Thickness and Surface Velocities for 12 Ice Tongues, Western Ross Sea, 2017-2021
Antarctica New ZealandThis metadata record represents ice thickness and surface velocity data for 12 ice tongues in the western Ross Sea, Antarctica. Basal mass change of twelve Antarctic ice tongues were calculated using a flux gate approach, deriving thickness from ICESat-2 height measurements and ice surface velocities from Sentinel-1 feature-tracking over the same period...Created 25 March 2025 • Updated 25 March 2025 -
Vertical Seismic Profile and Utlrasonic Data, Priestley Glacier, 2019-2020
Antarctica New ZealandThis metadata record represents the first direct comparison of seismic and ultrasonic data with measured crystallographic preferred orientations Crystallographic preferred orientations (CPO) in a polar shear margin (Priestly Glacier, Antarctica). Analyses of seismic, ultrasonic and measured CPO datasets were combined to assess the potential of active-...Created 25 March 2025 • Updated 25 March 2025 -
Total Column Ozone Database V3.4
Antarctica New ZealandTotal column ozone (TCO) data from multiple satellite-based instruments have been combined to create a single near-global daily time series of ozone fields at 1.25degree longitude by 1degree latitude spanning the period 31 October 1978 to 31 December 2016. Comparisons against TCO measurements from the ground-based Dobson and Brewer spectrophotometer...Created 25 March 2025 • Updated 25 March 2025 -
Exposure Ages of Glacial Erratics and Bedrock along Byrd Glacier to...
Antarctica New ZealandCosmogenic surface exposure chronologies were used to quantitatively constrain past rates of ice thinning, and the absolute timing of ice discharge and thinning events. We sampled glacial erratics and bedrock from Byrd Glacier (LW1 Nunatak, LW2 Nunatak, Lonewolf Nuntataks, Tiger Nunatak, Mt. Tadpole). Samples were analysed for their exposure history, and...Created 25 March 2025 • Updated 25 March 2025 -
Direct Observations of Melting, Freezing, and Ocean Circulation in an Ice...
Antarctica New ZealandContained in this folder are the raw and processed data files for data collected with the underwater robot Icefin in the ocean cavity beneath Ross Ice Shelf, near the grounding line of Kamb Ice Stream. Most of these data are located within a basal crevasse. They were collected in December 2019 as part of the Aotearoa New Zealand Antarctic Science Platform...Created 25 March 2025 • Updated 25 March 2025 -
Borehole Seismic Data at Windless Blight and Hot Water Drill Site 2 (HWD2),...
Antarctica New ZealandThis metadata record presents observations of ice shelf anisotropy derived from borehole seismic data. Hot-water-drilled boreholes were created at two sites: Windless Bight (WB) near the grounding line on Ross Island and HWD-2 in the central Ross Ice Shelf. The boreholes housed seismometers frozen at various depths within the ice, enabling seismic...Created 25 March 2025 • Updated 25 March 2025 -
Glycerol dialkyl glycerol tetraether (GDGT) abundances, age-depth tie points...
Antarctica New ZealandThis data publication contains biostratigraphic age events for the CIROS-1 drill core, updated age ranges for a suite of samples from the McMurdo erratics sample collection, age-depth tie points for CIROS-1, CRP-2/2A, DSDP 270, DSDP 274, ANDRILL 2A and ANDRILL 1B, and glycerol dialkyl glycerol tetraethers (GDGTs) abundances and indices for samples from...Created 25 March 2025 • Updated 25 March 2025 -
Coastal Mooring Instrument Array: CTD, PAR, and Currents at Granite Harbour...
Antarctica New ZealandThis metadata record represents environmental data from oceanographic moorings at Granite Harbour Middle (-77.00406667, 162.58795000). Conductivity, temperature, depth (CTD), photosynthetically active radiation (PAR), and currents were measured at ~20-meter depth for 12 months to characterise variability in the nearshore habitat. These instruments form...Created 25 March 2025 • Updated 25 March 2025 -
Sediment Core Solid Phase Geochemistry, Microbiology, Ancient DNA, and...
Antarctica New ZealandThis metadata record represents solid phase geochemistry, microbiology, ancient DNA and diatom data collected from core 5072_1_L_1S. GET DATA: r.levy@gns.cri.nzCreated 25 March 2025 • Updated 25 March 2025 -
Micro-Gravity Data, Ross Ice Shelf, 2022 and 2023
Antarctica New ZealandA grid of microgravity readings was collected using a Lacoste and Romberg D-meter. Data were collected coincident with the seismic survey that was acquired contemporaneously with this data set, as well as with two ROSETTA survey lines. Further, a 2 km grid was commenced within the prescribed safe operating polygon to provide 3D coverage. GET DATA:...Created 25 March 2025 • Updated 25 March 2025 -
Paleotemperature Profiles, Southern Victoria Land, 2024
Antarctica New ZealandThis metadata record represents paleotemperature profiles generated from over 400 samples collected across the McMurdo Dry Valleys/Southern Victoria Land region. Samples were analysed for rock magnetism, dispersed organic carbon, and rock geochemistry. Samples at Beacon Heights were also analysed for coal petrology. Samples were collected at: - Upper...Created 25 March 2025 • Updated 25 March 2025 -
Active Seismic Survey Data at Kamb Ice Stream (KIS2), Ross Ice Shelf, 2019
Antarctica New ZealandThis metadata record represents the data from seismic surveys at Kamb Ice Stream 2. Data were used to generate seismic images which were used to improve our knowledge of the types and thicknesses of sedimentary units lying beneath the seafloor. Survey lines were carried out across 2 x 10 km long profiles in the field area GET DATA: andrew.gorman@otago.ac.nzCreated 25 March 2025 • Updated 25 March 2025
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