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    Ocean current speed and direction were recorded at 5-minute intervals at a nominal depth of 100 m in McMurdo Sound at 77.7667 °S, 165.2000 °E by an Aanderaa Seaguard single-point current meter. The dates covered by the ocean current observations are from 3-11-2017 06:35:02 UTC to 20-11-2017 22:55:02 UTC. Current speed is provided in units of cm/s. Current direction is provided in degree relative to true north and is the direction the current is flowing towards.

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    Acoustic volume backscatter measurements were made by an ASL Environmental Sciences Acoustic Zooplankton Fish Profiler (AZFP) operating at four-frequencies (125 kHz, 200 kHz, 455 kHz and 769 kHz). README: https://store.pangaea.de/Publications/Robinson-etal_2020/AZFP2016_README.pdf Further details are provided at: Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. Geophysical Research Letters, 47, e2020GL090498. https://doi.org/10.1029/2020GL090498

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    Acoustic volume backscatter measurements were made by an ASL Environmental Sciences Acoustic Zooplankton Fish Profiler (AZFP) operating at four-frequencies (125 kHz, 200 kHz, 455 kHz and 769 kHz). README: https://store.pangaea.de/Publications/Robinson-etal_2020/AZFP2017_README.pdf Further details are provided at: Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. Geophysical Research Letters, 47, e2020GL090498. https://doi.org/10.1029/2020GL090498

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    Ocean salinity was recorded at 10 second intervals by a Seabird Electronics SBE 37 microCAT CTD at a nominal depth of 100 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the salinity observations at 100 m depth are from 28-10-2016 06:43:11 UTC to 13-11-2016 21:59:51 UTC. The salinity is reported in units of practical salinity. Ocean temperature was recorded at 10 second intervals by a Seabird Electronics SBE 56 thermistor at a nominal depth of 75 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the temperature observations at 75 m depth are from 3-11-2017 08:26:01 UTC to 20-11-2017 23:00:01 UTC. The temperature is reported in units of °C in the ITS-90 temperature scale.

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    The data set contains sea ice thickness (consolidated ice plus snow) of pack ice in the Western Ross Sea acquired by fixed wing aircraft (BT-67 C-GJKB) between McMurdo Sound (77.68 S / 165.52E) and near Cape Adare (72.01 S / 171.53 E). Two survey profiles are oriented South - North near parallel and about 100km off the Victoria Land coast, and two survey profiles are leading into Terra Nova Bay oriented in East –West direction at around 74.5 S and 75 S. The total length of the survey profiles is about 800 km. The Southern survey was flown from 9 November 2017 22:19 UTC to 10 November 2017 00:25 UTC beginning in McMurdo Sound and went for 300 km to the north, before turning west into Terra Nova Bay for another 100 km. The Northern survey was flown on 11 November 2017 from 1:21 UTC to 3:04 UTC from near the Adare Peninsula in a southerly direction for 215 km before turning southwest towards Cape Washington for another 140 km. The airborne electromagnetic induction (AEM) ice thickness sensor was towed by a Basler BT-67 aircraft sampling thickness every 6m along the flight track. The accuracy of the measured ice thickness is +/-0.1m over level ice. Ice thicknesses are biased up to 50% low for pressure ridges smaller than the signal footprint of about 45 m. Data was collected with the support of Antarctica New Zealand (event K066-1718-A; 25/10/2017-28/11/2017) for the New Zealand National Science Challenge Deep South (Targeted observation and process informed modelling of Antarctic sea ice, PI P. Langhorne). The purpose of data collection was to gain a basic understanding of sea ice thickness close to the areas of the Ross Sea, McMurdo, and Terra Nova Bay Polynyas.

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    Temperature and salinity observations were made at nominal depths of 75 m and 100 m, respectively, by Sea Bird Electronics sensors. Acoustic volume backscatter measurements were made by an ASL Environmental Sciences Acoustic Zooplankton Fish Profiler (AZFP) operating at four-frequencies (125 kHz, 200 kHz, 455 kHz and 769 kHz). The AZFP profiled the top 25 m of the water column in 0.1 m bins. All instruments were deployed through a landfast sea ice cover that was approximately 2 m thick. The WWW Tide and Current Predictor model was used to generate tidal height forecasts for the deployment periods. Ocean salinity was recorded at 10 second intervals by a Seabird Electronics SBE 37 microCAT CTD at a nominal depth of 100 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the salinity observations at 100 m depth are from 28-10-2016 06:43:11 UTC to 13-11-2016 21:59:51 UTC. The salinity is reported in units of practical salinity. Ocean temperature was recorded at 10 second intervals by a Seabird Electronics SBE 56 thermistor at a nominal depth of 75 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the temperature observations at 75 m depth are from 28-10-2016 06:43:11 UTC to 13-11-2016 21:59:51 UTC and 3-11-2017 08:26:01 UTC to 20-11-2017 23:00:01 UTC. The temperature is reported in units of °C in the ITS-90 temperature scale. Tidal height forecast data were produced from the WWW Tide and Current Predictor (http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Ross+Island%2C+Antarctica) for Ross Island, Antarctica, for the period of the 2016 AZFP deployments. Related publication: Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. Geophysical Research Letters, 47, e2020GL090498. https://doi.org/10.1029/2020GL090498 GET DATA: https://doi.org/10.1594/PANGAEA.923762

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    Tidal height forecast data were produced from the WWW Tide and Current Predictor (http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Ross+Island%2C+Antarctica) for Ross Island, Antarctica, for the period of the 2017 AZFP deployments. The dates covered by the tidal height forecast are from 8-11-2017 00:00 UTC to 13-11-2017 23:50 UTC.

  • GET DATA: https://doi.org/10.5281/zenodo.3940766 This archive provides the ice sheet model outputs produced as part of the publication "ISMIP6 Antarctica: a multi-model ensemble of the Antarctic ice sheet evolution over the 21st century", published in The Cryosphere, https://tc.copernicus.org/articles/14/3033/2020/ Contact: Helene Seroussi, Helene.seroussi@jpl.nasa.gov Further information on ISMIP6 and ISMIP6 Antarctica Projections can be found here: http://www.climate-cryosphere.org/activities/targeted/ismip6 http://www.climate-cryosphere.org/wiki/index.php?title=ISMIP6-Projections-Antarctica Users should cite the original publication when using all or part of the data. In order to document CMIP6’s scientific impact and enable ongoing support of CMIP, users are also obligated to acknowledge CMIP6, ISMIP6 and the participating modeling groups. About the dataset: - The results are based on model output computed from the ISMIP6 native grids that vary between models. - The results are calculated over the ice-covered area of Antarctica, corrected for map projection errors, ice sheet model specific densities taken into account. - Results for the experiments 'exp*' are provided both as raw results and calculated as differences to the control experiment (ctrl_proj_open or ctrl_proj_std depending on the experiment). The later files are named with "minus_ctrl_proj" to indicate that the control run is substracted. - Results for ctrl_proj_open, ctrl_proj_std, hist_open and hist_std are not corrected to remove the control run. ----------------> Directory structure: groupname1 modelname1 expid computed_iareafl_AIS_groupname1_modelname1_expid.nc computed_iareafl_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_iareagr_AIS_groupname1_modelname1_expid.nc computed_iareagr_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_icearea_AIS_groupname1_modelname1_expid.nc computed_icearea_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_ivol_AIS_groupname1_modelname1_expid.nc computed_ivol_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_ivaf_AIS_groupname1_modelname1_expid.nc computed_ivaf_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_smb_AIS_groupname1_modelname1_expid.nc computed_smb_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_smbgr_AIS_groupname1_modelname1_expid.nc computed_smbgr_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc computed_bmbfl_AIS_groupname1_modelname1_expid.nc computed_bmbfl_minus_ctrl_proj_AIS_groupname1_modelname1_expid.nc ... ----------> Description of variables: icearea - ice area [m^2] iareafl - floating ice area [m^2] iareagr - grounded ice area [m^2] ivol - ice volume [m^3] ivaf - ice volume above floatation [m^3] smb - spatially integrated surface mass balance [kg/s] smbgr - spatially integrated surface mass balance over grounded ice [kg/s] bmbfl - spatially integrated basal melt rate under floating ice (negative for melting ice) [kg/s] Variables per file: rhoi - model specific ice density [kg m-3] rhow - model specific ocean water density [kg m-3] time - time, in years [variable] - global variable integrated over the Antarctica ice sheet [variable]_region_1 - variable integrated over West Antarctica [variable]_region_2 - variable integrated over East Antarctica [variable]_region_3 - variable integrated over the Antarctic Peninsula [variable]_sector_X - variable integrated over the X sector of the Antarctic ice sheet (18 sectors, from 1 to 18) -------------------> Data usage notice: If you use any of these results, please acknowledge the work of the people involved in producing them. Acknowledgements should have language similar to the below. "We thank the Climate and Cryosphere (CliC) effort, which provided support for ISMIP6 through sponsoring of workshops, hosting the ISMIP6 website and wiki, and promoted ISMIP6. We acknowledge the World Climate Research Programme, which, through it's Working Group on Coupled Modelling, coordinated and promoted CMIP5 and CMIP6. We thank the climate modeling groups for producing and making available their model output, the Earth System Grid Federation (ESGF) for archiving the CMIP data and providing access, the University at Buffalo for ISMIP6 data distribution and upload, and the multiple funding agencies who support CMIP5 and CMIP6 and ESGF. We thank the ISMIP6 steering committee, the ISMIP6 model selection group and ISMIP6 dataset preparation group for their continuous engagement in defining ISMIP6." You should also refer to and cite the following papers: https://doi.org/10.5194/tc-14-3033-2020, 2020. https://doi.org/10.5194/tc-14-2331-2020, 2020.

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    Ocean salinity was recorded at 10 second intervals by a Seabird Electronics SBE 37 microCAT CTD at a nominal depth of 100 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the salinity observations at 100 m depth are from 28-10-2016 06:43:11 UTC to 13-11-2016 21:59:51 UTC. The salinity is reported in units of practical salinity. Ocean temperature was recorded at 10 second intervals by a Seabird Electronics SBE 56 thermistor at a nominal depth of 75 m in McMurdo Sound at 77.6152 °S, 164.8821 °E. The dates covered by the temperature observations at 75 m depth are from 28-10-2016 06:43:11 UTC to 13-11-2016 21:59:51 UTC. The temperature is reported in units of °C in the ITS-90 temperature scale.

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    Acoustic volume backscatter measurements were made by an ASL Environmental Sciences Acoustic Zooplankton Fish Profiler (AZFP) operating at four-frequencies (125 kHz, 200 kHz, 455 kHz and 769 kHz). README: https://store.pangaea.de/Publications/Robinson-etal_2020/AZFP2016_README.pdf Further details are provided at: Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. Geophysical Research Letters, 47, e2020GL090498. https://doi.org/10.1029/2020GL090498