Abstract:
This dataset provides model output for 20th-century ice-ocean simulations in the Amundsen Sea, Antarctica. The simulations are performed with the MITgcm model at 1/10 degree resolution, including components for the ocean, sea ice, and ice shelf thermodynamics. Atmospheric forcing is provided by the CESM Pacific Pacemaker Ensemble, using 20 members from 1920-2013. An additional simulation is forced with the ERA5 atmospheric reanalysis from 1920-2013. The simulations were completed in 2021 by Kaitlin Naughten at the British Antarctic Survey (Polar Oceans team).
Supported by UKRI Fund for International Collaboration NE/S011994/1.
Keywords:
Amundsen Sea, Antarctica, ice shelves, modelling, ocean, sea ice
Naughten, K. (2022). Amundsen Sea MITgcm model output forced with Pacific Pacemaker Ensemble, 1920-2013 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/a4ea4d64-169a-4981-a64d-c2604b52522e
| Access Constraints: | None. |
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| Use Constraints: | Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2022-02-10 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Kaitlin Naughten |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Naughten, K.A., Holland, P.R., Dutrieux, P., Kimura, S., Bett, D.T., and Jenkins, A. (2022). "Simulated twentieth-century ocean warming in the Amundsen Sea, West Antarctica". Geophysical Research Letters 49 (5). https://doi.org/10.1029/2021GL094566. Morlighem, M. 2020. MEaSUREs BedMachine Antarctica, Version 2. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/E1QL9HFQ7A8M. |
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| Quality: | Values which are identically zero or masked represent the land and ice shelf mask. | |
| Lineage: | Simulations were performed with the Massachusetts Institute of Technology general circulation model (MITgcm) version 67s, over the Amundsen Sea region (140°W:80°W, 76°S:62°S). Resolution is 1/10° in the horizontal, with 50 levels in the vertical. Bathymetry and ice shelf topography were generated using BedMachine version 2. Initial and boundary conditions were derived from the World Ocean Atlas 2018 for temperature and salinity, and the Biogeochemical Southern Ocean State Estimate iteration 122 for all other variables. Atmospheric forcing is given by the 20-member Pacific Pacemaker Ensemble for 1920-2013, as well as an additional simulation forced by the ERA5 atmospheric reanalysis for 1979-2019. The raw MITgcm output was converted to NetCDF using the xmitgcm python package, and then processed into timeseries, Hovmoellers, and trends using the mitgcm_python library (https://github.com/knaughten/mitgcm_python). |
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| Temporal Coverage: | |
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| Start Date | 1920-01-01 |
| End Date | 2013-12-31 |
| Start Date | 1979-01-01 |
| End Date | 2019-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -76 |
| Northernmost | -62 |
| Longitude | |
| Westernmost | -140 |
| Easternmost | -80 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | 0 m |
| Max Depth | 5610 m |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 1 km - < 10 km or approximately .01 degree - < .09 degree |
| Vertical Resolution | 50 vertical layers, 10-300 m |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Southern Ocean |
| Detailed Location | Amundsen Sea |
| Data Storage: | 423 NetCDF files, each containing one variable for a single simulation. The file types are timeseries (averaged/integrated over specific regions; monthly resolution), Hovmoellers (horizontally averaged over specific regions while preserving the depth dimension; monthly resolution), trend files (1920-2013 trends based on annual averages for each simulation, at each 2D or 3D point in the domain), and latitude-longitude files for 2D variables (monthly resolution). Total approximate volume 11.75 GB. |
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