https://doi.org/10.25773/bt54-sj65

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Document Type

Data

Department/Program

Virginia Institute of Marine Science

Publication Date

1-2023

Spatial Information

Longitude 90-140 deg.W, Latitude 68-76 deg.S (Amundsen Sea, Antarctica)

Abstract

A three-dimensional numerical model of the Amundsen Sea (Antarctica) was used to simulate the period Jan.2006-Mar.2022 under consistent atmospheric/oceanic forcings, bathymetry/ice shelf topography, and model equations/parameters. The model is an implementation of the Regional Ocean Modeling System (ROMS, https://www.myroms.org/) with extensions for sea ice (Budgell 2005) and ice shelves (Dinniman et al. 2011). It simulates the ocean hydrography and circulation, sea ice thermodynamics and dynamics, and the basal melt of the ice shelves, with a uniform horizontal mesh of 1.5km and 20 topography-following vertical levels. Forcings include the ERA5 reanalysis (3-hourly), 10 tidal constituents from CATS 2008, and ocean/sea ice conditions at the edges of the model domain taken from the 5km-resolution circumpolar model of Dinniman et al. 2020 and from daily SSM/I satellite images. The model outputs are divided into nine directories each containing two years worth of model results (run661-669) in the NetCDF format. Each directory contains: daily-averaged model fields (roms_avg_xxxx.nc), instantaneous snapshots every 3 hours for select fields (roms_qck_xxxx.nc), and instantaneous snapshots every 30 days (roms_his_xxxx.nc). All the metadata information necessary for the interpretation of the model outputs (dimensions, units, etc) is included inside the NetCDF files. The NetCDF files follow the CF conventions and can be opened with various software that are open source and freely available over the Internet. In addition to the model outputs, this archive includes the computer code as well as the input files necessary for reproducing the model outputs of this archive.

Description

File Description:

  • readme.txt : Background information on the numerical simulation.
  • code_v20230107.zip : The computer code used for the computer simulation.
  • depths.m : A Matlab/Octave script computing the vertical position of the 3D model grid boxes at a given time.
  • run601/roms_avg_xxxx.nc : Daily-averaged model fields (30 days of results per file) for years 2006-2007.
  • run601/roms_qck_xxxx.nc : Instantaneous snapshots every 3 hours for select model fields (30 days of results per file) for years 2006-2007.
  • run601/roms_his_xxxx.nc : Instantaneous snapshot of model fields every 30 days for years 2006-2007.
  • run602/ : Same as run601, but for years 2008-2009.
  • run603/ : Same as run601, but for years 2010-2011.
  • run604/ : Same as run601, but for years 2012-2013.
  • run605/ : Same as run601, but for years 2014-2015.
  • run606/ : Same as run601, but for years 2016-2017.
  • run607/ : Same as run601, but for years 2018-2019.
  • run608/ : Same as run601, but for years 2020-2021.
  • run609/ : Same as run601, but for Jan.-Mar. 2022. input_files/grd_amicus1076x516_2010_v20220703.nc : Grid file for the ROMS simulation.
  • input_files/roms_ini.nc : Initial condition for the ROMS simulation. input_files/tides_amicus1076x516_v20211128.nc : Tidal forcing for the ROMS simulation.
  • input_files/nud_amicus1076x516x20_v20220915.nc : Nudging rates for relaxation over the off-shelf region (abyssal plain).
  • input_files/bry_amicus1076x516x20_ssmiyyyy_vxxxxxxxx.nc : Lateral boundary conditions for year yyyy.
  • input_files/clm_amicus1076x516x20_yyyy_vxxxxxxxx.nc : Climatological fields for relaxation over the off-shelf region (abyssal plain; year yyyy).
  • input_files/frc_amicus_era5_yyyy_swrad0.71_vxxxxxxxx.nc : Atmospheric forcing for year yyyy.

Keywords

Amundsen Sea, Antarctica, model, ocean, sea ice, ice shelves, continental shelf, polynyas, ROMS, polar, southern ocean

Publication Statement

ORCID: 0000-0002-1700-9509 (Pierre St-Laurent)

Funding

This research was supported by NASA award 80NSSC21K0746 (Antarctic sea ice, fast ice and icebergs: Modulators of ocean-ice shelf interactions (AMICUS)) and by NSF award 1941292 (NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)). The authors acknowledge William & Mary Research Computing (https://www.wm.edu/it/rc) for providing computational resources and/or technical support that have contributed to the results reported within this dataset.

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