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64 results for “MITgcm”
SOSE output analyzed in "Evaluation of MITgcm-based ocean reanalysis for the Southern Ocean" (Part 2-9)
<p>SOSE output analyzed in "Evaluation of MITgcm-based ocean reanalysis for the Southern Ocean" submitted to GMD. Complete theta data is 174GB. Thus, this dataset is separated into smaller files. These data can be accessed by accessing Zenode links (see below) or downloading from http://sose.ucsd.edu/ (recommended). </p>
MITgcm idealized test-case : cyclonic gyre in a mid-latitude closed basin
<p>Model grid data and hydrodynamic output files of the Z-coordinate Massachusetts Institute of Technology general circulation model (MITgcm) for an idealized case-study describing a cyclonic gyre in a mid-latitude closed basin.<br> <br> The domain size is (Ni,Nj,Nk)=(256,256,60).<br> <br> The grid files (Computational_[...]) contain single precision variables (4 bytes), while the hydrodynamic output files contain variables stored in double precision (8 bytes).<br> </p>
EWilson_MITgcm_SPG_input_files_v001
<p>Upload of input files for MITgcm described in the following study:</p> <p>Wilson EA, Thompson AF, Stewart AL, Sun S. Bottom-up control of subpolar gyres and the overturning circulation in the Southern Ocean. Journal of Physical Oceanography. Submitted.</p>
restart (/ pickup) for MITgcm configuration hs94.cs-32x32x5
<p>Pickup was generated by running the verification experiment forward for 43200 time steps.</p> <p>This can be used to restart the model from a typical solution (rather than starting from rest).</p> <p>Files included : </p> <p>- STDOUT.0000<br> - pickup.0000043200.data<br> - pickup.0000043200.meta</p> <p> </p>
mitgcm_code_input_and_output_for_amundsen_runoff_study
<p>This repository contains all inputs and code to carry out subglacial runoff-forced experiments of the Amundsen Sea Embayment using the modelling framework MITgcm.</p> <p>expt_code/ contains specialised code files for the experiment</p> <p>modified_code/ contains main code trunk files that were modified from checkpoint 67v</p> <p>input/ contains experiment-specific binary and parameter files</p> <p>outputs/ contains .mat files which contain all relevant output for analysis</p>
MITgcm West Antarctic Slope Undercurrent process-oriented model (MITgcm_UC)
<p><strong>MITgcm_UC.zip</strong>: The Matlab scripts used to generate, run and analyze the MITgcm simulations.</p> <ul> <li>MITgcm_UC/newexp_uc: The Matlab scripts used to generate and run the MITgcm simulations.</li> <li>MITgcm_UC/analysis_uc: The Matlab scripts used to calculate products and make figures.</li> </ul> <p><strong>products.zip</strong>: The products calculated from MITgcm_UC model diagnostics and the data used to make figures for the manuscript.</p> <p><strong>All the raw data of the model output are available at: <a href="https://doi.org/10.15144/S4QP4N">https://doi.org/10.15144/S4QP4N</a>.</strong></p> <p>Matlab scripts for vorticity budget analysis in MITgcm_UC/analysis_uc:</p> <ul> <li>calc_all_vorticity.m: A convenient script to load experiments and calculate the vorticity budget</li> <li>functions/calc_BCvorticity_cdw_sw.m: Calculate the vorticity budget for the CDW layer and the surface layer, respectively, after interpolating the momentum budget terms onto a much finer vertical grid (3400 layers in the vertical direction).</li> <li>calc_IceShelfPressureTorque.m: Calculate the pressure torque exerted from the ice shelf to the CDW layer or the surface layer.</li> <li>functions/calc_BCvorticity_ISPT.m: Calculate the decomposition of the pressure torque in the vorticity budget, including the ice-shelf pressure torque, bottom pressure torque, and interfacial pressure torque.</li> <li>functions/calc_BCvorticity_PVint.m: Calculate the potential vorticity of the CDW layer, select PV contours, and then cumulatively integrate the vorticity budget terms for the selected area. </li> <li>plots/fig4_new.m: Plot the vorticity budget (Extended Data Figs. 3 and 6 in the manuscript)</li> <li>plots/fig5_addCDWflux.m: Plot the area-integrated vorticity budget (Fig. 2 of the manuscript)</li> <li>plots/plot_stretch_new.m: Estimated pressure torques of the CDW layer using bottom vertical velocity, the vertical velocity across the upper bound of the CDW layer and the diapycnal velocity. (Extended Data Fig. 4 of the manuscript)</li> </ul> <p><br>Feel free to contact Yidongfang Si via y_si@mit.edu if you have any questions.</p>
MITgcm Alboran Sea Velocities 2007-2008
<p>uvAdepth*.mat: Daily-mean velocities at various depth levels (1 is top 5m), rotated so that positive U is east and positive V is north. Full 426 days of forced model run, starting Nov 1 2007 ending Dec 31 2008.</p> <p>uvNativeAve148.mat: first 148-day mean grid-aligned u and v, all 46 levels.</p> <p>geometrySpinupSteady.mat: full grid information</p> <p>rdmds: was used to read data from binary to matlab</p> <p>makeuv: used to rotate velocities.</p> <p>Velocities are from the MITgcm in hydrostatic mode (Marshall et al. 1997), configured similarly to Sanchez- Garrido et al. (2013) but with increased horizontal resolution in the western Alboran. This model solves the Boussinesq form of the Navier-Stokes equations for an incompressible fluid with a finite-volume spatial discretization on a curvilinear grid with typical horizontal resolution of 1- 3km. The vertical grid has 5m resolution at the surface, decreasing with depth to 403m, for a total of 46 levels. The model domain includes the Strait of Gibraltar and has open boundaries in the Atlantic and Mediterranean.</p> <p>Surface forcings are the ERA-Interim reanalysis daily heat and salt fluxes at 0.75km resolution, and the IFREMER CERSAT 6-hourly 10m Global Blended Mean Wind Fields at 1/4-degree. Open east and west ocean boundaries are forced with daily 1/12-degree velocity, salinity, and temperature from the Atlantic-Iberian Biscay Irish-Ocean Physics Reanalysis with a sponge layer of 80 km width and a 1 hour relaxation timescale.</p> <p>Initial conditions for temperature and salinity are from the September model output from Sanchez-Garrido et al. (2013), but averaged over the full month and the latitudinal extent of the basin, leaving only east-west and vertical gradients; this smoothing allowed a more stable circulation to develop. The model was spun up for 55 simulated days without atmospheric forcing and with constant fall 2007 average ocean boundary conditions. Over 75 further simulated days, mean fall 2007 atmospheric forcing was added, followed by a transition to mean October and then November forcing for both the atmosphere and ocean boundaries. After this total of 130 days spinup, the fully-forced simulation began running from November 1, 2007. The model run ends December 31 2008.</p>
Namelists required to run sea ice and physics configuration of MITgcm for the West Antarctic Peninsula
<p>This dataset contains the namelists that describe the initial conditions, forcing files and specific package configurations used to run a sea ice and ocean physics configuration of the MITgcm (general circulation model) for the West Antarctic Peninsula (WAP). </p>
MITgcm Alboran Sea Budgets and Manifolds Nov 2007-Mar 2008
<p>Eulerian volume, temperature, salinity, and momentum budget components for the Western Alboran Gyre. Also Lagrangian manifolds for the edge of the WAG; their frequency maps; and the isopycnal velocity maps they are derived from.</p>
MITgcm Alboran Sea 2007-2008 TSUVW
<p>Raw binary files for daily potential temperature (Tave), salinity (Save), and velocity (UVW) from the MITgcm in hydrostatic mode (Marshall et al. 1997), configured similarly to Sanchez- Garrido et al. (2013) but with increased horizontal resolution in the western Alboran. This model solves the Boussinesq form of the Navier-Stokes equations for an incompressible fluid with a finite-volume spatial discretization on a curvilinear grid with typical horizontal resolution of 1- 3km. The vertical grid has 5m resolution at the surface, decreasing with depth to 403m, for a total of 46 levels. The model domain includes the Strait of Gibraltar and has open boundaries in the Atlantic and Mediterranean.</p> <p>Surface forcings are the ERA-Interim reanalysis daily heat and salt fluxes at 0.75km resolution, and the IFREMER CERSAT 6-hourly 10m Global Blended Mean Wind Fields at 1/4-degree. Open east and west ocean boundaries are forced with daily 1/12-degree velocity, salinity, and temperature from the Atlantic-Iberian Biscay Irish-Ocean Physics Reanalysis with a sponge layer of 80 km width and a 1 hour relaxation timescale.</p> <p>Initial conditions for temperature and salinity are from the September model output from Sanchez-Garrido et al. (2013), but averaged over the full month and the latitudinal extent of the basin, leaving only east-west and vertical gradients; this smoothing allowed a more stable circulation to develop. The model was spun up for 55 simulated days without atmospheric forcing and with constant fall 2007 average ocean boundary conditions. Over 75 further simulated days, mean fall 2007 atmospheric forcing was added, followed by a transition to mean October and then November forcing for both the atmosphere and ocean boundaries. After this total of 130 days spinup, the fully-forced simulation began running from November 1, 2007. The model run ends December 31 2008.</p>
Surface Kinetic energy from MITgcm-GEOS5 Coupled Ocean-Atmosphere Simulation
<p>Annual mean of surface kinetic energy computed from MITgcm-GEOS5 coupled ocean-atmosphere simulation, with a spacing grid of 4 km.</p> <p>The temporal coverage for the annual mean spans from March 01, 2020, to March 01, 2021.</p>
MITgcm model setup and output for "What determines the shape of the Pine-Island-like ice shelf?"
<p><strong>(Contents)</strong><br> Here it contains<br> <br> jim_run3 = CTRL (Similar to Jordan et al., 2018 but with smaller ocean)</p> <p>melt/run/ = IOCTRL, M(all)V(dyn)U(dyn)</p> <p>melt2/ = M( changing, see below ) V( dyn ) U( 0 )<br> melt2/run/ = M(all)V(dyn)U(0)<br> melt2/run2/ = M(20)V(dyn)U(0)<br> melt2/run3/ = M(GL10)V(dyn)U(0)<br> melt2/run4/ = M(GL20)V(dyn)U(0)</p> <p><br> melt3/ = M ( changing, see below ) V( changing ) U( 0 )<br> melt3/run5/ = M(all)V(2000)U(0)<br> melt3/run10/ = M(20)V(2000)U(0)</p> <p>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br> Input melt data for running ice only experiments<br> #data.streamice#<br> meltCTRL.bin = M(all) ... melt rate data of CTRL for every time steps <br> meltCTRL2.bin = M(GL10)<br> meltCTRL3.bin = M(20 m/a)<br> meltCTRL4.bin = M(GL20)</p> <p>Input velocity data for running ice only experiments <br> melt3/<br> uvel_ext4.bin = U(0 m/a)<br> vvel_ext5.bin = V(2000 m/a)</p> <p><strong>(How to compile and run)</strong><br> mkdir build<br> cd build/<br> module load intel/2021.2.0<br> module load impi/2021.2.0<br> export LANG=en_US.UTF-8<br> export LC_ALL=en_US.utf8<br> ../../../tools/genmake2 -of ../../../tools/build_options/linux_amd64_ifort+mpi_ice_nas_tokyo3 -mpi -mods ../code/<br> make depend<br> export LANG=en_US.UTF-8<br> export LC_ALL=en_US.utf8<br> make -j 16</p> <p> mkdir ../run<br> cd ../run/<br> cp ../build/mitgcmuv .<br> cp ../input/* .<br> pjsub job*.pbs<br> <br> <strong>Other important links</strong><br> https://github.com/hgu784/MITgcm_67s<br> <br> For more info please send an email to Yoshihiro.Nakayama@lowtem.hokudai.ac.jp</p>
Tracer diffusivity in an idealized MITgcm simulation
<p>Model setup files, output data and python scripts that are used for a submitted manuscript to JAMES.</p>
one dimensional model configurations for MITgcm+Darwin3
<p>Contents:</p> <ul> <li>code_2+1+0_1D</li> <li>code_31+16+3_RT_1D</li> <li>code_6+4+0_1D</li> <li>code_6+4+0_RT_1D</li> <li>code_6+4+0_RT_QUOTA_1D</li> <li>diagnostics</li> <li>input_2+1+0_1D</li> <li>input_31+16+3_RT_1D</li> <li>input_6+4+0_1D</li> <li>input_6+4+0_RT_1D</li> <li>input_6+4+0_RT_QUOTA_1D</li> </ul>
MITgcm input data for experiments in Trencham et al. 2024
<p>This dataset includes the input and configuration files for simulations performed using the MITgcm, published in Trencham et al. 2024 (The Impact of Oceanic Feedbacks on Stratosphere-Troposphere Coupling in an Idealised Model). It includes data for fixed-SST experiments (fixed_sst_runs), slab-ocean experiments (slab_ocean_runs), and fully coupled atmosphere-ocean runs (coupled_runs). The latter folder also includes model pickup files corresponding to the last few decades that the control fully coupled simulation was run until, after over 2000 years of model adjustment. The fixed-SST and slab-ocean runs are run from cold using the initial potential temperature and humidity profiles included (theta_cs_a47.bin and q_cs_a47.bin), and take approximately 200 days and 10 years to equilibriate respectively. For further details, see Trencham et al. 2024 and/or contact the corresponding author.</p>
MITgcm code output for TGT and TEIS
<p>TGT_case.zip: The output of the MITgcm simulation for an Ice Grounding Zone (IGZ) length of 15km and a Thermal Forcing (TF) of 3.75 C is provided.</p> <p>TEIS_case.zip: The output of the MITgcm simulation for an IGZ length of 14km and TF of 3.2 C is provided.</p> <p>The Matlab codes, data, and binary files that serve as input for the MITgcm model are also provided, along with a compiled MITgcm model.</p>
SOSE output analyzed in "Evaluation of MITgcm-based ocean reanalysis for the Southern Ocean" (Part 2-6)
Open the record for dataset details and reuse information.
SOSE output analyzed in "Evaluation of MITgcm-based ocean reanalysis for the Southern Ocean" (Part 2-4)
Open the record for dataset details and reuse information.
MITgcm model setup and output for "Antarctic Slope Current modulates ocean heat intrusions towards Totten Glacier"
<p>MITgcm model setup and output for "Antarctic Slope Current modulates ocean heat intrusions towards Totten Glacier</p> <p>Here, it contains the results of the East Antarctic simulation from 1992-2016. Model grid is lat-lon similar to LLC1080 grid resolution roughly 3-4 km in the region. See Nakayama et al., submitted to GRL for detail. </p> <p><strong>(Contents)</strong><br> code.zip (code to run this simulation)<br> input.zip (input file required for this simulation)<br> results_zenodo.zip (due to size limit of 50GB, please check <a href="https://ecco.jpl.nasa.gov/drive/files/ECCO2/LatLon_East_Antartic">https://ecco.jpl.nasa.gov/drive/files/ECCO2/LatLon_East_Antarctic</a> for complete model output. Complete datasets can also be obtained by rerunning the simulation.)</p> <p><strong>(How to build and run)</strong><br> mkdir build<br> ./../../tools/genmake2 -of ../../../tools/build_options/linux_amd64_ifort+mpi_ice_nas -mpi -mods ../code/<br> make depend<br> make -j 16<br> cd ..<br> mkdir test<br> cd test<br> ln -sf ../input/* .<br> ln -sf /nobackup/hzhang1/forcing/era_xx/ .<br> cp ../build/mitgcm_uv .<br> qsub run_omp_high_t1.pbs</p>
MITgcm 2.8deg Transport Matrix configuration
<p>This repository contains transport matrices and associated data for the MITgcm 2.8deg configuration. For the most recent version of these files go to: http://kelvin.earth.ox.ac.uk/spk/Research/TMM/TransportMatrixConfigs/. The Transport Matrix Method driver code is available from https://github.com/samarkhatiwala/tmm.</p>
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