| Summary: | These scripts are used to produce the figures in Wharton et al. (2024) - Deeper and Stronger North Atlantic Gyre During the Last Glacial Maximum, Nature. Note: All model outputs are located in the compressed file data.zip, with one output per model per variable in the directory "data" after decompressing. All outputs were pre-processed using CDO commands, with all being at least 100-year long averages when possible, and some being meridional averages over the Atlantic Ocean. Outputs were all re-gridded onto a similar grid, the one of the model CESM1.2 (320x384) script_fig_4.py - calculate wind stress curl from a POP2 function (https://pop-tools.readthedocs.io/en/latest/examples/pop_div_curl_xr_xgcm_metrics_compare.html) in PMIP4 models, multi-model average. The function will then calculate the average wind stress curl for both pre-industrial (PI) and Last Glacial Maximum (LGM) in the coordinates given, and build histogram of averages, including multi-model mean. script_fig_7_toppanel.py - similar as script above but this time will generate individual maps for each PMIP4 models given. script_fig_8_bottompanel.py - similar as script_fig_4.py but for PMIP3 models. script_fig_9.py - show meridionally averaged potential densities in the northern Atlantic Ocean for some available models for both PI and LGM. script_fig_10.py - similar as above but for ocean meridional velocities and difference between PI and LGM. Spline_LGM.ipynb - script to fit a spline through LGM data, the latter of which is included in the script (Fig. 2b) Spline_MH.ipynb - same as above, but for the Mid-Holocene data (Fig. 2a) LGM_BOR_changepoint.ipynb - script to determine change point in new LGM Blake Outer Ridge data plus published data (Fig 2b). Uses .csv file ‘transect_data_LGM.csv’, which is also included in this repository. MH_BOR_changepoint.ipynb - script to determine change point in new MH Blake Outer Ridge data plus published data (Fig. 2a). Uses .csv file ‘transect_data_MH.csv’, which is also included in this repository.
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