Dataset associated with paper "Topographic hotspots of Southern Ocean eddy upwelling"

<p><strong>Data repository for Yung, Morrison and Hogg (2022) <em>Topographic hotspots of Southern Ocean eddy upwelling</em>, submitted to Frontiers in Marine Science</strong></p> <p>&nbsp;</p> <p>This repository contains processed data, created using scripts available in the github repository <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code</a>.</p> <p>&nbsp;</p> <p>The data comes from the repeat year atmospheric forcing version of the ACCESS-OM2 modelling suite 0.1 degree model (see Kiss et al. (2020), http://www.cosima.org.au, model available at <a href="https://github.com/COSIMA/access-om2">https://github.com/COSIMA/access-om2</a>). The model was spun up for 270 years, and the next 10 years of output were used.</p> <p>&nbsp;</p> <p>Daily resolution data was used in the calculation of quantities, which results in a large amount of raw data (~4TB for Southern Ocean latitudes (35-70S), 10 years). Therefore, we only provide relevant processed data. Details of these calculations are available in the above github repository.</p> <p>&nbsp;</p> <p>Any quantities calculated along sea surface height contours are labelled with a letter. These are referred to in the following table.</p> <p>&nbsp;</p> <p>| Letter |&nbsp; SSH&nbsp; |</p> <p>| :---:&nbsp; | :---: |</p> <p>|&nbsp;&nbsp; A&nbsp;&nbsp;&nbsp; | -0.1m |</p> <p>|&nbsp;&nbsp; B&nbsp;&nbsp;&nbsp; | -0.2m |</p> <p>|&nbsp;&nbsp; C&nbsp;&nbsp;&nbsp; | -0.3m |</p> <p>|&nbsp;&nbsp; D&nbsp;&nbsp;&nbsp; | -0.4m |</p> <p>|&nbsp;&nbsp; E&nbsp;&nbsp;&nbsp; | -0.5m |</p> <p>|&nbsp;&nbsp; F&nbsp;&nbsp;&nbsp; | -0.6m |</p> <p>|&nbsp;&nbsp; G&nbsp;&nbsp;&nbsp; | -0.7m |</p> <p>|&nbsp;&nbsp; H&nbsp;&nbsp;&nbsp; | -0.8m |</p> <p>|&nbsp;&nbsp; I&nbsp;&nbsp;&nbsp; | -0.9m |</p> <p>|&nbsp;&nbsp; J&nbsp;&nbsp;&nbsp; | -1.0m |</p> <p>|&nbsp;&nbsp; K&nbsp;&nbsp;&nbsp; | -1.1m |</p> <p>|&nbsp;&nbsp; L&nbsp;&nbsp;&nbsp; | -1.2m |</p> <p>|&nbsp;&nbsp; M&nbsp;&nbsp;&nbsp; | -1.3m |</p> <p>|&nbsp;&nbsp; N&nbsp;&nbsp;&nbsp; | -1.4m |</p> <p>|&nbsp;&nbsp; O&nbsp;&nbsp;&nbsp; | -1.5m |</p> <p>|&nbsp;&nbsp; P&nbsp;&nbsp;&nbsp; | -0.15m|</p> <p>|&nbsp;&nbsp; Q&nbsp;&nbsp;&nbsp; | -0.25m|</p> <p>|&nbsp;&nbsp; R&nbsp;&nbsp;&nbsp; | -0.35m|</p> <p>|&nbsp;&nbsp; S&nbsp;&nbsp;&nbsp; | -0.45m|</p> <p>|&nbsp;&nbsp; T&nbsp;&nbsp;&nbsp; | -0.55m|</p> <p>|&nbsp;&nbsp; U&nbsp;&nbsp;&nbsp; | -0.65m|</p> <p>|&nbsp;&nbsp; V&nbsp;&nbsp;&nbsp; | -0.75m|</p> <p>|&nbsp;&nbsp; W&nbsp;&nbsp;&nbsp; | -0.85m|</p> <p>|&nbsp;&nbsp; X&nbsp;&nbsp;&nbsp; | -0.95m|</p> <p>|&nbsp;&nbsp; Y&nbsp;&nbsp;&nbsp; | -1.05m|</p> <p>|&nbsp;&nbsp; Z&nbsp;&nbsp;&nbsp; | -1.15m|</p> <p>|&nbsp;&nbsp; Z1&nbsp;&nbsp; | -1.25m|</p> <p>|&nbsp;&nbsp; Z2&nbsp;&nbsp; | -1.35m|</p> <p>|&nbsp;&nbsp; Z3&nbsp;&nbsp; | -1.45m|</p> <p>&nbsp;</p> <p>There are two versions of the along-contour coordinates for each contour. The latlon named files are more useful for analysis, the other is used while computing transport across contours. These are made using <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/make_contour.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/make_contour.ipynb</a>.</p> <p>&nbsp;</p> <p>Distance along contour files contain the cumulative distance along the contour in 10^3 km from 80E (<a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Figure_Code/Fig7-upwelling_characteristics.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Figure_Code/Fig7-upwelling_characteristics.ipynb</a>). Dimensions are contour index, counting from 80E. There are also segment length files of each part of the contour.</p> <p>&nbsp;</p> <p>vh_eddy files contain the eddy transport across the contours, averaged over 10 years. These are calculated by taking the time mean of the residual transport (<span class="math-tex">\(\overline{vh}\)</span>), e.g. SO_L_vol_trans_across_contour_binned.nc, and subtracting the mean transport&nbsp;<span class="math-tex">\(\overline{v}\overline{h}\)</span>, calculated from the time mean isopycnal thicknesses along contours (e.g. SO_L_dzu_across_contour_binned) and the time mean velocity, <span class="math-tex">\(v = vh/h\)</span> (calculated in <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_and_bin_along_contours.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_and_bin_along_contours.ipynb</a>). The full files are provided for the contour L (SSH=-1.2 m) as is provided in the paper manuscript Fig. 6. These eddy transports have dimensions of sigma1 and contour index (the two extra SO_L files have time too).</p> <p>&nbsp;</p> <p>vh_eddy_interp files contain the interpolated eddy transports at hotspots, for the density range 1032.2kg/m^3 &lt;= sigma_1 &lt;= 1032.5kg/m^3. Calculation method provided at <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Interpolation_between_contours.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Interpolation_between_contours.ipynb</a>.</p> <p>&nbsp;</p> <p>We also provide files that summarise the transport in density and SSH space for hotspots and the circumpolar total. See <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/UpwellingArmDefn.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/UpwellingArmDefn.ipynb</a> for calculation details. The exact names and specifications are provided in the README.</p> <p>&nbsp;</p> <p>We provide 10 year mean files of the energy conversion and energy terms over the Southern Ocean latitude range. These are made by binning daily transports and layer thicknesses into sigma 1 bins over the Southern Ocean (<a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Binning_SouthernOcean_code.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Binning_SouthernOcean_code.ipynb</a>) and then calculating energy terms (<a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_MKE_EKE.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_MKE_EKE.ipynb</a>, <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_Energy_Conversion_Terms.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/Save_Energy_Conversion_Terms.ipynb</a>)</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>The files named with contour_energies contain the EKE, Form stress and Reynolds stress averaged over 10 years but extracted along the same contours as eddy transport. <a href="https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/save_energy_terms_along_contours.ipynb">https://github.com/claireyung/Topographic_Hotspots_Upwelling-Paper_Code/blob/main/Analysis_Code/save_energy_terms_along_contours.ipynb</a></p> <p>&nbsp;</p> <p>We also provide 10 year averaged density binned transport, layer thickness and densities.</p> <p>&nbsp;</p> <p>Please refer to the README file for additional details.</p>