### Long-term median monthly sea ice extent 1981-2010

### Data downloaded from https://noaadata.apps.nsidc.org/NOAA/G02135/south/monthly/shapefiles/shp_median/ on 2025-08-10
    Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., Windnagel, A. K. & Stafford, T. (2025). Sea Ice Index. (G02135, Version 4). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. https://doi.org/10.7265/a98x-0f50