Zero-degree isotherm latitude (ZIL) position over Antarctica: Historical and Projections

This is the dataset associated to the research 'Southward migration of the zero-degree isotherm latitude over the Southern Ocean and the Antarctic Peninsula: extent and implications' published in Science of the Total Environment.

This repository contains:

• ZIL_ERA5_1957-2020_position.zip: Historical position of the ZIL for every longitude point in ERA5 from 1957 to 2020 for different seasons. Files named:
  • ZIL_ERA5_1957-2020[season]position.csv
    • Dimensions: [lons, years]
    • Units: degrees latitude
• ZIL_ERA5_1957-2020_timeseries.csv: Historical spatially averaged position of the ZIL for Antartica (Ant) and the Antarctic Peninsula (AP) in ERA5 from 1957 to 2020 for different seasons. File named:
  • ZIL_ERA5_1957-2020_timeseries.csv
    • Dimensions: [years, season_area]
    • Units: degrees latitude
• ZIL_ERA5_1957-2020_meanposition.csv: Historical temporally averaged position of the ZIL in ERA5 from 1957 to 2020 for different seasons and months. File named:
  • ZIL_ERA5_1957-2020_meanposition.csv
    • Dimensions: [lons, season/month]
    • Units: degrees latitude
• ZIL_CEMIP6_Historical_position.zip: Mean position of the ZIL for every longitude point in Historical simulations of CEMIP6 from 1957 to 2014 for different seasons. Files named:
  • ZIL_CEMIP6_Hist_[season]_position.csv
    • Dimensions: [lons, models]
    • Units: degrees latitude
• ZIL_CEMIP6_SSP2-45.zip: Mean position of the ZIL for every longitude point under the SSP2-4.5 scenario in CEMIP6 for the period 2040-69 and 2070-90 for different seasons. Files named:
  • ZIL_CEMIP6_SSP2-45_2040-69_[season]_position.csv
    • Dimensions: [lons, models]
    • Units: degrees latitude
  • ZIL_CEMIP6_SSP2-45_2070-99_[season]_position.csv
    • Dimensions: [lons, models]
    • Units: degrees latitude
• ZIL_CEMIP6_SSP5-85.zip: Mean position of the ZIL for every longitude point under the SSP5-8.5 scenario in CEMIP6 for the period 2040-69 and 2070-90 and trends for the period 2015-99 for different seasons. Files named:
  • ZIL_CEMIP6_SSP5-85_2040-69_[season]_position.csv
    • Dimensions: [lons, models]
    • Units: degrees latitude
  • ZIL_CEMIP6_SSP5-85_2070-99_[season]_position.csv
    • Dimensions: [lons, models]
    • Units: degrees latitude

seasons are:

• ANN: Annual mean
• DJF: December-January-February (Summer)
• MAM: March-April-May (Autumn)
• JJA: June-July-August (Winter)
• SON: September-October-November (Spring)

areas are:

• Ant: All Antarctica
• AP: Antarctic Peninsula

Note: CEMIPT6 models include a column with CEMIP6 model average

Version control

v1.0 - Initial version
v1.1 - Change ERA5 dataset calculations from preliminary version of ERA5 to final version of ERA5

How to cite

If you use this dataset, please cite the accompanying paper as:

Complementary code

You can find the jupyter notebooks to complement the research in: https://doi.org/10.5281/zenodo.10063849

Contact

If you have any question, please contact with Sergi at sergi.gonzalez@slf.ch