data

/data

This dataset updates daily based on upstream updates from the Sea Ice Index dataset (NSIDC).

Processed data

The processed observations are:

• seaice-daily-[north|south].csv: historical observations for either the Arctic (north) or Antarctic (south)
• seaice-annual-[north|south].csv: annual statistics (min, mean and max) for each complete year on the record
• seaice-lowestyear-[north|south].csv: observations filtered to the year of the lowest observation (excluding this year)
• seaice-thisyear-[north|south].csv: observations filtered to this year
• seaice-iqr-[north|south].csv: the interquartile range for each day of the year over the historical period (excluding the current year). Columns include:
  • hemisphere: north or south
  • nday: The day of the year (0-366)
  • q1: The first quartile of the extent for this day
  • median: The median of the extent for this day
  • q3: The third quartile of the extent for this day

If you want to create a chart that updates automatically based on one of these files (eg. in Flourish, which supports live data sources), navigate to one of these files in GitHub, click on the "Raw" button and then copy the URL from the address bar (do not right-click the button and copy the link—it redirects).

For example, the raw URL for monthly-all.csv is:

https://raw.githubusercontent.com/360-info/tracker-seaice/main/data/seaice-daily-south.csv

Other files

last-monthly-update-[north|south].txt is a datestamp of the time of the last update on NSIDC's end. We save this at the end of an update to avoid unnecessary updates when no new data is available.