July 27 2023: Over the past week, the sea ice had a decrease, since last week, by a lower rate of 6.58%, from the level on 07/20/2023 of
7.640 M km2 to 7.137 M km2 for this week.
The negative sea ice anomaly this week was higher than the anomaly of -1.367 M km2 on 07/20/2023. The anomaly rose to -1.296 M km2 on 07/27/2023 and so is less anomalously negative for this time of year than last week.
In the waters around Antarctica, 2023 stands out as an extremely low sea ice year. The record began in 1979 and the sea ice extent this current austral winter season is outside of 6 standard deviations (SD) for the time series. Note that the grey shading in our Arctic sea ice plots (like the one above) is usually two standard deviations, whereas the below plot for Antarctic waters shows six SD. The current situation around Antarctica is a truly extreme deviation from what could be considered normal for the austral sea ice season.