Inte helt nytt, från mars 2018
Sea ice cover in Antarctica has dropped to its second-lowest on record, Australian authorities said Friday, adding that it was not yet clear what was driving the reduction after several years of record-highs.
The minimum record was set in March last year, when a summertime reading of 2.07 million square kilometres was recorded, the AAD, which manages Australia’s Antarctic programme, said.
Last year also saw near record-lows for the wintertime maximum sea ice cover, at 18.05 million square kilometres.
Grafiken nedan gäller förändringen av massan av landisen på Antarktis.
Data from NASA’s GRACE satellites show that the land ice sheets in both Antarctica (upper chart) and Greenland (lower) have been losing mass since 2002. Both ice sheets have seen an acceleration of ice mass loss since 2009. (Source: GRACE satellite data)
Please note that the most recent data are from June 2017, when the GRACE mission concluded science operations. New data from GRACE’s successor mission, GRACE Follow-On, will be displayed when it becomes available.
Källa: https://climate.nasa.gov/vital-signs/ice-sheets/ (Grafen om Grönland finns via länken.)
Tidigare om GRACE: https://urminsynvinkel.wordpress.com/2019/05/31/hur-mater-man-jordens-gravitation-med-satelliter/