The bottom plot shows the departure from average air temperature from November 1, 2022, to March 15, 2023. The top plot shows the departure from average air temperature in Antarctica at the 925 hPa level, in degrees Celsius, from February 1, 2023, to March 15, 2023, relative to the 1991 to 2020 reference period. However, the frequency of melting slightly for the Wilkins and George VI Ice Shelf areas, and the extensive melt ponding seen in December and January slowly froze over. The northern Larsen C continued to see above-average melting, with 10 days more than average in the 45-day window (Figure 1c). In the latter part of the melt season, melting was limited almost entirely to the Peninsula areas. Although some groups reported high temperatures and melting over the Ross Ice Shelf in early January, satellite measurements reported no evidence of melting there at that time. Overall, Antarctica’s seasonal melt-day total was slightly higher than the 1990 to 2020 average, with significant melt extent events (exceeding the upper decile range) around December 20, January 20, and February 5. The Wilkins Ice Shelf, southwest of the Peninsula, had over 70 days of surface melting for the same time period. During that same time period, some areas of the Larsen C Ice Shelf showed more than 30 days of melt above the average melt days for the 1990 to 2020 reference period (Figure 1b).
In the Peninsula, the northern half of the Larsen C Ice Shelf experienced up to 60 days of melt between November 1 and March 15. However, these small totals represent an above average melt season for the Getz and Roi Baudoin Ice Shelves. Melting of the Antarctic Ice Sheet from November to mid-March followed a pattern, where both sides of the Antarctic Peninsula had extensive and frequent melting while elsewhere along the coast patches of melt rarely exceeded 10 days for the season (Figure 1a). Reds indicate more melt than average blues indicate less melt.Ĭredit: E. These maps show the number of melt days from February 1 to March 15, 2023, as a difference from average relative to the 1990 to 2020 reference period. We post analysis periodically as conditions warrant.Ĭlick an image for a high-resolution version.įigure 1c. Get daily satellite images and information about melting on the Greenland ice sheet. Occasional short-term delays and data outages do occur and are usually resolved in a few days. However, visitors may notice that the date on the image is occasionally more than one day behind.
Nasa picture of the day ice fall europa update#
The daily image update is produced from near-real-time operational satellite data, with a data lag of approximately one day. The daily image update isn’t current why? Read about the data and other problems which occasionally occur in near-real-time data. We are working to improve the ice sheet mask.
This issue does not affect trends for the entire ice sheet. This is a false melt signal from seasonal snow and patchy ice areas, where our method of determining surface melting does not work. Note that the northeast coast (northern Peary Land and Kronprince Christian Land) is showing erroneous melt pixels. The Cumulative Melt Days image (right) shows the total number of days that melt occurred, year to date.Īreas along the coast are masked out because the satellite sensor’s resolution is not fine enough to distinguish ice from land when a pixel overlaps the coast. The Daily Melt image (left) shows where the surface of the Greenland Ice Sheet showed melt on that day. The Greenland melt images here are updated daily, with a one-day lag.
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