Lmst

Like for the MSG product, the MTG product is a level 3, hourly, sub-skin Sea Surface Temperature derived from Meteosat at 0° longitude, covering 60S-60N and 60W-60E and re-projected on a 0.05° regular grid, in GHRSST compliant netCDF format.

#OSISAF @eumetsat #GHRSST

The MTG product benefits from the higher temporal and spatial resolution of MTG, but the output files have the same temporal and spatial sampling as the MSG product.

In July 2025, the #SeaIce global extent was 8.9% below 1991-2020 mean. Since the beginning of records (1978):
- #Arctic, 4th lowest monthly mean, with 9.9% less extent than normal (-906.931 km²)
- #Antarctic, 3rd lowest monthly mean, with 8.3% less exent than normal (-1.363.243 km²)
For more: https://osisaf-hl.met.no/v2p2-sea-ice-index
#ClimateChange #OSISAF @eumetsat

Graph showing the Arctic Sea Ice Extent daily value for each year since 1978 (each year is represented with a curve of a different color)

Graph showing the Antarctic Sea Ice Extent daily value for each year since 1978 (each year is represented with a curve of a different color)

In June 2025, the #SeaIce global extent was 7.9% below 1991-2020 mean. Since the begining of record (november 1978):
- #Arctic, 2th lowest June monthly mean, with 6.4% less extent than normal (-733 404km²)
- #Antarctic, 3th lowest June monthly mean, with 9.1% less exent than normal (-1 255 507km²)

for more: https://osisaf-hl.met.no/v2p2-sea-ice-index

#ClimateChange #OSISAF

Graph showing the Arctic Sea Ice Extent daily value for each year since 1979(each year is represented with a curve fof a different color)

Graph showing the Antrctic Sea Ice Extent daily value for each year since 1979 (each year is represented with a curve fof a different color)

We have never measured so little #SeaIce around #Svalbard #Norway in mid November.

The #OSISAF satellite-based timeseries goes back to the late 1970s.

-> https://cryo.met.no/en/sea-ice-index-sval

A timeseries plot of #SeaIce cover area around Svalbard by day of year for several years. Yellow line for 2020, blue line for 2012, grey lines for 1981-2010. Black curve for 2024.

What an almost pleasant behavior of the global sea-ice extent
- almost reaching the bottom line (=previous minimum extents) from below.

Source: #OSISAF

The graph shows the daily global sea-ice extent for 2023 up until October 22. In addition, the ice extent for the five recent years (2018-2022) is shown in blue-green colors. In the background, the 1981-2010 climatology is shown in grey tones together with dashed curves for the daily minimum and maximum extents.
Source data is OSI SAF sea-ice index v2.2

The ocean sector offshore of Queen Maud Land in #Antarctic lacks about 1 million km² of sea-ice cover compared to normal conditions.

The sea-ice extent has been dropping fast the recent days...📉

Source: #OSISAF

Map showing Antarctic sea-ice concentration anomaly for October (day 1 to 17) 2023 relative to the baseline of 1981-2010 October (day 1 to 17) mean. The sector of Queen Maud Land used for sea-ice extent computation is indicated with a blue box.
Source data is from OSI SAF sea-ice concentration CDR/ICDR v3.0

A line graph showing the time series of daily sea-ice extent for the Queen Maud Land sector for every year from 1978 to 2023. Each year-line is coloured in decadal-grouped colorscales. The line for 2023 is outlined in black and shows a significantly lower extent than all previous years. The source data is OSI SAF sea-ice index v2.2.

The ***slower freeze-up of Arctic sea ice*** is also seen in the time series of the sea-ice extent which at present is the 7th-lowest for this time of year and far below the climatology 1981-2010.

Source: #OSISAF sea-ice index v2.2

The graph shows the daily sea-ice extent for 2023 up until October 15th. In addition, the ice extents for 2012 and 2020 (which were the years with the record-low extent) are shown in blue and yellow, respectively. In the background, the 1981-2010 climatology is shown in grey tones.

Halfway through October 2023, the freeze-up of sea ice is slower (or simply just lower) than normal.

By "normal", is meant the 30-year climatology of the same days in 1981-2010.

Source: #OSISAF sea-ice concentration v3.0

Map showing the Arctic sea-ice concentration averaged over the first 15 days in October 2023. For comparison, the sea-ice extent for the first half of October in the period 1981-2010 is represented by an orange contour. This year shows less ice in the Beaufort Sea and the Russian shelf seas.

Global sea-ice extent ranked by month.

Do you see a pattern for the recent years (=bottom of the figure)? 🧐

Source: #OSISAF sea-ice index v2.2.

Table graphic showing the global sea-ice extent ranked by month over the full record from 1979 to 2023. The recent 8 years stand out with less ice in all months of the year.
Source data is the OSI SAF sea-ice index v2.2.

The whole thread is worth reading, but the discussion below about #SeaIce datasets and #Osisaf is very interesting for those of us who run and/or use #CimateModels for the #Arctic....

https://fediscience.org/@phil_browne/111171140478017189

Antarctic sea-ice extent has started to decrease after an extremely low winter maximum. Let's hope for a really slow decrease at least🤞
Source: #OSISAF

Graph showing daily sea-ice extent in the Antarctic throughout the year. The years 2023, 2014, and 2022 are outlined with black, blue, and yellow lines, respectively.

Today left yesterday (that is Sept 17th) as the "so far" minimum #Arctic #seaice extent for 2023.

A minimum at this stage would result in the sixth-lowest minimum extent on record.

Not record-low, but far lower than most years.

Let's see what tomorrow brings.

Source: #OSISAF

The graph shows the daily Arctic sea-ice extent in August-September 2023, together with the previous minimum extents and their date of occurrence for 1979-2022. 2023 seems to have reached a local minimum extent on September 17th - which, at the present stage would be the 6th-lowest minimum on record for the Arctic sea ice. But this can easily change in the upcoming days.
Data: OSISAF

For a week, September 12th has marked the date with the largest #Antarctic #seaice extent in 2023.
This is absolutely record-low for an Antarctic maximum extent!

This still can change and we hope it will 🤞

Source: #OSISAF Sea Ice Index v2.2

The graph shows the daily Antarctic sea-ice extent in August-September 2023, together with the previous maximum extents and their date of occurrence for 1979-2022. 2023 seems to have reached a local maximum extent on September 12th - which again will be the absolute record-low maximum for the Antarctic sea ice.
Data: OSISAF

Has the #Antarctic #seaice stopped growing in extent this winter?

Source: #OSISAF

Graph shows time series of daily Antarctic sea-ice extent for every year from 1978 to 2023. Each year-line is colored in decadal-grouped colorscales. The line for 2023 is outlined in black and shows significantly lower extent than normal all year.

Negligible differences when calculating latitude in two different ways.

#Random #Art EPSG:6932 #OSISAF

As we approach the annual minimum of #Arctic #seaice extent for 2023, it looks like it will be one of the six lowest on record.

To put it in perspective, the years with lower minimums than this year (in order from lowest to highest) are 2012, 2020, 2007, 2016, and 2019.

Source: #OSISAF Sea Ice Index v2.2

The graph shows the daily sea-ice extent in the Arctic with the following years highlighted: 2023 (5th lowest for this day), and the previous five minimums 2012 (record-low), 2020 (2nd lowest), 2007 (3rd lowest), 2016 (4th lowest), 2019 (5th lowest). In addition, is shown the 1981-2010 in gray tones, and the year 1980 (record-high minimum).
Data source: OSI SAF.

Status of the areal coverage of sea ice in #Arctic:
* 3rd lowest in East Siberian Sea (only 2007 and 2012 were lower).
* All "normal" in Laptev Sea.

The graphs show the daily sea-ice extent of 2023 compared with the 1981-2010 baseline and the previous six years 2017-2022.

Source: #OSISAF

The graph shows the daily sea-ice extent in the East Siberian Sea with the recent seven years, 2017-2023, outlined with each their coloured line. 2023 appears as the lowest in these recent years. Only 2007 and 2012 had less ice extent for this time of year.

The graph shows the daily sea-ice extent in the Laptev Sea with the recent seven years, 2017-2023, outlined with each their coloured line. 2023 appears to follow the 1981-2010 baseline median and is the highest extent in the recent 7 years.

We are approaching the yearly minimum extent of the #Arctic #Seaice.

It seems that we won't reach a record low this year, but the minimum will still be significantly below the 1981-2010 baseline.

Source: #OSISAF

The graph shows the Arctic daily sea-ice extent in 2023, the previous minimum extents, and their date of occurrence for 1979-2022. Also, is shown the daily extent for 1980 and 2012 which were the years of largest and smallest minimum extent, respectively.

No surprise. But still crazy.

#Antarctic #SeaIce extent is low.

This graphic shows the ranking of sea-ice extent by month. Take a look at the last line (representing 2023 and updated including August).

Source: #OSISAF
👉 https://cryo.met.no/en/sea-ice-index-sh

Table figure showing the Antarctic sea-ice extent rank by month for the period since 1979 to 2023. All values for 2023 are very low with most of them being record low.

#Arctic #SeaIce extent was 9th lowest in August (#OSISAF).

With only 2 weeks left of the melt season, we are not heading towards a record minimum this year.

Still, the 📉 trend is clear: since 1978, #satellites recorded an average loss of 70,000 km2 of ice *per year*.

#OSISAF

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