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#sea-ice — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #sea-ice, aggregated by home.social.

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  1. In May 2026, the #SeaIce global extent was 6.9% below 1991-2020 mean. Since the beginning of records (1978):
    - #Arctic, 4th lowest monthly mean, with 4.4% less extent than normal (-575,397km²)
    - #Antarctic, 7th lowest monthly mean, with 8.7% less extent than normal (-923,279km²)

    for more: osi-saf.eumetsat.int/sea-ice-i

    #ClimateChange #OSISAF @eumetsat

  2. In May 2026, the #SeaIce global extent was 6.9% below 1991-2020 mean. Since the beginning of records (1978):
    - #Arctic, 4th lowest monthly mean, with 4.4% less extent than normal (-575,397km²)
    - #Antarctic, 7th lowest monthly mean, with 8.7% less extent than normal (-923,279km²)

    for more: osi-saf.eumetsat.int/sea-ice-i

    #ClimateChange #OSISAF @eumetsat

  3. Linxin and Marcus represent our group this week at the ICCWG workshop in #Copenhagen. It's a pleasure to interact with so many international sea ice researchers in one place, sharing experience. Great workshop so far – Shoutout to DMI for organizing! #seaice

  4. Linxin and Marcus represent our group this week at the ICCWG workshop in #Copenhagen. It's a pleasure to interact with so many international sea ice researchers in one place, sharing experience. Great workshop so far – Shoutout to DMI for organizing! #seaice

  5. #SeaIce loss in the #Arctic has triggered a critical #TippingPoint that's destroying the food chain

    Story by Sascha Pare, June 8, 2026

    "The Arctic Ocean has crossed a tipping point that is wreaking havoc on the region's food chain, with potentially dire consequences for commercial fishing and the ocean's capacity to soak up carbon, a new study reports.

    "Scientists found that vast areas of melting sea ice in the Arctic are leading to a significant reduction in nitrate, a key nutrient that forms the base of the marine food web and thus underpins important regional fisheries. As the ice disappears, more light hits the water's surface, promoting the growth of microscopic, plant-like organisms called phytoplankton. When phytoplankton die, their cells sink to the seafloor and are decomposed by nitrate- and oxygen-consuming bacteria.

    "The new study, published May 28 in the journal Communications Earth & Environment, found that the bacteria are consuming more nitrate than the Arctic ecosystem can withstand.

    "This effect, known as 'denitrification,"' is irreversible under current climate conditions because we have passed a threshold where so much sunlight reaches the ocean that it's supercharging phytoplankton's productivity, said Marta Santos-García, a doctoral student of Arctic marine biogeochemistry at the University of Edinburgh in Scotland and the first author of the study.

    " 'Even if sea ice were to increase temporarily, the Arctic nutrient system responds over much longer timescales,' Santos-García told Live Science in an email. 'Short-term increases in sea ice would be unlikely to rapidly reverse the decline in nitrate inventories, which may take much longer to recover.'

    "Dropping nitrate levels may eventually come back to bite phytoplankton, because these tiny organisms need nitrate to carry out photosynthesis. As a result, the transition to a low-nitrate regime could accelerate #ClimateChange, as nitrate plays an essential role in the ocean's biological pump, which takes #CarbonDioxide from the atmosphere via photosynthesis and locks it away at depth when #phytoplankton and the animals that eat it die.

    " 'With nutrients such as nitrate in limited supply this mechanism cannot work effectively,' Santos-García said.

    "To understand ecosystem changes in the Arctic, the researchers analyzed two decades of data from the Fram Strait, a passage between Greenland and Svalbard, Norway, that is the main gateway through which Arctic waters flow into the Atlantic Ocean. They found a sharp decline in nitrate levels in this region after 2009, which coincided with a dramatic reduction in Arctic sea ice and a gradual shift in phytoplankton communities toward smaller species that can cope with low nutrient levels.

    " 'Shifts towards smaller phytoplankton have already been observed in parts of the Arctic, although these changes have not previously been linked to nitrate losses,' Santos-García said. 'This matters because smaller phytoplankton are generally less efficient at transferring energy up the food web. More of the energy is recycled within microbial communities rather than being passed on to larger zooplankton, fish, seabirds, and marine mammals.'

    "Phytoplankton sit at the very bottom of the marine food chain, so the impacts of nitrate depletion will ripple through the Arctic ecosystem, impacting species at the highest levels. This could also affect fisheries in regions that depend on Arctic nutrient exports, such as the North Atlantic. But pinpointing what will happen in ecosystems downstream of the Arctic Ocean requires more research, Santos-García said.

    "For years, researchers thought the long-term impact of sea ice loss in the Arctic would be an increase in phytoplankton, because more organisms can bathe in sunlight and multiply when the sea ice extent is small. However, the increase in phytoplankton since 2009 has depleted nitrate levels enough to limit future phytoplankton growth.

    "Whereas phytoplankton proliferation used to be limited by how much sunlight reached surface waters, it is now controlled by nitrate levels. Therefore, nitrate must be considered as a key driver of future changes in the Arctic, Santos-García said.

    " 'As nitrate is the nutrient that limits Arctic productivity, understanding these changes is therefore important not only for Arctic communities and ecosystems, but also for improving projections of future climate change,' she said."

    Source:
    msn.com/en-us/weather/topstori

    Archived version:
    archive.ph/E1Dlw

    #ClimateChange #TippingPoint #GlobalWarming #WarmingOceans #ArcticEcosystems #SeaIce #OceansAreLife

  6. #SeaIce loss in the #Arctic has triggered a critical #TippingPoint that's destroying the food chain

    Story by Sascha Pare, June 8, 2026

    "The Arctic Ocean has crossed a tipping point that is wreaking havoc on the region's food chain, with potentially dire consequences for commercial fishing and the ocean's capacity to soak up carbon, a new study reports.

    "Scientists found that vast areas of melting sea ice in the Arctic are leading to a significant reduction in nitrate, a key nutrient that forms the base of the marine food web and thus underpins important regional fisheries. As the ice disappears, more light hits the water's surface, promoting the growth of microscopic, plant-like organisms called phytoplankton. When phytoplankton die, their cells sink to the seafloor and are decomposed by nitrate- and oxygen-consuming bacteria.

    "The new study, published May 28 in the journal Communications Earth & Environment, found that the bacteria are consuming more nitrate than the Arctic ecosystem can withstand.

    "This effect, known as 'denitrification,"' is irreversible under current climate conditions because we have passed a threshold where so much sunlight reaches the ocean that it's supercharging phytoplankton's productivity, said Marta Santos-García, a doctoral student of Arctic marine biogeochemistry at the University of Edinburgh in Scotland and the first author of the study.

    " 'Even if sea ice were to increase temporarily, the Arctic nutrient system responds over much longer timescales,' Santos-García told Live Science in an email. 'Short-term increases in sea ice would be unlikely to rapidly reverse the decline in nitrate inventories, which may take much longer to recover.'

    "Dropping nitrate levels may eventually come back to bite phytoplankton, because these tiny organisms need nitrate to carry out photosynthesis. As a result, the transition to a low-nitrate regime could accelerate #ClimateChange, as nitrate plays an essential role in the ocean's biological pump, which takes #CarbonDioxide from the atmosphere via photosynthesis and locks it away at depth when #phytoplankton and the animals that eat it die.

    " 'With nutrients such as nitrate in limited supply this mechanism cannot work effectively,' Santos-García said.

    "To understand ecosystem changes in the Arctic, the researchers analyzed two decades of data from the Fram Strait, a passage between Greenland and Svalbard, Norway, that is the main gateway through which Arctic waters flow into the Atlantic Ocean. They found a sharp decline in nitrate levels in this region after 2009, which coincided with a dramatic reduction in Arctic sea ice and a gradual shift in phytoplankton communities toward smaller species that can cope with low nutrient levels.

    " 'Shifts towards smaller phytoplankton have already been observed in parts of the Arctic, although these changes have not previously been linked to nitrate losses,' Santos-García said. 'This matters because smaller phytoplankton are generally less efficient at transferring energy up the food web. More of the energy is recycled within microbial communities rather than being passed on to larger zooplankton, fish, seabirds, and marine mammals.'

    "Phytoplankton sit at the very bottom of the marine food chain, so the impacts of nitrate depletion will ripple through the Arctic ecosystem, impacting species at the highest levels. This could also affect fisheries in regions that depend on Arctic nutrient exports, such as the North Atlantic. But pinpointing what will happen in ecosystems downstream of the Arctic Ocean requires more research, Santos-García said.

    "For years, researchers thought the long-term impact of sea ice loss in the Arctic would be an increase in phytoplankton, because more organisms can bathe in sunlight and multiply when the sea ice extent is small. However, the increase in phytoplankton since 2009 has depleted nitrate levels enough to limit future phytoplankton growth.

    "Whereas phytoplankton proliferation used to be limited by how much sunlight reached surface waters, it is now controlled by nitrate levels. Therefore, nitrate must be considered as a key driver of future changes in the Arctic, Santos-García said.

    " 'As nitrate is the nutrient that limits Arctic productivity, understanding these changes is therefore important not only for Arctic communities and ecosystems, but also for improving projections of future climate change,' she said."

    Source:
    msn.com/en-us/weather/topstori

    Archived version:
    archive.ph/E1Dlw

    #ClimateChange #TippingPoint #GlobalWarming #WarmingOceans #ArcticEcosystems #SeaIce #OceansAreLife

  7. I am on my way to the 13th edition for the Sea Ice Data Assimilation Workshop, hosted by the Danish Meteorological Institute in Copenhagen. This is one of the most important workshop series for our community, always packed with good talks and posters.

    I'll give a presentation tomorrow morning, focusing on the current status and recent upgrades of the @osi_saf #SeaIce #Climate Data Records. Still need to work on my slides 😅 , with me luck.

    Of course, we will also discuss about the future @CopernicusEU satellites #CIMR and #CRISTAL !

    #conference #SeaIce #satellite

    iicwgda2026copenhagen.wordpres

  8. I am on my way to the 13th edition for the Sea Ice Data Assimilation Workshop, hosted by the Danish Meteorological Institute in Copenhagen. This is one of the most important workshop series for our community, always packed with good talks and posters.

    I'll give a presentation tomorrow morning, focusing on the current status and recent upgrades of the @osi_saf #SeaIce #Climate Data Records. Still need to work on my slides 😅 , with me luck.

    Of course, we will also discuss about the future @CopernicusEU satellites #CIMR and #CRISTAL !

    #conference #SeaIce #satellite

    iicwgda2026copenhagen.wordpres

  9. With a persistent area of open water west of the North Slope coast, sea ice extent in Chukchi Sea is lower than last year at this point in the season and close to the 1991-2020 median in NSIDC data. Ice in southern Chukchi Sea now starting to break-up. There is hardly any high concentration ice left in the Bering Sea. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  10. With a persistent area of open water west of the North Slope coast, sea ice extent in Chukchi Sea is lower than last year at this point in the season and close to the 1991-2020 median in NSIDC data. Ice in southern Chukchi Sea now starting to break-up. There is hardly any high concentration ice left in the Bering Sea. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  11. The sea ice season in the Bering Sea has come to a close, with only a little remanent ice remaining. Based on NSIDC data, the 2025-26 season was 189 days long, which is typical for recent years. The average sea ice season nowadays is about seven weeks shorter compared to the early 1980s. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  12. The sea ice season in the Bering Sea has come to a close, with only a little remanent ice remaining. Based on NSIDC data, the 2025-26 season was 189 days long, which is typical for recent years. The average sea ice season nowadays is about seven weeks shorter compared to the early 1980s. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  13. Work-related: if you are curious about @osi_saf plans to transition their #seaice products from #AMSR2 to #AMSR3 over the summer, please visit osi-saf.eumetsat.int

    In particular this page:
    osi-saf.eumetsat.int/community

    And yes, worth noting that #OSISAF is on Mastodon. Thank you @gwenbras !

  14. Work-related: if you are curious about @osi_saf plans to transition their #seaice products from #AMSR2 to #AMSR3 over the summer, please visit osi-saf.eumetsat.int

    In particular this page:
    osi-saf.eumetsat.int/community

    And yes, worth noting that #OSISAF is on Mastodon. Thank you @gwenbras !

  15. Sea ice is on the way out for the season in the Bering Sea. Increasing areas of moderate concentration ice in the southern Chukchi and large area open water persisting west of the North Slope coast: overall sea ice extent in the Chukchi Sea the lowest for May 30 since 2022. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  16. Sea ice is on the way out for the season in the Bering Sea. Increasing areas of moderate concentration ice in the southern Chukchi and large area open water persisting west of the North Slope coast: overall sea ice extent in the Chukchi Sea the lowest for May 30 since 2022. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  17. Spectacular clear sky satellite image Saturday afternoon of the greater Bering Strait region. Virtually the entire region was cloud-free, providing good look at the remaining sea ice and snow cover. Image courtesy GINA/UAF. @Climatologist49 @Jdnome

    #akwx #Arctic #SeaIce

  18. Spectacular clear sky satellite image Saturday afternoon of the greater Bering Strait region. Virtually the entire region was cloud-free, providing good look at the remaining sea ice and snow cover. Image courtesy GINA/UAF. @Climatologist49 @Jdnome

    #akwx #Arctic #SeaIce

  19. #ZackLabe #DataViz #Arctic #SeaIce

    "...this sandwich is fine, because it just has twelve bugs on it, and our last sandwich had fifteen bugs on it..."

    zacklabe.com/arctic-sea-ice-ex

  20. #ZackLabe #DataViz #Arctic #SeaIce

    "...this sandwich is fine, because it just has twelve bugs on it, and our last sandwich had fifteen bugs on it..."

    zacklabe.com/arctic-sea-ice-ex

  21. Sea ice in the Bering Sea well on the way to meltout. Still small areas of high concentration ice, especially from east of St. Lawrence Island northward through the Alaska side of the Bering Strait. Substantial area in Chukchi Sea west of the North Slope has opened up, and this is the most open water for the date in the Chukchi since 2020. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  22. Sea ice in the Bering Sea well on the way to meltout. Still small areas of high concentration ice, especially from east of St. Lawrence Island northward through the Alaska side of the Bering Strait. Substantial area in Chukchi Sea west of the North Slope has opened up, and this is the most open water for the date in the Chukchi since 2020. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  23. Shorefast ice break-out in front of Nome Wednesday evening well captured by the UAF Sea Ice radar. @Jdnome @Climatologist49

    #akwx #SeaIce #Arctic

  24. Shorefast ice break-out in front of Nome Wednesday evening well captured by the UAF Sea Ice radar. @Jdnome @Climatologist49

    #akwx #SeaIce #Arctic

  25. Sea ice continues to melt away in the Bering Sea and the "swiss cheese" pattern of open water interspersed with areas of high ice concentrations is typical for May. The Bristol Bay ice though is very unusual this late in the Spring. Open water increasing in the Chukchi Sea offshore of Alaska's North Slope but little open water yet in the southern Chukchi. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  26. Sea ice continues to melt away in the Bering Sea and the "swiss cheese" pattern of open water interspersed with areas of high ice concentrations is typical for May. The Bristol Bay ice though is very unusual this late in the Spring. Open water increasing in the Chukchi Sea offshore of Alaska's North Slope but little open water yet in the southern Chukchi. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  27. Jour 12 du #PhotoMai2026 #PhotoMay2026
    Thème : Carte

    Carte des glaces du 18 août 2008 le long de la côte du Groenland nord-est (à gauche, c'est plus évident sur les cartes en couleur actuelles) entre 75° et 80° nord, en noir et blanc, au-dessus de la carte marine du Scoresbysund. Sur la carte des glaces on peut voir quelques relevés de la route, suivie par le MV Grigoriy Mikheev.

    La dernière carte des glaces du secteur est visible à ocean.dmi.dk/arctic/images/MOD
    Mon carnet de voyage à groenland-nordest.en-photo.fr/

    #carte #map #Groenland #Greenland #banquise #SeaIce

  28. Jour 12 du #PhotoMai2026 #PhotoMay2026
    Thème : Carte

    Carte des glaces du 18 août 2008 le long de la côte du Groenland nord-est (à gauche, c'est plus évident sur les cartes en couleur actuelles) entre 75° et 80° nord, en noir et blanc, au-dessus de la carte marine du Scoresbysund. Sur la carte des glaces on peut voir quelques relevés de la route, suivie par le MV Grigoriy Mikheev.

    La dernière carte des glaces du secteur est visible à ocean.dmi.dk/arctic/images/MOD
    Mon carnet de voyage à groenland-nordest.en-photo.fr/

    #carte #map #Groenland #Greenland #banquise #SeaIce

  29. Sea ice melt continues apace in the Bering Sea with the total extent well below the 1991-2020 median. The most unusual feature is the persisting ice in upper Bristol Bay. This is the latest in the Spring with sea ice in Bristol Bay since May 2012. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  30. Sea ice melt continues apace in the Bering Sea with the total extent well below the 1991-2020 median. The most unusual feature is the persisting ice in upper Bristol Bay. This is the latest in the Spring with sea ice in Bristol Bay since May 2012. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  31. Lovely sunny Thursday at Nome (26F, -3.3C at Noon AKDT), with the Nome National Forest hanging tough on the shorefast sea ice. Nome sea ice radar shows the shorefast ice is currently stable out to about 3.5 miles from town. #akwx #SeaIce @Jdnome

  32. Lovely sunny Thursday at Nome (26F, -3.3C at Noon AKDT), with the Nome National Forest hanging tough on the shorefast sea ice. Nome sea ice radar shows the shorefast ice is currently stable out to about 3.5 miles from town. #akwx #SeaIce @Jdnome

  33. The coming #ElNiño could be the strongest in over a century.

    Warming water in part of the #PacificOcean is raising the odds for the biggest El Niño on record. The #weather pattern could fully form by July.

    It could lead to record high global #temperatures & #food shortages, & shift patterns of #droughts, #floods, humidity & #SeaIce across the planet.

    #ExtremeWeather #Climate #ClimateChange #ClimateCrisis
    washingtonpost.com/weather/202

  34. The coming #ElNiño could be the strongest in over a century.

    Warming water in part of the #PacificOcean is raising the odds for the biggest El Niño on record. The #weather pattern could fully form by July.

    It could lead to record high global #temperatures & #food shortages, & shift patterns of #droughts, #floods, humidity & #SeaIce across the planet.

    #ExtremeWeather #Climate #ClimateChange #ClimateCrisis
    washingtonpost.com/weather/202

  35. Arctic Winter Ice Extent Hits Historic Low

    Arctic sea ice maximum in 2026 tied the 2025 record low. This affects polar bears and seals and means more summer melt.

    #ArcticIce, #ClimateChange, #SeaIce, #PolarBears, #GlobalWarming

    newsletter.tf/arctic-winter-ic

  36. Arctic Winter Ice Extent Hits Historic Low

    Arctic sea ice maximum in 2026 tied the 2025 record low. This affects polar bears and seals and means more summer melt.

    #ArcticIce, #ClimateChange, #SeaIce, #PolarBears, #GlobalWarming

    newsletter.tf/arctic-winter-ic

  37. Sea ice continues to melt rapidly in the Bering Sea and extent is now below the 1991-2020 median. Small remanent of the extensive ice in the southeast Bering in late March remains in Bristol Bay. The open water area along the North Slope Chukchi Sea coast is normal this time of year. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  38. Sea ice continues to melt rapidly in the Bering Sea and extent is now below the 1991-2020 median. Small remanent of the extensive ice in the southeast Bering in late March remains in Bristol Bay. The open water area along the North Slope Chukchi Sea coast is normal this time of year. @Climatologist49 @ZLabe

    #akwx #Arctic #SeaIce

  39. We are excited to announce the official release of two Sea-Ice climate products on next Monday (04/05):
    - Our Global Sea-Ice Concentration Interim Climate Data Record (AMSR) osi-saf.eumetsat.int/products/
    This product, together with the AMSR Climate Data Record it complements will provide a coverage of #SeaIce concentration, retrieved from #AMSR sensors from 01/06/2002 to present.
    More info on osi-saf.eumetsat.int/community
    👇 1/3