#SeaIce

2 Beiträge2 Beteiligte0 Beiträge heute

Adam Steer...so a paper covering a lot of work I did in Norway is out: <a href="http://dx.doi.org/10.1002/gdj3.70001" rel="nofollow noopener noreferrer" translate="no" target="_blank">http://dx.doi.org/10.1002/gdj3.70001</a>It is an interesting one - done after my contract ended, I was surprised to be included."But you got a free paper!"uh uh. Nope. I'm second author on all my own work....which acknowledges my technical work, and also removes acknowledgement of my strategic research thinking.Anyway, I'm happy it is out now.<a href="https://mapstodon.space/tags/seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a> <a href="https://mapstodon.space/tags/snow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#snow</a> <a href="https://mapstodon.space/tags/arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#arctic</a> <a href="https://mapstodon.space/tags/climateData" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#climateData</a>

Rick ThomanSea ice extent in the Bering Sea increased slightly in the past week but remains below the 1991-2020 median. Bristol Bay remains ice-free. NWS Alaska Region sea ice analysis shows a larger area of moderate concentration ice in the Bering Sea than is typical for mid-March. <a href="https://fediscience.org/@ZLabe" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ZLabe</a> <a href="https://fediscience.org/@Climatologist49" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Climatologist49</a> <a href="https://alaskan.social/tags/akwx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#akwx</a> <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a>

Kees van der LeunOver the whole month of February, average temperatures around the North Pole (80-90 degrees North) were around 12°C above the 1951-1980 average! <a href="https://fediscience.org/@ZLabe/114156999916361917" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://fediscience.org/@ZLabe/114156999916361917</a> <a href="https://mastodon.energy/tags/globalwarming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#globalwarming</a> <a href="https://mastodon.energy/tags/ClimateChange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ClimateChange</a> <a href="https://mastodon.energy/tags/arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#arctic</a> <a href="https://mastodon.energy/tags/seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a>

Rick ThomanSea ice in the Bering Sea continues to slowly increase but remains well below the 1991-2020 median in NSIDC data. Main storm rack in the next week looks to remain along Aleutians and southern Bering Sea so some increases in extent are likely. <a href="https://alaskan.social/tags/akwx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#akwx</a> <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> <a href="https://fediscience.org/@Climatologist49" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Climatologist49</a> <a href="https://fediscience.org/@ZLabe" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ZLabe</a>

Phil BrowneAre you passionate about advancing polar environmental prediction and services? We invite you to apply to join one of the newly formed Task Teams within the <a href="https://fediscience.org/tags/PCAPS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PCAPS</a> project of the <a href="https://fediscience.org/tags/WMO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#WMO</a> World Weather Research Programme. Apply by 31 March 2025.<a href="https://www.wwrp-pcaps.net/open-call-2025" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.wwrp-pcaps.net/open-call-2025</a>I'm currently leading the Task Team on <a href="https://fediscience.org/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> thickness data assimilation - would love to find the people we are missing for the teamThere are lots of tasks teams already - take a look and see if any are relevant to you or those you work with

Thomas LavergneThe irony (for which there was no space in the newspaper) is that this type of <a href="https://fediscience.org/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> monitoring is almost solely based on ageing <a href="https://fediscience.org/tags/US" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#US</a> satellites.<a href="https://fediscience.org/tags/Europe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Europe</a> has many excellent satellites, but exactly the type we need for this type of climate monitoring is not (yet) flying with the European flag on.Should the <a href="https://fediscience.org/tags/US" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#US</a> satellites be shut down, we would go to Japanese or Chinese satellites, while waiting for the European ones to fly.

Thomas LavergneI was interviewed (in Norwegian 😅 ) by newspaper <a href="https://fediscience.org/tags/Aftenposten" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Aftenposten</a> to comment on the <a href="https://masto.ai/@CopernicusECMWF" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@CopernicusECMWF</a> February report that <a href="https://fediscience.org/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> extent is record-low globally (and in the <a href="https://fediscience.org/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a>).I used the opportunity to mention the worrying situation of climate research in the USA, and that we should be glad that <a href="https://fediscience.org/tags/Europe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Europe</a> has a well developed <a href="https://fediscience.org/tags/Climate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Climate</a> Service (C3S) to keep track and inform the world.<a href="https://fediscience.org/tags/norsktut" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#norsktut</a>

CopernicusECMWF❄️ February marked an all-time record low for daily global <a href="https://masto.ai/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> extent: Arctic at 8% below average, Antarctic at 26% below. Get more data insight in the February 2025 Climate Bulletin produced by <a href="https://masto.ai/tags/C3S" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#C3S</a> <a href="https://climate.copernicus.eu/sea-ice-cover-february-2025?utm_source=socialmedia&utm_medium=ma&utm_campaign=sea-ice-cover-february-2025&utm_id=CB-02-2025" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://climate.copernicus.eu/sea-ice-cover-february-2025?utm_source=socialmedia&utm_medium=ma&utm_campaign=sea-ice-cover-february-2025&utm_id=CB-02-2025</a>

Adam SteerPhotographing a helicopter flying over an iceberg using a helicopter flying over an iceberg. Prydz Bay, Antarctica, 2009. <a href="https://pixelfed.social/discover/tags/research?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#research</a> <a href="https://pixelfed.social/discover/tags/calval?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#calval</a> <a href="https://pixelfed.social/discover/tags/seaice?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a> <a href="https://pixelfed.social/discover/tags/Antarctica?src=hash" class="u-url hashtag" rel="nofollow noopener noreferrer" target="_blank">#Antarctica</a>

anlomedad"What previous studies have labelled an ‘AMOC collapse’ is now called ‘no collapse’. It’s essentially a discussion about semantics, not physics. Do you call it an AMOC collapse if a weak and shallow wind-driven overturning persists after the thermohaline part has collapsed? Or not?" <a href="https://www.realclimate.org/index.php/archives/2025/02/how-will-media-report-on-this-new-amoc-study/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.realclimate.org/index.php/archives/2025/02/how-will-media-report-on-this-new-amoc-study/</a>Rahmstorf about the new <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AMOC</a> paper misleadingly titled "Continued Atlantic overturning circulation even under climate extremes" <a href="https://www.nature.com/articles/s41586-024-08544-0" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.nature.com/articles/s41586-024-08544-0</a> Good to know. Now I think that maybe Jochem Marotzke, cli-sci at the Max Planck Institute for Meteorology in Hamburg, also applies semantics when he says that collapse can't occur – and in a new sentence then explains the fact that the Gulf Stream is purely wind-driven and will never shut down. If this is his only argument against "AMOC Collapse", it's a weak one. But I also heard him say something like, that the freshwater input isn't available that's required for making AMOC react like in <a href="https://climatejustice.social/tags/paleoclimate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#paleoclimate</a> . *** We do know how much water comes today from Greenland, from the Alpes and from Canada's remaining glaciers. And compared to what melted during the last deglaciation, it's a tiny amount. But we don't know how much more it rains on the Northern <a href="https://climatejustice.social/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Atlantic</a> ocean compared to pre-Holocene times when it was so much colder up there in the North. We don't even know how much it rains in the AMOC-relevant regions today. Also, ice models for the deglaciation do differ a lot in the AMOC-relevant regions, both for land-bound ice and <a href="https://climatejustice.social/tags/seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a>, if they even bother to model sea ice at all.

anlomedadCool! <a href="https://mastodon.nz/@kevpluck" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@kevpluck</a> has interactive sea ice charts. You can click through the individual years, see a selected date and things. <a href="https://seaice.visuals.earth" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://seaice.visuals.earth</a>His <a href="https://climatejustice.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://climatejustice.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> goes through to February 20 while Zack Labe lags 3days. Comparable years of such low sea ice extent like this year were 2017 and 2018. And we in Germany do recall these years in particular as heading into bone dry summers. A special jetstream blocking in 2018 caused crop loss from heat or drought in all 3 major global bread baskets simultaneously, USA, Europe and Russia.Let's see whether this year's sea ice extent is a harbinger to 2018-like summers and harvests. Oh, but if there is a connection, maybe that's dependent on which basins experienced the record low ice. Basins aren't in Kevin's app. Zack's basins show: this year, it was first the East-Canadian Hudson Bay, and then the Pacific Bering Sea near Alaska. <a href="https://zacklabe.com/wp-content/uploads/2025/02/nsidc_sie_regionals_v2_lines-3.png" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://zacklabe.com/wp-content/uploads/2025/02/nsidc_sie_regionals_v2_lines-3.png</a> And where did the overall low extent originate in February 2018? Data here <a href="https://noaadata.apps.nsidc.org/NOAA/G02135/seaice_analysis/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://noaadata.apps.nsidc.org/NOAA/G02135/seaice_analysis/</a>Charts show sea ice extent km2 daily anomaly over 1991-2020. The 2 Pacific Arctic basins and the European Basins Kara and Barents Sea 2018 and this year were also low-ish in seaice extent through to mid February. Chukchi Sea 2018 started with record lows but recovered later, normal this year. Hudson Bay 2018 was normal, this year started record low but normal since mid January. Baffin Bay 2018 was normal but rather low this year. Greenland Sea 2018 was record low, this year was about normal. Gulf of St Lawrence 2018 was normal but rather low this year.So. Not very similar, this year and 2018. But European and Pacific basins are. I'll try to update it in 4 weeks time.

Rick ThomanSo the 33 days so far this winter with Arctic Sea ice extent at the lowest since 1978-79 got me wondering about when lowest daily occurred through the year. Answer: mostly 2016-2020 except 2012 mid-August to early October and 2010 for a short stretch in late June and early July. Data courtesy NSIDC. <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> <a href="https://fediscience.org/@Climatologist49" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Climatologist49</a> <a href="https://fediscience.org/@ZLabe" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ZLabe</a>

Rick ThomanArctic-wide sea ice extent this season has been at record low levels 33 days (and counting) since December 1. Data from NSIDC. <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/Seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Seaice</a>

HistoPol (#HP) 🏴 🇺🇸 🏴Cc <a href="https://fediscience.org/@rahmstorf" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@rahmstorf</a><a href="https://mastodon.social/tags/ClimateCrisis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ClimateCrisis</a>:+2.7-3.1•C--Our children and grandchildren still alive in 2100 are so f*cked!(1/2)By <a href="https://mastodon.social/tags/bneIntelliNews" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bneIntelliNews</a>"The disappearance of <a href="https://mastodon.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> and the melting of the <a href="https://mastodon.social/tags/permafrost" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#permafrost</a> in northeast <a href="https://mastodon.social/tags/Russia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Russia</a> will lead to unpredictable results. Global <a href="https://mastodon.social/tags/weather" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#weather</a> patterns will be drastically altered, while 👉the melting of the permafrost will release gigatonnes of <a href="https://mastodon.social/tags/CO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CO</a>₂ into the atmosphere almost overnight, that has been locked in the <a href="https://mastodon.social/tags/ice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ice</a>...<a href="https://fediscience.org/@rahmstorf/113979473344269758" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://fediscience.org/@rahmstorf/113979473344269758</a>

Rick ThomanEnd of December age of Arctic sea ice, 40 years apart. Incredible change from an Arctic dominated by old sea ice to the almost total loss of that old, thick ice. Images courtesy NSIDC. <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> <a href="https://fediscience.org/@Climatologist49" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Climatologist49</a> <a href="https://fediscience.org/@ZLabe" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ZLabe</a>

anlomedadAccording to Era5, JFM ice concentration/extent in Greenland sea is on an unusual and steep upward slope since 2021. I wonder whether this has anything to do with the <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AMOC</a>. Does fresher water simply freeze easier. Or is the reduced inflow of water due to decreasing convection making ice form easier🤔Or something happening to the wind that used to push new <a href="https://climatejustice.social/tags/seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a> away from <a href="https://climatejustice.social/tags/Greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Greenland</a>'s coast –  and stopped doing that since 2021. What would be the cause for wind change near GL coast in January to March?🤔 Ah. Of course! <a href="https://climatejustice.social/tags/SuddenStratosphericWarming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SuddenStratosphericWarming</a> changes the wind direction from West-East to East-West! We had several <a href="https://climatejustice.social/tags/SSW" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SSW</a> since 2021. So they were pushing new ice against the coast where it can stick together easily? 🤔AMOC-independent – unless these SSW themselves have something to do with AMOC. But I don't think they do. I think, they occur a) during <a href="https://climatejustice.social/tags/LaNina" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LaNina</a> with b) low sea ice in the Kara sea or Laptev sea (Russian coast). Altho... 🤔🤔🤔 a slowing AMOC is causing a quasi-permanent La Nina state, as per modelling by M. England et al 2022. So in a way, maybe AMOC has gotten slow enough for producing the unusual 3 La Nina winters in a row – and in teamwork with <a href="https://climatejustice.social/tags/climatechange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#climatechange</a> causing low sea ice in Kara or Laptev sea – produced the unusual frequency of SSW – who caused sea ice on Greenland's coast to stick easily during January-March 2021-2024. Could be AMOC related after all. 🤔 😁

Rick Thoman2025 starts off with sea ice extent in the Bering Sea well below the 1991-2020 median, and is the lowest for January 4 since 2020. Persistent northeast winds pushing the ice toward St. Matthew Island, but ongoing mild weather keeping much of any ice from forming in Bristol Bay beyond some small protected areas. <a href="https://alaskan.social/tags/akwx" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#akwx</a> <a href="https://alaskan.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> <a href="https://alaskan.social/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> <a href="https://fediscience.org/@Climatologist49" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@Climatologist49</a> <a href="https://fediscience.org/@ZLabe" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ZLabe</a>

anlomedad<a href="https://fediscience.org/@DrEvanGowan" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@DrEvanGowan</a> The introduction speaks of organic material in <a href="https://climatejustice.social/tags/seaice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#seaice</a> originating from the Siberian coast that got squeezed toward the central <a href="https://climatejustice.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> ice by the wind-driven Trans Polar Drift. But Siberia wasn't part of the Eurasian ice sheet, it was ice free during the last glacial. (Which surprises me bigly! ) No wonder then, that its coast, and further out, also wasn't covered in sea ice year round. And therefore, ice fields drifting toward the Arctic centre containing organic material from Siberia's coast is not a surprise. May be, there's a process that cuts off the bottom layer of the inflowing ice once it encounters a more massive top ice field. And the bottom layer then keeps the strength of the push for a while longer. Thus, transporting its organic content further toward the centre?<a href="https://climatejustice.social/tags/paleoclimate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#paleoclimate</a>

Dr. Evan J. GowanSingh et al investigate biomarkers in Arctic Ocean sediment cores, and conclude that drifting sea ice continued to exist during Marine Isotope Stages 2 and 3. There was no Arctic Ocean ice shelf during this time. <a href="https://fediscience.org/tags/Paleoclimate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Paleoclimate</a> <a href="https://fediscience.org/tags/ArcticOcean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ArcticOcean</a> <a href="https://fediscience.org/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> <a href="https://doi.org/10.1016/j.orggeochem.2024.104920" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://doi.org/10.1016/j.orggeochem.2024.104920</a>

Thomas LavergneThere is now less <a href="https://fediscience.org/tags/SeaIce" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SeaIce</a> in the <a href="https://fediscience.org/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Arctic</a> than we ever recorded in mid December.And we measure since the 1970s.<a href="https://fediscience.org/tags/climateChange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#climateChange</a> <a href="https://mastodon.social/@osi_saf" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@osi_saf</a> <a href="https://masto.ai/@CopernicusECMWF" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@CopernicusECMWF</a>

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