#seaice — Public Fediverse posts

9 min ago @ 2103 Western Ave, Seattle, WA 98121, USA

https://iceout.org/en/reportInfo/144187
#SeaICE #SeattleICE #ICE #Seattle

Sea salt may have made Snowball Earth far colder than previously thought

Salt crystals left behind on extremely cold tropical sea ice may …
#NewsBeep #News #Science #albedofeedback #ancientEarth #AU #Australia #Climatechange #climatemodeling #Cryogenian #globalglaciation #GreenGoodNews #hydrohalite #Marinoanglaciation #Neoproterozoic #NewDiscoveries #PlanetaryScience #research #saltalbedo #seaice #seasalt #SnowballEarth #Sturtianglaciation #UniversityofTromsø
https://www.newsbeep.com/au/882608/

9 min ago @ 5980 1st Ave S, Seattle, WA 98108, USA

https://iceout.org/en/reportInfo/144176
#SeaICE #SeattleICE #ICE #Seattle

Sea ice in the Beaufort and Chukchi Seas continues melt, with the combined extent slightly higher than last year but well below the 1991-2020 median in NSIDC data. The higher concentration sea ice north of the northeast Alaska coast is an area of thicker multi-year ice that moved southwest in the spring from the Canadian High Arctic in the ocean currents. @Climatologist49 @ZLabe

#akwx #Arctic #SeaIce

"all this ICE got me changing my climate"

Small seaice bot progress update, mostly done with downloading and ingesting the entire US as vector shapefiles, converting to GeoJSON and a touch more work to index into the db.

Pumping BigXThe Plug while we crawl up ICE's ass....

@seaice_usa @seaice

#BigXThaPlug #TracksToHackTo #Climate #ICEWatch #devlog #seaice

5 min ago @ Pine Street, Seattle, WA, USA

https://iceout.org/en/reportInfo/144046
#SeaICE #SeattleICE #ICE #Seattle

24 min ago @ Downtown Seattle YMCA, 4th Avenue, Seattle, WA, USA

https://iceout.org/en/reportInfo/143985
#SeaICE #SeattleICE #ICE #Seattle

The U.S. National Ice Center's Northwest Passage (connecting the northwest Atlantic to the Pacific Ocean) sea ice analysis product was last updated three weeks ago. This is not helpful.
@Climatologist49 @ZLabe

https://usicecenter.gov/Products/ArcticPeriodic

#SeaIce #Arctic

Mapping Snow On Northern Winter Roads - A Dual-Frequency Polarimetric Radar Approach For Snow Characterization Over Land, Lake And Sea Ice
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https://doi.org/10.5194/tc-20-4367-2026 <-- shared paper
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H/T @Monojit Saha | Geospatial Analysis | Remote Sensing | Satellite Altimetry | Cryosphere
“Winter roads are essential transportation links for many remote northern communities, but their safety and reliability depend strongly on snow conditions and ice growth. In this study [link above], [the authors] evaluated a fully polarimetric, dual-frequency Ku- and Ka-band radar approach for retrieving snow depth across landfast sea ice, lake ice, and tundra.
Using field measurements near Churchill, Manitoba, and Resolute Bay, Nunavut [Canada], [they] found that the approach produced snow-depth retrieval bias and error within 3 cm over landfast ice, with encouraging Ku-band performance over frozen ground as well. [They] also developed an interface-detection approach for lake ice that can retrieve both snow depth and ice thickness - a promising direction for characterizing conditions relevant to winter-road planning and safety…”
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“Winter roads are lifelines for remote northern communities. Built over land, lakes, rivers, and sea ice, these travel routes are increasingly vulnerable to warming temperatures and variable precipitation. To ensure safety and adapt to these changes, operators require high-resolution monitoring of snow depth across these diverse surfaces, as natural snow accumulation dictates ice growth rates, route viability and road stability. This study extends our polarimetric radar method, previously demonstrated on pack ice, to landfast sea ice, tundra, and frozen lakes and assesses how well we can retrieve snow depth over these surfaces. Results indicate consistency with earlier sea ice analyses, maintaining a mean snow depth retrieval bias and error within 3 cm over the landfast ice. Promising performance is also found over frozen ground using Ku-band (mean biases less than 6 cm). To address the specific challenge of lake ice, which includes strong returns from the ice/water interface, we present a new interface-detection technique that simultaneously retrieves snow depth and ice thickness. While current validation focuses on undisturbed snow, this approach could provide a path forward for characterizing the cryospheric environment in a way that can directly support the optimization of winter roads…”
#Cryosphere #RemoteSensing #Snow #SeaIce #LakeIce #WinterRoads #characterisation #ArcticResearch #EarthObservation #PolarScience #maintainence #ploughing #winter #roads #transportation #northern #communities #mines #FirstNation #canada #remotesensing #polarimetric #radar #snowdepth #ice #landfastice #iceroad #tundra #Churchill #Manitoba #ResoluteBay #Nunavut #monitoring #planning #safety #trucking #freight

“Frozen Waves”

Photographer Jan Erik Waider is a master of capturing incredible landscape imagery. In these videos, he uses a drone to film waves in the Baltic Sea gently undulating polygonal slabs of ice on the ocean surface. The interplay of light, color, and motion looks almost surreal, but nature is better than we credit at making imagery too good to look away from. (Video and image credit: J. Waider/NorthLandscapes; via Colossal)

https://www.youtube.com/watch?v=-JQaZaUSS0E

Aging Salty Ice

When ice forms in salty water, it starts out mushy and porous. Salt does not freeze neatly into ice’s crystalline structure, so the forming ice has pores and gaps where salty brine gathers. As the ice ages, more brine is pushed out and gradually convects downward, due to its greater density. Over time, this makes the ice layer thinner but more solid, with fewer pores. You can see a timelapse of the process in a laboratory experiment below. (Image credit: sea ice – C. Matias, experiment – F. Wang et al.; research credit: F. Wang et al.)

‘Two incredible extreme events’: #Antarctic #seaice on cusp of record winter low for second year running
Last year Antartica’s #sea #ice was 1.6m sq km below average – the size of Britain, France, Germany and Spain combined. This week it had even less than that
https://www.theguardian.com/world/article/2024/sep/10/two-incredible-extreme-events-antarctic-sea-ice-on-cusp-of-record-winter-low-for-second-year-running #climate #climatechange #cliamtecrisis