Lmst

This [deep #seafloor #mining] is being planned on some of the least resilient #ecosystems on the planet. It would have #catastrophic #biological consequences." - Douglas McCauley, professor of #oceanscience at the University of California Santa Barbara

Odd question: Which #water mass is the #seafloor interacting with? It's very much a "depends where". Just around Europe and North Africa, it can be one of over twenty different water masses.
https://www.tandfonline.com/doi/full/10.1080/17445647.2025.2477040

New. Map of the seafloor water masses. Atlantic/Baltic Sea domain: (i) Deep water masses, North Atlantic Deep Water (NADW), Labrador Sea Water (LSW), Iceland Scotland Overflow Water (ISOW), and Denmark Strait Overflow Water (DSOW) lower NADW (lNADW) and upper NADW (uNADW); (ii) Upper Slope and Continental shelf water masses: North Atlantic Central Water (NACW), Jutland coastal water (JCW), Norwegian Coastal Water (NCW), North Icelandic Irminger Current (NIIC), Mediterranean Overflow Water (MOW), deep water mases of the Southern North Sea water (deep SNSW). Mediterranean/Black Sea domain: Western Mediterranean Deep Water (WMDW), Eastern Mediterranean Deep Water (EMDW), Levantine Intermediate Water (LIW), Atlantic Water (AW), Adriatic Deep Water (ADW), Cretan Deep Water (CDW). Black Sea: Black Sea Deep Water (BSDW), Cold Intermediate Water (CIW). White dot lines show location of the profiles shown in Figure 5 of the paper.

Oh what could possibly go wrong?

#seafloor #Mining #ocean #EnvironmentalJustice

https://www.nytimes.com/2025/04/25/climate/seafloor-mining-science.html?unlocked_article_code=1.CU8.KfgI.OsY0xIwspW3t&smid=url-share

On average, there is less than a kilometer of sedimentary material between the #seafloor and the magmatic #substrate. Unless you're on a continental margin, then it's several kilometers.

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008115

The maps of related to this study are on the NOAA servers, but for some reason, they are going to be removed soon. If this is relevant for you, back it up now.

Map showing total sediment thickness in kilometers. Regions inside red dashed polygons indicate sediment thickness values taken from the Laske et al. (2013) grid with an original coarser grid node spacing (1°) than the other used grids.

SciTech Chronicles. . . . . . . . .April 1st, 2025

https://bit.ly/stc040125

#bioproducts #waste #polyhydroxyalkanoates #3D-Printing #Bellingshausen #A-84 #seafloor #sediment #PEDOT:PSS #crosslinker #ions #bioelectronic #polyfluoroalkyl #graphene #FJH #GAC #renewables #topology #forecasting #spatio-temporal

"The human world, it's a mess ... life under the sea is better than anything they've got up there"

Something for kids: Under the sea by Disney :)
https://www.youtube.com/watch?v=GC_mV1IpjWA

#photo #photography #underseas #seafloor #aquarium #anemones #UnderTheSea

The floor of a sea aquarium full of white anemones, to the left also a light pink one. Between them countless tiny orange-white striped anemone fish swimming around.

When the ice broke away and scientists got a good look at the Antarctic Ocean floor, they were surprised to see abundant life. https://www.cbc.ca/radio/asithappens/antarctic-ice-expedition-1.7490216 (Remember: Life finds a way!) #antarctic #antarctica #seafloor

20-Mar-2025
Thriving #Antarctic #ecosystems found in wake of recently detached #iceberg
Scientists explore a #seafloor area newly exposed by iceberg A-84; discover vibrant communities of ancient #sponges and #corals.

https://www.eurekalert.org/news-releases/1077611 #science #ecology #environment

New Map Of Landscape Beneath Antarctica Unveiled
--
https://phys.org/news/2025-03-landscape-beneath-antarctica-unveiled.html <-- shared technical article
--
https://doi.org/10.1038/s41597-025-04672-y <-- shared paper
--

#GIS #spatial #mapping #Bedmap3 #icebed #surface #thickness #gridded #datasets #Antarctica #raster #model #modeling #landscape #elevation #icesheet #survey #remotesensing #earthobservation #climatechange #warming #climate #melt #melting #seafloor #subglacial #geophysical #survey #topography #geology #bathymetry #topobathy #BritishAntarcticSurvey
@BritishAntarcticSurvey

schematic / flow chart - Schematic showing the Bedmp3 source datasets (white boxes) combining to make intermediate products (blue boxes) and ultimately the final set of grids (orange boxes) and their uncertainties (yellow boxes). Note that the surface grid has a uniform estimated uncertainty (Section Uncertainty estimates).

maps - Bedmap3 grids of (a) bed topography and (b) surface elevation, in metres above sea level (g104c geoid), and (c) ice thickness in metres. Locations labelled in (b) are referred to in the text

The BedMachine v3 bed has some subjective advantages over Bedmap3 where glacier flow is relatively fast, but survey data are sparse. (a) Surface flow speed43; (b) BedMachine v3 bed topography; (c) Bedmap3 bed topography, both overlaid on shaded relief and with survey data shown as grey lines. The black dotted line highlights a trough under slow-flowing ice that is more smoothly continuous in Bedmap3. The white oval highlights the trough of a relatively fast-flowing ice stream that in BedMachine v3 is more smoothly streamlined and subjectively more realistic than in Bedmap3, given the typical streamlined form of deglaciated ice stream landscapes. An objective test of bed accuracy in this area requires more survey data.

maps - The Bedmap3 survey dataset allows us to calibrate the more continuous and extensive freeboard-based ice shelf thickness grid. (a) Pointwise ice thickness biases between 119,000 survey measurements and the freeboard-derived ice thickness grid47 on the Ross Ice Shelf, showing coherent patterns of bias; (b) these pointwise offsets median-filtered over a 20 km radius; (c) spline-interpolated calibration grid of the filtered offsets in (b); (d) bias-corrected version of the freeboard-derived ice thickness grid after subtraction of the calibration grid in (c).

We got a new paper (Led by Ole Sørensen) out! Outlining a new #seafloor #habitat management workflow, integrating the awesome capabilities (cm-scale resolution) synthetic aperture #sonar now brings to #ecological mapping of #marine biomes.
https://zslpublications.onlinelibrary.wiley.com/doi/full/10.1002/rse2.70002

A high-resolution synthetic aperture sonar (SAS) backscatter image (top), with field of view (FOV) of the representative images from a closed-circuit dive at a 33 m deep rock-sand interface in Bustan HaGalil Ridge. The red line represents the transect line seen in image A.

#GoldenKelp, Ecklonia Radiata & #climatecrisis
1 hectare of kelp sequestering up to 18 tonnes of CO2 while producing oxygen through photosynthesis by converting sunlight, carbon dioxide, and nutrients into sugars for growth along #GreatSouthernReef 8,000km around NSW/Vic/SA/WA southern coastline,

#Underwaterforests vs #seaurchins
https://www.abc.net.au/news/2025-01-11/kelp-forests-sea-urchins-port-phillip-bay/104740450

“Helping the Bay” (?)
https://www.anl.com.au/news/2591/anl-launches-the-k-helping-the-bay-initiative-helping-to-restore-golden-kelp-forests-in-port-phillip-bay?

#ecology #marineenvironment #Kelp #Naarm #revegetation #rewilding #reeflife #seafloor

Looking for a #postdoc for 2026? Interested in the interfaces between #sedimentology and #geochemistry? #Biology and the #seafloor? #ClimateChange at #sea? Come join my new group!
I'm looking for candidates to apply with us for Marie Sklodowska Curie fellowships on a range of topics.

Looking for your next postdoc? Come apply with us for a Marie Sklodowska Curie fellowship. Our work ranges from marine chemistry, environmental reconstruction, climate change in the marine environment, diagenesis, sediment-water interactions and more.
We are looking for excellent candidates — geologists, sedimentologist, geochemists, modellers, computational geoscientists and others in the earth and marine sciences space — interested in working on (but not limited to) the following research themes:
- Sediment-water interactions.
- Low temperature carbonate mineral reactions/interactions.
- Seafloor fluxes.
- Role of waves and storms in sediment distribution.
- Abiotic control factors on benthic communities.
- Long term fidelity of environmental signals.
An ideal candidate should be interested in working in a highly multi-disciplinary environment, eager to share their knowledge and learn.

Are you interested?
Please send a synopsis of the project you wish to work on, and a copy of your CV (including list of publications), to obialik@ocean.org.il by June 30th 2025 the latest. The deadline for proposal submission is mid-September 2025.

Does anyone have a good reference for how #echinoderms resurface and/or recognize the #seafloor in their #habitat? It's something I've observed, but I can't seem to find any reference describing or quantifying it.
(I've looked at the bioturbation literature; it's not what I'm looking for)

Echinoderm tracks breaking apart patches of rhodoliths offshore Malta.
Source: https://link.springer.com/article/10.1007/s10347-024-00690-1

19-Dec-2024
Newly published study reveals diversity of novel #HydrothermalVents styles on the #Arctic Ocean floor
Research offers potential understanding of habitability on ocean worlds in the outer solar system

https://www.eurekalert.org/news-releases/1068825 #science #astrobiology #ecology #seafloor

A shout out to my former student Muhedeen Lawal for the first paper out of their postdoc, taking the methods he developed in his PhD and applying them to understand how gas rises through the #sediment to the #seafloor in the Gulf of Mexico.
https://doi.org/10.1016/j.marpetgeo.2024.107270

Satellites Reveal Stunningly Detailed Maps Of Earth's Seafloors
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https://www.livescience.com/planet-earth/rivers-oceans/satellites-reveal-stunningly-detailed-maps-of-earths-seafloors <-- shared technical / media article
--
https://swot.jpl.nasa.gov/ <-- SWOT home page
--
https://doi.org/10.1126/science.ads4472 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #satellite #SWOT #NASA #marine #global #tectonics #geology #underwater #structuralgeology #currents #ocean #oceansurface #gravity #hills #volcanoes #tectonicplates #abyssal #ridges #geology #model #seamounts #continentalmargins #oceancurrents #nutrienttransport #seawater #geologichistory #altimetry #gravimetry #VGG #topography #radaraltimetry #global #seafloor #marine

Global map of SWOT VGG showing the Atlantic Ocean, the Indian Ocean, and the Pacific Ocean

maps - seafloor topography and VGG near the EPR, demonstrating that the smallest seamount resolvable by SWOT is about 450m in height

maps - abyssal hills revealed by SWOT-derived global VGG

maps - comparison between VGG derived from 1 year of SWOT data and that from 30 years of nadir altimetry at continental margins

Inktober 2024:
29. Navigator

#inktober #inktober2024 #inktobernavigator #angelodonnermann #navigator #meer #sea #fish #fische #skull #meeresgrund #seafloor #comicart #zeichnung #drawing #illustration

Inktober 2024:
29. Navigator

#inktober #inktober2024 #inktobernavigator #angelodonnermann #navigator #meer #sea #fish #fische #skull #meeresgrund #seafloor #comicart #zeichnung #drawing #illustration

24-Oct-2024
When we disturb the seabed, we get more #carbonDioxide and increase the risk of oxygen depletion
A new study from Aarhus University shows that disturbances of the seabed from #trawling equipment and #dredging can lead to a series of negative consequences for both the marine #environment and the global ecosystem.

https://www.eurekalert.org/news-releases/1062523 #science #ClimateCatastrophe #SeaFloor #ocean #MarineBiology

This #Fish Evolved Legs That It Uses to Taste Stuff on #Seafloor
#Searobin has fascinated scientists for decades. It has body of a fish, wings of a bird and legs of a crab. When researchers analyzed molecules responsible for the ability to find food in sand, they found sea robin’s shovel-shaped legs were covered in little protrusions similar to the papillae on your tongue. It’s as if they #taste their prey from above the sand before digging it up.
https://www.nytimes.com/2024/09/26/science/sea-robins-legs-tasting-fish.html
https://archive.ph/AJ1Pd

#seafloor

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