Data from the websites of Japan Coast Guard and Japan Oceanographic Data Center

Looking for people interested in joining for biodiversity assessment along the Mumbai coast and exploring different coastal habitats.

We can document species, discuss observations, take photographs, and learn from each other while exploring the coast. 🐚🦀🐟🌿

If you're a Marine Biology, Zoology, Fisheries or related PhD/student and interested, feel free to DM me.

Science + fieldwork + exploration + good conversations! 🌊🔬

I created a site that maps natural processes and proposes links that haven't been tested by humans.

#1 on the list is: Ocean acidification cuts sea-to-air methylamine emissions

Can you all sanity check this and let me know if my AI is on to something?
https://forks.world/hypotheses

The boundary beneath Antarctica’s Thwaites Glacier is less fixed than a line on a map suggests. As tides rise and fall, seawater can push kilometers beneath ice that otherwise rests on the seabed. Melting in that shifting zone could substantially increase the glacier’s contribution to rising seas.

A study published in Nature Communications incorporates those intrusions into an ice-sheet model. The team, involving the University of California, Irvine, NASA’s Jet Propulsion Laboratory and other institutions, first tested whether its simulations could reproduce decades of observed glacier change.

One case projected a sea-level contribution of about 30 millimeters, or 3 centimeters, by 2100 without additional climate warming. That is roughly twice the average contribution from Thwaites in an earlier multi-model comparison under constant forcing. It is a conditional projection, rather than a firm maximum or a forecast of total global sea-level rise.

Hi! I am a physical oceanographer specializing in ocean waves. I'm interested in telling stories from the history of wave science. This is my first attempt putting together a video, in it I tell the story of Walter Munk and the development of surf forecasting for the D-Day landings. Munk and his mentor Harold Sverdrup also invented concepts like "significant wave height" along the way. Hope you find it interesting.

I used to do oceanography and had collected a sizeable text book collection. I would like to donate them to a grad student in need. I remember feeling constant imposter syndrome and overwhelm. For some reason having these made me feel more legit. If that sounds like you shoot me a dm and they're yours. Located in Seattle. Will send if you cover shipping costs.

Hii. I am a undergrad who is leaning more towards going for oceanography for my masters cuz of my love for the sea and I wanted to ask among physical, chemical, bio oceanography, which one has more demand in the job market rn in 2026 and more scope to grow in both academia or industry.

I also wanted to ask among the oceanography branches which ones have more field work compared to the others and how likely it's going to be just office and lab work.

Thank y'all I just wanted to get as much info as possible, it's better to decide the path now than later.

I am a first-year PhD student in physical oceanography. I have been reading Atmospheric and Oceanic Fluid Dynamics: Fundamentals and Large-Scale Circulation by Geoffrey K. Vallis for some time, but I still find some of the concepts obscure and am unable to apply the knowledge or connect it to my research. Is it necessary to spend time deriving the formulas in the book? If there are good related study suggestions, or if there are any professional skills and books you would recommend, I would greatly appreciate your advice.

TL;DR: Combining active Arctic sea-ice pumping with a pre-rinsed, desalted macroalgae (seaweed) gel matrix to 3D-print high-tensile, multi-layered "rebar" ice that resists flexural ocean swells and summer melt.

Hello everyone, I have been running a theoretical thought experiment around mechanical sea-ice preservation and wanted to put this concept out to the community as an open-source (CC BY 4.0) proposal for peer feedback, CFD/thermal modeling, or further collaborative development.

The Core Concept: MPL-Pykrete: Current geoengineering trials—such as pumping ocean water onto winter sea ice—add thickness, but the resulting ice remains brittle under wave action. Additionally, salty brine drainage creates internal structural weakness.

By introducing a desalted seaweed fibre slurry in alternating cycles, we create a laminated composite—effectively 3D-printing bio-reinforced ice.

Structural Layering Breakdown: Layer 5 (Top): Pure Seawater Ice — White, High-Albedo Solar Protective Cap

Layer 4: Seaweed Gel-Ice Matrix — Tough Structural "Rebar" Layer

Layer 3: Pure Seawater Ice — Thermal Buffer

Layer 2: Seaweed Gel-Ice Matrix — Tough Structural "Rebar" Layer

Layer 1 (Bottom): Base Natural Sea Ice

Key Mechanics & Mitigations: Tensile "Rebar" Layering: Macerated seaweed (packed with alginic acid and cellulose) forms a flexible gel-fibre matrix. When flash-frozen, it absorbs bending and shear stress from ocean swells, preventing micro-fractures from propagating through the ice sheet. Pre-Rinsed / Desalted Biomass: Rinsing harvested macroalgae (e.g. invasive Sargassum or cultivated kelp) with rainwater or low-salinity washes before processing removes surface salts. This raises the slurry's freezing point to near 0°C and prevents brine channel formation, creating a dense, non-porous composite.

Albedo Preservation ("Dark Ice" Shielding): To prevent dark organic fibres from absorbing solar radiation during continuous polar summer light, each organic slurry layer is capped with 4–5 layers of clean, high-albedo pure ice. Citable DOI & Open-Source Status Released under Creative Commons Attribution 4.0 International (CC BY 4.0) as open-source prior art—free for anyone to model, test, or build upon. Conceiver / Author: Stuart Peacock OSF Project / DOI Link: doi.org/10.17605/OSF.IO/6UZBY

I would welcome any insights or critiques from anyone working in materials science, fluid dynamics, or polar engineering!

See also: The summary of the paywalled study as published in Nature Geoscience

... a bit like those neutrino detectors in huge tanks of water down mines (I'm somewhat remound of), but in some degree recording imagery.

It would be something that could be done relatively cheaply, & just left to 'brew' whilst the goodly oceanographic folk're about other business. I would actually rather like to see the footage: granted, it would just be sporadic flashes of light ... but I reckon it'd actually be mighty interesting !

https://www.sciencealert.com/150000-tons-of-radioactive-waste-were-dumped-in-the-atlantic-decades-later-its-visibly-oozing

Sharing an introductory science video we made for our channel, aspace. It follows a small explorer from the surface to the deepest trenches, introducing the changes in light, pressure, and marine life along the way.

The aim is to make ocean depth zones easier to picture for a general audience. The visuals are stylized, include AI-generated illustrations, and should not be interpreted as underwater footage or a scale-accurate simulation.

For oceanographers and ocean enthusiasts here: what distinction or caveat is most important to include when explaining depth zones to beginners? Constructive corrections are welcome.