Ocean Deoxygenation

DISCLAIMER — Real Science, No Framework Bridge

Why no UTAC/CREP/AFET bridge: not only because the cited literature already provides the necessary quantitative structure -- a deliberate choice. This project's highly speculative AFET/UTAC experiments must never stand in the way of climate/ecology topics being accessible and usable to people who don't work inside that construct and aren't looking for renormalization groups. Real, checkable science, without the burden of an unproven framework. See PACKAGE_REGISTRY.md's "Why no UTAC/CREP/AFET bridge in the climate/ecology series" (2026-08-31) in the GenesisAeon workspace root for the full canonical note.

Status: Real, verified science + NO UTAC/CREP/AFET bridge

What this is

• Ocean deoxygenation is the measurable, ongoing decline of dissolved
• oxygen in the open ocean and coastal waters, already observed over
• decades, not merely projected.
• Schmidtko et al. (2017, Nature 542, 335-339): global ocean oxygen
• content has declined by more than 2% over the past five decades; less
• than 15% of that loss is attributable to warming-driven solubility
• loss alone, the rest to circulation and biological changes.
• Breitburg et al. (2018, Science 359, eaam7240): 1-2% of the global
• ocean oxygen inventory lost since the mid-20th century; over 700
• coastal sites report new or worsening low-oxygen conditions; models
• project a further 1-7% inventory decline and a 50% increase in
• hypoxic water volume by 2100.
• Oschlies (2021, Nature Communications 12, 2307): even under an
• immediate halt to CO2 emissions, less than 25% of the eventual,
• millennial-scale committed deoxygenation is realized today — the deep
• ocean (>2000 m) alone is already committed to losing more than 10% of
• its

…

ocean-deoxygenation-utac

[](https://github.com/GenesisAeon) [](https://github.com/GenesisAeon/ocean-deoxygenation-utac/actions/workflows/ci.yml) [](https://www.python.org) [](LICENSE) [](https://doi.org/10.5281/zenodo.21780590)

GenesisAeon Package 93 — real ocean deoxygenation science. Deliberately has no UTAC/CREP/AFET bridge — see DISCLAIMER.md.

For a plain-language explanation of the same topic (German, no jargon, written for general audiences), see WHITEPAPER.md.

What's real here

• Schmidtko et al. (2017, Nature): >2% global ocean oxygen decline over
• the past 5 decades, <15% attributable to warming-driven solubility loss.
• Breitburg et al. (2018, Science): 1-2% inventory loss since the
• mid-20th century, 700+ worsening coastal sites, projected 1-7% further
• loss and +50% hypoxic volume by 2100.
• Oschlies (2021, Nature Communications): under zero future emissions,
• <25% of eventual committed deoxygenation is realized today — much more
• is already locked in, especially in the deep ocean.

Quickstart

bash pip install ocean-deoxygenation-utac

```python from ocean_deoxygenation_utac import committed_loss_exceeds_realized

print(committed_loss_exceeds_realized()) # True ```

Development

bash pip install -e ".[dev]" pre-commit install ruff check src tests mypy src pytest

Citation

See CITATION.cff and .zenodo.json.