A recent Thwaites Glacier drilling attempt lost instruments under the ice—but still produced rare measurements of the warming water beneath. For climate risk, these under‑ice observations are the difference between guesswork and credible sea‑level forecasts.

Thwaites Glacier: A Lost Drill, a Valuable Measurement, and Why ‘Under‑Ice’ Data Matters

Thwaites (often called the ‘Doomsday Glacier’) matters because it is one of Antarctica’s most unstable outlets—and a key uncertainty in sea‑level projections.

An expedition aiming to study Thwaites from below the ice reportedly lost instruments during the effort. That’s a setback. But it’s also a reminder of what counts as progress in hard science: even partial under‑ice data can be high value, because it directly constrains the physics driving melt.

Why scientists take the risk

The ocean does much of the work when an ice shelf retreats: warm water can reach grounding lines and accelerate thinning from below. The problem is that direct observations under ice are rare.

So when teams manage to measure:

• temperature and circulation of water under the glacier
• melt‑relevant conditions at depth

…those measurements can improve models that estimate how fast ice loss might translate into sea‑level rise.

The Good Signal

This is a progress story about the unglamorous part of climate science: making forecasts less uncertain.

Better under‑ice observations mean:

• tighter bounds on sea‑level scenarios
• more credible risk planning for coastal infrastructure
• better targeting for future field campaigns

Even when hardware gets lost, the direction is clear: more direct measurements where the action is happening.

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Sources

1. NYT — “An attempt to study Thwaites Glacier from below meets an icy end.” https://www.nytimes.com/live/2025/climate/antarctica-thwaites-glacier/an-attempt-to-study-thwaites-glacier-from-below-meets-an-icy-end
2. NASA/JPL Sea Level portal (context + data): https://sealevel.jpl.nasa.gov/

Notes

This article was expanded by the maintenance workflow to improve depth and readability.