2. Geography – Thwaites “Doomsday” Glacier and India’s Coastal Future

Context
The Thwaites Glacier in West Antarctica, called the “Doomsday Glacier”, is central to concerns about rapid sea‑level rise.

Background
Thwaites is a marine‑terminating glacier draining an area roughly equal to Great Britain. Warm Circumpolar Deep Water (CDW) intrudes beneath the ice shelf, causing basal melting and grounding‑line retreat—a classic case of marine ice‑sheet instability.

Data / Trend
In the last few decades, ice outflow has nearly doubled from this sector. Studies show vigorous melting along the grounding zone with the potential to contribute up to a few metres of global sea‑level rise over centuries if Thwaites and adjacent ice are destabilised.

Analysis & Application
For GS‑1 (Physical Geography), Thwaites illustrates cryospheric processes, glacial dynamics and tipping points.

For GS‑3, it directly affects India’s low‑lying coasts (Sunderbans, Mahanadi delta, Mumbai, Chennai) via sea‑level rise, storm surges and salinisation. It strengthens arguments for Coastal Regulation Zone (CRZ) norms, climate‑resilient infrastructure and planned retreat in the long term.

Way Forward
India should enhance polar research, link sea‑level projections to coastal‑zone planning, and invest in mangrove restoration, sea‑walls, early‑warning and zoning in vulnerable coastal belts.

Conclusion
Thwaites shows how distant polar change will reshape India’s coastal geography, requiring anticipatory adaptation rather than reactive disaster response.