PNAS Science Sessions17 Helmi 2025

Climate effects and shifting Arctic coastlines

Erosion, subsidence, and sea level rise on Arctic coastlines

Science Sessions are brief conversations with cutting-edge researchers, National Academy members, and policymakers as they discuss topics relevant to today's scientific community. Learn the behind-the-scenes story of work published in the Proceedings of the National Academy of Sciences (PNAS), plus a broad range of scientific news about discoveries that affect the world around us.

In this episode, Roger Creel describes how compounding forces could reshape a thawing Arctic coastline.

In this episode, we cover:
•[00:00] Introduction
•[00:57] Sea level geophysicist Roger Creel introduces the importance of subsidence in Arctic coastline erosion.
•[02:04] Creel describes his firsthand experiences seeing how erosion, subsidence, and sea level rise are impacting Alaskan communities.
•[03:43] He explains how his model of coastline impacts was constructed.
•[05:49] He describes the results of the study.
•[06:43] Creel talks about the risks to coastal infrastructure.
•[08:10] He lists the caveats and limitations of the study.
•[08:54] Creel says that the coastline impacts may differ in different parts of the Arctic, depending on glacial history.
•[09:25] He explains the takeaways from the study.
•[10:39] Conclusion.

About Our Guests:

Roger Creel
Postdoctoral scholar
Woods Hole Oceanographic Institution

View related content here: https://www.pnas.org/doi/full/10.1073/pnas.2409411121

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