Alaska

Amplified Arctic warming in recent decades has caused a multitude of changes in terrestrial ecosystems that have potential for strong feedbacks to the global system. Arctic vegetation greening may not necessarily result in increases in carbon sequestration in Arctic tundra due to complex and uncertain soil processes. Arctic tundra tends to have a thicker organic soil horizon (peat) than most other zonal biomes; research shows that peatlands comprise a sustained carbon sink.

One locus of crosslinguistic variation in how languages build words is whether meaning is encoded in free morphemes (units of meaning) that stand alone as words, or whether those morphemes must combine with other morphemes to become words. While English has many free morphemes, the Alaska Native language, St. Lawrence Island/Siberian Yupik, uses the second strategy with very complex words, often sentence-sized. These properties are known as agglutination and polysynthesis.

The future trajectory of Earth's atmosphere depends on the response of land and ocean to a changing environment, especially the potential for substantial sustained carbon release in high latitude regions like the Arctic. A key question in understanding how the Earth system will respond is whether there are tipping points—global carbon cycle surprises—that will make the effects of environmental change such as sea-level rise, extreme weather, droughts, and impacts on agriculture occur faster than currently projected by models.

There is great concern about changing conditions in the Arctic due to environmental transformations that are impacting tundra and its underlying permafrost. At the same time, there are major gaps in our understanding of tundra/permafrost microbiology and elemental cycling. Filling these knowledge gaps will enable a better overall understanding of the tundra, and can provide crucial information about how this globally important, but fragile ecosystem will respond to change.

This Research Coordination Network (ANCHOR) will integrate social science, natural science, and engineering to address the imminent challenges that coastal communities in the Alaskan Arctic face due to rapid permafrost thaw and coastal erosion. These processes are causing buildings, roads, and areas of cultural significance to be undermined as coastlines subside and collapse into the sea. These communities are considering a range of options, which include abandoning their homelands for higher ground or building seawalls to limit erosion.

This award supports a Research Coordinating Network (RCN) that brings together scientists and Indigenous communities, Alaska Native communities and Tribal communities in the U.S. Southwest, to advance understanding of the challenges rapid socioecological change pose to food security and resilience in these communities.

The workshop considered future innovations in transportation technology and policies in the Arctic that could address challenges associated with rapid climate change. One transportation challenge, for example, is the limited network of roads which are now being undermined by permafrost thaw and flooding; while another challenge is the subsistence based rural economies which may face food shortages.

The Permafrost Coastal Erosion-RCN (PCE-RCN) will bring together leaders in fields of natural and social science and engineering to address the challenges faced by coastal communities in the Arctic due to rapid coastal erosion. Rapid coastal erosion can force communities to consider moving inland and limit access to resources. One goal of the proposed PCE-RCN will be to better understand the challenges associated with coastal erosion, which is driven by permafrost thaw and changing sea ice conditions.

The Arctic is warming on average twice as rapidly as the rest of the planet, which is leading to significant changes in sea ice to which local communities must respond. Beringia, a region of the Arctic encompassing US and Russian territory, is expected to experience some of the highest variability in sea ice conditions in the coming century. This project focuses on the question: how do we design better and more flexible governance and infrastructure to adapt to changing Arctic conditions?

Navigating the New Arctic (NNA) is one of NSF's 10 Big Ideas. NNA projects address convergence scientific challenges in the rapidly changing Arctic. The Arctic research is needed to inform the economy, security and resilience of the Nation, the larger region and the globe. NNA empowers new research partnerships from local to international scales, diversifies the next generation of Arctic researchers, and integrates the co-production of knowledge. This award fulfills part of that aim.