This Nov. 8, 2019, photo provided by John Guillote shows the Chukchi Sea from the top deck of the research vessel the Sikuliaq. University of Washington scientists onboard the research vessel are studying the changes and how less sea ice will affect coastlines, which already are vulnerable to erosion because increased waves delivered by storms. More erosion would increase the chance of winter flooding in villages and danger to hunters in small boats. (John Guillote via AP)