Solivik Island, Utukok Pass

Solivik Island, Utukok Pass

by | Feb 24, 2021

Solivik Island is a barrier island that extends southwest for 16.5 miles (27 km) from Icy Cape Pass to Utukok Pass and forms the northern portion of Kasegaluk Lagoon, about 69 miles (111 km) southwest of Wainwright and 28 miles (45 km) north-northeast of Point Lay, Alaska. The Iñupiat name for the island means “a sewing place” first reported in 1956 by cartographer T.E. Taylor of the U.S. Geological Survey. Utukok Pass is a water passage navigable by small boats between the Chukchi Sea and Kasegaluk Lagoon.

Barrier islands are elongated accumulations of sand parallel to shore that in the Arctic are constructed by waves and wind-driven ice shoving. In some locations, they are isolated and separated from the mainland by lagoons depending on the hydrodynamic regime and sediment transport processes of the area. Solivik Island is a relatively recent deposit of sediment with the location, shape, and geomorphology controlled by the amount and type of sediment and the stability of wave energy and sea level. Along Alaska’s Arctic coast, these types of barrier islands are low (less than 2 m high), narrow (50- 200 m wide), and long. The length is broken occasionally by narrow inlets that provide the connection between the lagoons and the ocean. These islands are susceptible to coastal erosion since sediment is deposited by ice and eroded by waves, so shorter periods of an ice-covered ocean will result in longer periods of wave erosion.

Over one-third of the Chukchi coast is protected by a chain of narrow barrier islands. Along with their associated lagoons, this ecosystem is vital to the birds, mammals, and fish in the region; however, they are under threat from rising seas, loss of sea ice, and increased storm surges. The erosion, or periodic inundation of barrier islands, in addition to the presence of new predators moving north in concert with a changing climate, creates new risks for many of the animals that live and breed along this coast. For example, Pacific common eiders breed on many barrier islands in the Chukchi Sea and are an important subsistence species contributing to food security for several coastal communities. They have also been recognized as a species of concern because of population declines and threats from climate change and habitat disturbance. Common eiders are now the highest-risk waterbird population on Alaska’s Arctic coast, largely due to potential overwash and erosion of their nesting habitat. See a short video of ice shoving here. Read more here and here. Explore more of Solivik Island here:

About the background graphic

This ‘warming stripe’ graphic is a visual representation of the change in global temperature from 1850 (top) to 2022 (bottom). Each stripe represents the average global temperature for one year. The average temperature from 1971-2000 is set as the boundary between blue and red. The color scale goes from -0.7°C to +0.7°C. The data are from the UK Met Office HadCRUT4.6 dataset. 

Credit: Professor Ed Hawkins (University of Reading). Click here for more information about the #warmingstripes.

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