Feb
19
Erosion along the coast of Alaska has seen a severe increase in the last 5 years. The amount of erosion has more than double between 2002 and 2007 along a 40 mile piece of the Beaufort Sea. Up to 45 feet is eroding each year.
The U.S. Geological Survey led a study that examined erosion along the Beaufort Sea over the years. What they have seen is a severe increase in erosion from 28 feet per year between the late 1970 and early 2000s to the current rate of 45 feet per year. Their findings appear in the current issue of Geographical Research Letters.
As you can well imagine, this is not good for coastal buildings. There is also some threat to oil exploration in the area, as the coastal erosion has already been responsible for the loss of a 1970s test oil well. Another test well located at Drew Point is also threatened.
The study states that the increase in the rate of erosion and the changing pattern of it could possibly be due to climate change in the Arctic, particularly warmer temperatures that, subsequently, lead to further causes of the increase in erosion, such as the melting of the ice shelf, rising sea levels. Increased storm power may also be a factor, which, in turn increases wave action.
The leading author of the study, USGS scientist Benjamin Jones and the other authors of the study write that, “Taken together, these factors may be leading to a new era in ocean-land interactions that seem to be repositioning and reshaping the Arctic coastline. And any increases in the current rates of coastal retreat will have further ramifications on Arctic landscapes – including losses in freshwater and terrestrial wildlife habitats, and in disappearing cultural sites, as well as adversely impacting coastal villages and towns. In addition, oil test wells are threatened.”