Home Environment & Climate RS technology identifies permafrost degradation in Arctic wetlands

RS technology identifies permafrost degradation in Arctic wetlands

US: A team of geoscientists from Southwest Research Institute (SwRI) using remote-sensing technology have achieved unprecedented detail in quantifying subtle, long-period changes in the water levels of shallow lakes and ponds in hard-to-reach Arctic wetlands. Analysis comparing time-lapsed, high-resolution satellite imagery of the Ahnewetut Wetlands in Kobuk Valley National Park, Alaska, revealed an accelerated loss of surface water in shallow thaw lakes and ponds over a recent 27-year period compared to the preceding 27-year timespan. Those periods generally coincide with a well-known cooling and warming cycle known as the Pacific Decadal Oscillation, whose period is about five decades.

Source: WSJ