New images from NASA show that two once-huge ice sheets have completely disappeared on the chilly Canadian island of Elsmere, according to a recent nasa nare. The two ice sheets have been around for centuries, and scientists predicted their demise in 2017, and their complete disappearance could have a huge impact on the environment.
The ice sheet is a vast land area covered with extremely thick ice, and the formation, extinction, melting water and the change of its distribution and composition directly affect the geological and natural environment changes in local areas and the whole world.
The lost ice sheet is the St. Patrick’s Bay ice sheet on Ellesmere Island in the Canadian Arctic, where they have been around for hundreds of years. When the first research team arrived in 1959, the ice sheet covered nearly 7.5 square kilometers and 3 square kilometers, respectively. The researchers, who re-examined the ice sheet in 2017, compared satellite data from July 2015 with vertical aerial photographs taken in August 1959 and found that the ice sheet had been reduced to only 5 percent of the ice area.
Scientists at the U.S. National Snow and Ice Data Center, writing in the 2017 journal Frozen Circle, predict that the ice sheet will melt completely within the next five years if greenhouse gas emissions are not controlled, and the latest images from NASA’s Advanced Onborne Heat Launch and Reflector (ASTER) show that this prediction is accurate – the ice sheet has completely disappeared in the ASTER image taken on July 14, 2020.
Mark Serez, director of the NSIDC and a professor at the University of Boulder in Colorado, first dabbled in the St. Patrick’s Bay ice sheet in 1982. “When I first visited the ice sheets, they looked like permanent landscapes.” “I was shocked to see them ‘die’ in less than 40 years,” he said. “
The ice sheet in St. Patrick’s Bay, which is part of the Hasen Plateau and is believed to date back to the time of the Filling River, “has long been known that the Arctic is particularly affected by climate change,” Mr. Serez said. But the disappearance of two ice sheets, which I knew very well, made global climate change a more personal matter for me. All I have left is photos and a lot of memories. “