Tasman Glacier (Tasman Glacier ) is located in Tasman Lake in Mount Cook National Park on New Zealand's South Island. It is the longest glacier in New Zealand, 27 kilometers long, 4 kilometers wide, 101 square kilometers in area, 600 meters thick, 3,000 meters above sea level, and is one of the longest glaciers in the world. The Tasman glaciers are slowly slipping at speeds ranging from 23 to 45 cm a day, and the slowness is almost invisible. As a representative of the closest glacier to the ocean, especially since 1995, glaciers have rapidly declined, and the front edge of the glaciers has retreated nearly 1 km.