As the climate is rapidly changing due to several factors, Alaskan glaciers are melting faster than anticipated by scientists. Tidewater glaciers are melt ice at the bottom of the glacier at a substantial rate. Accurate calculation of the amount of ice melted is critical keeping in mind rising sea level is very tough. A portion of the glacier breaks off while another portion melts. A team of scientists studied these Alaskan glaciers. They tracked its movement by time-lapse cameras. By the new method of measurement of melting of glaciers, it is easy to triangulate which part of the glacier melts at a higher rate. Considerable portion of the glacier melts due to the warm ocean water. Also, depending on the weather conditions, melting rates are affected by more than three times.
Glaciers in Alaska mainly experience melting of ice at the surface. The number of tidewater glaciers is very few in Alaska. Calving and melting of the glacier are natural. Glaciers may be as large as a hundred feet below the sea surface. As melting is occurring quite fast, it suggests glaciers are very sensitive to ocean change. As sea level across the globe is rising at a tremendously high rate, it is very essential to be prepared. Therefore, calculating glacier melting occurring at excessive rates is crucial to be prepared and plan for increasing sea levels. Also, iceberg keeps calving from the glacier, which sometimes poses a problem for ships.
Glacial ice speeds up as ice come close to the glacier. Oceanographers conducted a sonar survey undersea. Also, finding out the basic properties of seawater such as temperature, salinity, etc. is necessary to get a precise idea of the melting rate of glaciers. To calculate these, especially in summer is somewhat difficult as melting rate accelerates. The scientist performed the experiment twice in summer and from the obtained data set, determined the total melting rate for a portion of the glacier below the sea surface which was more than expected.