Glaciology is the scientific study of glaciers, or, more generally, ice and natural phenomena that involve ice.
The Kobuk River, also known by the names Kooak, Kowak, Kubuk, Kuvuk, and Putnam, is a river located in the Arctic region of northwestern Alaska in the United States. It is approximately 280 miles (451 km) long. Draining a basin with an area of 12,300 square miles (32,000 km2), the Kobuk River is among the largest rivers in northwest Alaska, with widths of up to 1,500 feet and flows reaching speeds of 3–5 miles per hour in its lower and middle reaches. The average elevation for the Kobuk River Basin is 1,300 feet (400 m) above sea level, ranging from sea level at its mouth on the Bering Sea to 11,400 feet near its headwaters in the Brooks Range.
Glacier Bay National Park and Preserve is an national park of the United States located in Southeast Alaska west of Juneau. President Calvin Coolidge proclaimed the area around Glacier Bay a national monument under the Antiquities Act on February 26, 1925. Subsequent to an expansion of the monument by President Jimmy Carter in 1978, the Alaska National Interest Lands Conservation Act (ANILCA) enlarged the national monument by 523,000 acres on December 2, 1980, and created Glacier Bay National Park and Preserve. The national preserve encompasses 58,406 acres of public land to the immediate northwest of the park, protecting a portion of the Alsek River with its fish and wildlife habitats, while allowing sport hunting.
Mendenhall Glacier is a glacier about 13.6 miles (21.9 km) long located in Mendenhall Valley, about 12 miles (19 km) from downtown Juneau in the southeast area of the U.S. state of Alaska. The glacier and surrounding landscape is protected as part of the 5,815 acres (2,353 ha) Mendenhall Glacier Recreation Area, a federally designated unit of the Tongass National Forest.
Glacial motion is the motion of glaciers, which can be likened to rivers of ice. It has played an important role in sculpting many landscapes. Most lakes in the world occupy basins scoured out by glaciers. Glacial motion can be fast or slow, but is typically around 25 centimetres per day (9.8 in/d).
The Gulkana River is a 60-mile (97 km) tributary of the Copper River in the U.S. state of Alaska. Beginning near the southeastern end of Summit Lake in the Alaska Range, the river flows generally south to meet the larger river 9 miles (14 km) northeast of Glennallen. The Richardson Highway and the Trans-Alaska Pipeline run north–south, nearby and roughly parallel to the Gulkana River. Slightly south of Summit Lake the river passes under the east–west Denali Highway near its junction with the Richardson Highway at Paxson.
Taku Glacier is a tidewater glacier located in Taku Inlet in the U.S. state of Alaska, just southeast of the city of Juneau. Recognized as the deepest and thickest alpine temperate glacier known in the world, the Taku Glacier is measured at 4,845 feet (1,477 m) thick. It is about 58 kilometres (36 mi) long, and is largely within the Tongass National Forest.
Denali Highway is a lightly traveled, mostly gravel highway in the U.S. state of Alaska. It leads from Paxson on the Richardson Highway to Cantwell on the Parks Highway. Opened in 1957, it was the first road access to Denali National Park. Since 1971, primary park access has been via the Parks Highway, which incorporated a section of the Denali Highway from Cantwell to the present-day park entrance. The Denali Highway is 135 miles (217 km) in length.
Crucial to the survival of a glacier is its mass balance of which surface mass balance (SMB), the difference between accumulation and ablation. Climate change may cause variations in both temperature and snowfall, causing changes in the surface mass balance. Changes in mass balance control a glacier's long-term behavior and are the most sensitive climate indicators on a glacier. From 1980 to 2012 the mean cumulative mass loss of glaciers reporting mass balance to the World Glacier Monitoring Service is −16 m. This includes 23 consecutive years of negative mass balances.
Glacial surges are short-lived events where a glacier can advance substantially, moving at velocities up to 100 times faster than normal. Surging glaciers cluster around a few areas. High concentrations of surging glaciers occur in the Karakoram, Pamir Mountains, Svalbard, the Canadian Arctic islands, Alaska and Iceland, although overall it is estimated that only one percent of all the world's glaciers ever surge. In some glaciers, surges can occur in fairly regular cycles, with 15 to 100 or more surge events per year. In other glaciers, surging remains unpredictable. In some glaciers, however, the period of stagnation and build-up between two surges typically lasts 10 to 200 years and is called the quiescent phase. During this period the velocities of the glacier are significantly lower, and the glaciers can retreat substantially.
The retreat of glaciers since 1850 is a well-documented effect of climate change. The retreat of mountain glaciers provide evidence for the rise in global temperatures since the late 19th century. Examples include mountain glaciers in western North America, Asia, the Alps in central Europe, and tropical and subtropical regions of South America and Africa. Since glacial mass is affected by long-term climatic changes, e.g. precipitation, mean temperature, and cloud cover, glacial mass changes are one of the most sensitive indicators of climate change. The retreat of glaciers is also a major reason for sea level rise. Excluding peripheral glaciers of ice sheets, the total cumulated global glacial losses over the 26 years from 1993 to 2018 were likely 5500 gigatons, or 210 gigatons per year.
The tidewater glacier cycle is the typically centuries-long behavior of tidewater glaciers that consists of recurring periods of advance alternating with rapid retreat and punctuated by periods of stability. During portions of its cycle, a tidewater glacier is relatively insensitive to climate change.
Isabel Pass is a 40 mile long gap in the eastern section of the Alaska Range which serves as a corridor for the Richardson Highway about 11 miles from Paxson. It is named after Isabelle Barnette, the wife of E. T. Barnette, who helped found Fairbanks. The pass separates four regions, the Tanana Valley to the north, the Delta Mountains to the east, Copper River Basin to the south, and the Hayes Range to the west.
Summit Lake is located above the tree line on the south slope of the Alaska Range between miles 192 and 196 of the Richardson Highway (AR-4). It is about 200 miles (320 km) north of Valdez, 180 miles (290 km) south of Fairbanks, and just south of Isabel Pass at an elevation of 3,300 feet (1,000 m). It is also situated within the northeast corner of the census-designated place of Paxson, about 15 miles (24 km) upstream (north) of Paxson Lake.
Eklutna Glacier is a land terminating glacier in Chugach State Park and the Chugach Mountains near Anchorage, Alaska. Runoff from Eklutna Glacier contributes to Eklutna Lake, the main source of drinking water for the Anchorage community as well as hydroelectric power via the Eklutna Hydroelectric Project. However, Eklutna Glacier is shrinking in response to climate change which will inevitably affect downstream water resources. Eklutna Glacier is also known by the Dena'ina name: Idlu Bena Li'a.
Awesome Peak is an 8,645-foot-elevation (2,635-meter) mountain summit located 35 miles (56 km) east-northeast of Palmer, in the northern Chugach Mountains of Alaska. This peak of the Matanuska Valley is set midway between Anchorage and Glennallen, near mile 90 of the Glenn Highway. It is situated 15 miles (24 km) west of Matanuska Glacier and 3.7 mi (6 km) southwest of Amulet Peak. Precipitation runoff from the mountain drains into Monument and Coal creeks, which are tributaries of the Matanuska River. Topographic relief is significant as the summit rises 5,650 feet above Coal Creek in 3.75 miles (6 km) and 4,650 feet above Monument Creek in 1.9 mile (3 km). This mountain's toponym has not been officially adopted by the United States Board on Geographic Names, so it is only marked as "8645" on USGS maps.
Institute Peak is an 8,022-foot-elevation (2,445-meter) mountain summit in Alaska.
Alabaster Peak is an 8,065-foot-elevation (2,458-meter) mountain summit located 35 miles (56 km) east of Palmer, in the northern Chugach Mountains of Alaska. This peak of the Matanuska Valley is set midway between Anchorage and Glennallen, and can be seen from the Glenn Highway. It is situated 15 miles (24 km) west of Matanuska Glacier and 1.8 miles (2.9 km) south of Awesome Peak. Precipitation runoff from the mountain drains into Coal, Monument, and Gravel creeks, which are tributaries of the Matanuska River. Topographic relief is significant as the summit rises 3,065 feet along the west slope in one mile (1.6 km). The first ascent of the summit was made on July 4, 1970, by Robert Spurr, Bob Pelz, and Royce Purinton via the Spectrum Glacier and North Ridge. This mountain's toponym has not been officially adopted by the United States Board on Geographic Names, so it is only marked as "8065" on USGS maps.
Rainbow Mountain is a 6,841-foot-elevation (2,085-meter) summit in Alaska, United States.
