A glacier is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water.
Mount Kilimanjaro is a dormant volcano located in Kilimanjaro Region of Tanzania. It has three volcanic cones: Kibo, Mawenzi, and Shira. It is the highest mountain in Africa and the highest single free-standing mountain above sea level in the world: 5,895 metres (19,341 ft) above sea level and about 4,900 metres (16,100 ft) above its plateau base. It is the highest volcano in Africa and the Eastern Hemisphere.
Mount Hood is a potentially active stratovolcano in the Cascade Volcanic Arc. It was formed by a subduction zone on the Pacific coast and rests in the Pacific Northwest region of the United States. It is located about 50 mi (80 km) east-southeast of Portland, on the border between Clackamas and Hood River counties. In addition to being Oregon's highest mountain, it is one of the loftiest mountains in the nation based on its prominence, and it offers the only year-round lift-served skiing in North America.
Mount Kenya is the highest mountain in Kenya and the second-highest in Africa, after Kilimanjaro. The highest peaks of the mountain are Batian, Nelion and Point Lenana. Mount Kenya is located in the former Eastern and Central provinces of Kenya; its peak is now the intersection of Meru, Embu, Kirinyaga, Nyeri and Tharaka Nithi counties, about 16.5 kilometres south of the equator, around 150 km (90 mi) north-northeast of the capital Nairobi. Mount Kenya is the source of the name of the Republic of Kenya.
The Last Glacial Period (LGP), also known colloquially as the last ice age or simply ice age, occurred from the end of the Eemian to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago. The LGP is part of a larger sequence of glacial and interglacial periods known as the Quaternary glaciation which started around 2,588,000 years ago and is ongoing. The definition of the Quaternary as beginning 2.58 million years ago (Mya) is based on the formation of the Arctic ice cap. The Antarctic ice sheet began to form earlier, at about 34 Mya, in the mid-Cenozoic. The term Late Cenozoic Ice Age is used to include this early phase. The previous ice age, the Saale glaciation, which ended about 128,000 years ago, was more severe than the Last Glacial Period in some areas such as Britain, but less severe in others.
The Byrd Polar and Climate Research Center (BPCRC) is a polar, alpine, and climate research center at The Ohio State University founded in 1960.
In glaciology, an ice cap is a mass of ice that covers less than 50,000 km2 (19,000 sq mi) of land area. Larger ice masses covering more than 50,000 km2 (19,000 sq mi) are termed ice sheets.
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).
Lonnie Thompson, is an American paleoclimatologist and university professor in the School of Earth Sciences at Ohio State University. He has achieved global recognition for his drilling and analysis of ice cores from ice caps and mountain glaciers in the tropical and sub-tropical regions of the world. He and his wife, Ellen Mosley-Thompson, run the ice core paleoclimatology research group at the Byrd Polar Research Center.
The retreat of glaciers since 1850 affects the availability of fresh water for irrigation and domestic use, mountain recreation, animals and plants that depend on glacier-melt, and, in the longer term, the level of the oceans. Deglaciation occurs naturally at the end of ice ages, but glaciologists find the current glacier retreat is accelerated by the measured increase of atmospheric greenhouse gases and is an effect of climate change. Mid-latitude mountain ranges such as the Himalayas, Rockies, Alps, Cascades, Southern Alps, and the southern Andes, as well as isolated tropical summits such as Mount Kilimanjaro in Africa, are showing some of the largest proportionate glacial losses. Excluding peripheral glaciers of ice sheets, the total cumulated global glacial losses over the 26 year period from 1993–2018 were likely 5500 gigatons, or 210 gigatons per yr.
Grinnell Glacier is in the heart of Glacier National Park in the U.S. state of Montana. The glacier is named for George Bird Grinnell, an early American conservationist and explorer, who was also a strong advocate of ensuring the creation of Glacier National Park. The glacier is in the Lewis Range and rests on the north flank of Mount Gould at an altitude averaging 7,000 feet (2,100 m), in the Many Glacier region of the park.
Sperry Glacier is a glacier on the north slopes of Gunsight Mountain west of the Continental Divide in Glacier National Park in the U.S. state of Montana. Although many geologic features of Glacier National Park were formed during the much longer period of glaciation ending over 10,000 years ago, Sperry Glacier — like all the glaciers in the park today — is a product of the recent Little Ice Age, the period of cooler average temperatures starting in about the 13th century and concluding in the mid-19th century.
Furtwangler Glacier is located near the summit of Mount Kilimanjaro in Tanzania. The glacier is named after Walter Furtwängler who, with Siegfried König, formed the fourth party to ascend to the summit of Kilimanjaro in 1912.
Johannes Rebmann was a German missionary, linguist, and explorer credited with feats including being the first European, along with his colleague Johann Ludwig Krapf, to enter Africa from the Indian Ocean coast. In addition, he was the first European to find Kilimanjaro. News of Rebmann's discovery was published in the Church Missionary Intelligencer in May 1849, but disregarded as mere fantasy for the next twelve years. The Geographical Society of London held that snow could not possibly occur let alone persist in such latitudes and considered the report to be the hallucination of a malaria-stricken missionary. It was only in 1861 that researchers began their efforts to measure Kilimanjaro. Expeditions to Tanzania between 1861 and 1865, led by the German Baron Karl Klaus von der Decken, confirmed Rebmann's report. Together with his colleague Johann Ludwig Krapf they were also the first Europeans to visit and report Mount Kenya. Their work there is also thought to have had effects on future African expeditions by Europeans, including the exploits of Sir Richard Burton, John Hanning Speke, and David Livingstone. After losing most of his eyesight and entering into a brief marriage, he died of pneumonia.
Arrow Glacier is located near the summit of Mount Kilimanjaro in Tanzania, on the west slope of the peak and is a small remnant of an icecap which once crowned the summit of Mount Kilimanjaro. The glacier is situated at an elevation of between 5,470 and 5,300 metres. Arrow Glacier is adjacent to a climbing route known as the Western Breach/Arrow Glacier Route or more commonly, the Lemosho Route. Arrow Glacier is a recently named glacial remnant that may not even exist as of 2011. It was what remained of an earlier glacier known as the Little Barranco Glacier.
Barranco Glacier is near the summit of Mount Kilimanjaro in Tanzania, on the southwest slope of the peak and is a small remnant of an icecap which once crowned the top of Mount Kilimanjaro. The glacier is situated at an elevation of between 5,200 and 4,800 metres. The Great Barranco Glacier was far larger when first documented in the late 19th century and it along with the now extinct Little Barranco Glacier may have been fed by the Furtwängler Glacier which is on the top of the mountain. By 2011, Barranco Glacier was reduced to two small disconnected and dormant ice bodies.
Credner Glacier is on Mount Kilimanjaro in Tanzania, on the northwest slope of the peak and is a remnant of an icecap which once crowned the top of Mount Kilimanjaro. The glacier is situated at an elevation of between 5,800 and 5,500 metres. Credner Glacier is one of the largest glaciers on the mountain and descends from the Northern Ice Field. Credner is rapidly retreating due to its high exposure point on the northwest slope of Mount Kilimanjaro. A report published in 2013 indicated that in another decade the glacier may no longer exist.
The Northern Ice Field is near the summit of Mount Kilimanjaro in Tanzania, on the west slope of the peak. The Northern Ice Field and Eastern Ice Fields were connected to the Southern Ice Field and formed part of a continuous body of glacial ice atop Mount Kilimanjaro when first scientifically examined in 1912. By 1962 the Southern Ice Field separated from the Northern Ice Field and then by 1975 the Eastern Ice Field did as well. In 1912, the glaciated areas atop Mount Kilimanjaro covered 11.40 square kilometres (4.40 sq mi); by 2011 this had been reduced to 1.76 square kilometres (0.68 sq mi), an 85 percent loss. At one time, ice flowing off the Northern Ice Field fed numerous glaciers, including, north to south, the Credner, Drygalski, Great Penck and Little Penck Glaciers.
