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Juneau Icefield
The Juneau Icefield is an ice field located just north of Juneau, Alaska, continuing north through the border with British Columbia, extending through an area of in the Coast Range ranging north to south and east to west. The icefield is the source of many glaciers including the Mendenhall Glacier and the Taku Glacier. The icefield is home to over 40 large valley glaciers and 100 smaller ones. The Icefield serves as a tourist attraction with many travellers flown in by helicopter for quick walks on the deep ice and the massive, awe-inspiring moist crevasses. The icefield, like many of its glaciers, reached its maximum glaciation point around 1700 and has been in retreat since. In fact, of the icefield's 19 notable glaciers, the Taku Glacier is the only one presently advancing. Much of the icefield is contained within the Tongass National Forest. Since 1948, the Juneau Icefield Research Program has monitored glaciers of the Juneau Icefield. On the west side of the icefield, from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juneau Icefield
The Juneau Icefield is an ice field located just north of Juneau, Alaska, continuing north through the border with British Columbia, extending through an area of in the Coast Range ranging north to south and east to west. The icefield is the source of many glaciers including the Mendenhall Glacier and the Taku Glacier. The icefield is home to over 40 large valley glaciers and 100 smaller ones. The Icefield serves as a tourist attraction with many travellers flown in by helicopter for quick walks on the deep ice and the massive, awe-inspiring moist crevasses. The icefield, like many of its glaciers, reached its maximum glaciation point around 1700 and has been in retreat since. In fact, of the icefield's 19 notable glaciers, the Taku Glacier is the only one presently advancing. Much of the icefield is contained within the Tongass National Forest. Since 1948, the Juneau Icefield Research Program has monitored glaciers of the Juneau Icefield. On the west side of the icefield, from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Twin Glacier
West or Occident is one of the four cardinal directions or points of the compass. It is the opposite direction from east and is the direction in which the Sun sets on the Earth. Etymology The word "west" is a Germanic word passed into some Romance languages (''ouest'' in French, ''oest'' in Catalan, ''ovest'' in Italian, ''oeste'' in Spanish and Portuguese). As in other languages, the word formation stems from the fact that west is the direction of the setting sun in the evening: 'west' derives from the Indo-European root ''*wes'' reduced from ''*wes-pero'' 'evening, night', cognate with Ancient Greek ἕσπερος hesperos 'evening; evening star; western' and Latin vesper 'evening; west'. Examples of the same formation in other languages include Latin occidens 'west' from occidō 'to go down, to set' and Hebrew מַעֲרָב maarav 'west' from עֶרֶב erev 'evening'. Navigation To go west using a compass for navigation (in a place where magnetic north is the same di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retreat Of Glaciers Since 1850
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—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.Fox-Kemper, B., H.T. Hewitt, C. Xiao, G. Aðalgeirsdóttir, S.S. Drijfhout, T.L. Edwards, N.R. Golledge, M. Hemer, R.E. Kopp, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Glaciers
A glacier ( ) or () is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. Because glacial mass is affected by long-term climate changes, e.g., precipitation, mean temperature, and cloud cover, glacial mass changes are considered among the most sensitive indicators of climate change. There are about 198,000 to 200,000 glaciers in the world. Glaciers by continent Africa Africa, specifically East Africa, has contained glacial regions, possibly as far back as the last glacier maximum 10 to 15 thousand years ago. Seasonal snow does exist on the highest peaks of East Africa as well as in the Drakensberg Range of South Africa, the Stormberg Mountains, and the Atlas Mountains in Morocco. Current ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendenhall Towers
Mendenhall Glacier (in Tlingit language “Sít”) is a glacier about long located in Mendenhall Valley, about from downtown Juneau, Alaska, Juneau in the southeast area of the U.S. state of Alaska. The glacier and surrounding landscape is protected as part of the Mendenhall Glacier Recreation Area, a federally designated unit of the Tongass National Forest. The Juneau Icefield Research Program has monitored the outlet glaciers of the Juneau Icefield since 1942, including Mendenhall Glacier. The glacier has also retreated since 1929, when Mendenhall Lake was created, and over since 1500. The end of the glacier currently has a negative glacier mass balance and will continue to retreat in the foreseeable future. Given that average yearly temperatures are currently increasing, and the outlook is for this trend to continue, it is actually possible that the glacier might experience a period of stabilization or slight advance during its retreating march. This is because incre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camp 15 Peak
Camp 15 Peak is a mountain in the borough of Juneau, Alaska, United States. It is part of the Boundary Ranges of the Coast Mountains in western North America. On the divide east of Battle Glacier, it is located 3 miles southwest of The Tusk and 28 miles north-northwest of the city of Juneau. The Juneau Icefield Research Program (JIRP) included Camp 15 Peak in its 2001 survey of conditions throughout parts of the Juneau Icefield. The peak was noted by the JIRP in 1964 and entered into the United States Geological Survey's Geographic Names Information System The Geographic Names Information System (GNIS) is a database of name and locative information about more than two million physical and cultural features throughout the United States and its territories, Antarctica, and the associated states of ... on January 1, 2000. References Boundary Ranges Mountains of Juneau, Alaska Mountains of Alaska {{JuneauAK-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taku Towers
Taku may refer to: Places North America * the Taku River, in Alaska and British Columbia ** Fort Taku, also known as Fort Durham and as Taku, a former fort of the Hudson's Bay Company near the mouth of the Taku River ** the Taku Glacier, in Alaska near Juneau ** Taku Towers, in Alaska, near Juneau ** Taku Harbor, in Alaska, near Juneau ** Taku Inlet, in Alaska ** the Taku Plateau, in British Columbia * Taku Arm of Tagish Lake in British Columbia ** Taku, British Columbia, a locality on Tagish Lake Asia * Taku Forts, forts on the south bank of the Hai He, in Tanggu District, Tianjin municipality, in northeastern China * Taku, Saga, a city in Saga prefecture on the island of Kyūshū, Japan * Taku, India, a town in India Oceania * Taku, Kiribati, a village in Kiribati. Peoples * The Taku people, an Alaska Native group, who are a ''kwaan'' or tribe of the Tlingit * Taku River Tlingit First Nation, government in British Columbia People Surname * Moses Taku, a rabbi, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Snow Towers
The Snow Towers is a glaciated mountain summit located in the Boundary Ranges of the Coast Mountains, in the U.S. state of Alaska. The two peaks, 0.1 mi apart, are situated at the apex of the Taku and Herbert Glaciers near the western edge of the Juneau Icefield, north of Juneau, southwest of Snowpatch Crag, and northeast of Mount Ernest Gruening, on land managed by Tongass National Forest. The mountain was named by members of the Juneau Icefield Research Project in 1964, and was officially adopted in 1965 by the U.S. Board on Geographic Names. The first ascent was made in 1984 by Charles "Dick" Ellsworth and Bruce Tickell. Climate Based on the Köppen climate classification, The Snow Towers is located in a subpolar oceanic climate zone, with long, cold, wet winters, and cool summers. Most weather fronts originate in the Pacific Ocean, and travel east toward the Coast Mountains where they are forced upward by the range (Orographic lift Orographic lift occurs when an ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emperor Peak (Alaska)
Emperor Peak is a glaciated mountain summit located in the Boundary Ranges of the Coast Mountains, in the U.S. state of Alaska. Emperor Peak is situated in the Taku Range of the Juneau Icefield, north of Juneau, and south-southwest of Taku Towers, on land managed by Tongass National Forest. The Taku Range is a north–south trending ridge on the edge of the Taku Glacier. This mountain was named in 1964 by members of the Juneau Icefield Research Project, and officially adopted in 1965 by the U.S. Geological Survey. Climate Based on the Köppen climate classification, Emperor Peak is located in a subpolar oceanic climate zone, with long, cold, snowy winters, and cool summers. Weather systems coming off the Gulf of Alaska are forced upwards by the Coast Mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall. Temperatures can drop below −20 °C with wind chill factors below −30 °C. The month of July offers the most favorab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nelles Peak
Nelles Peak is a remote mountain summit located in the Coast Mountains of British Columbia, Canada. It is situated at the northeastern periphery of the Juneau Icefield, inside the BC-Alaska boundary, on the west side of Tulsequah Lake. Its nearest higher peak is Devils Paw, to the southeast. Nelles Peak is the second-highest summit of the icefield, after Devils Paw. The mountain was named in 1924 to honor Douglas H. Nelles (1881–1960), a Canadian engineer who participated with the International Boundary Survey party of 1907. The mountain's name was officially adopted in 1947 when approved by the Geographical Names Board of Canada. Climate Based on the Köppen climate classification, Nelles Peak has a subarctic climate with cold, snowy winters, and mild summers.. Most weather fronts originate in the Pacific Ocean, and travel east toward the Coast Mountains where they are forced upward by the range (Orographic lift), causing them to drop their moisture in the form of rain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devils Paw
Devils Paw (or Devil's Paw, or Boundary Peak 93) is the high point of the Juneau Icefield, on the Alaska-British Columbia border. It is a part of the Boundary Ranges of the Coast Mountains. It is notable for its steep rise above the low local terrain. Its height is sometimes given as 8,507 feet (2,593 m). Devils Paw is located on the northeast side of the Juneau Icefield, and its north slopes feed Tulsequah Lake and the Tulsequah Glacier. Its south slope forms the head of the picturesquely-named "Hades Highway", which is the eastern extremity of the Icefield. To illustrate the steepness of the peak: the north face drops in approximately three miles (4.8 km), and the southeast side drops in about seven miles (11.3 km). __NOTOC__ Climate Based on the Köppen climate classification, Devils Paw is located in a subpolar oceanic climate zone, with long, cold, snowy winters, and cool summers. Temperatures can drop below −20 °C with wind chill factors below −30 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier Mass Balance
Crucial to the survival of a glacier is its mass balance or surface mass balance (SMB), the difference between accumulation and ablation (sublimation and melting). 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. A glacier with a sustained negative balance is out of equilibrium and will retreat, while one with a sustained positive balance is out of equilibrium and will advance. Glacier retreat results in the loss of the low elevation region of the glacier. Since higher elevations are cooler than lower ones, the disappearance of the lowest portion of the glacier reduces overall ablation, thereby incr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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