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Mount Gakona
Mount Gakona is a mountain summit in Alaska. Description Mount Gakona is located northeast of Paxson in the Delta Mountains which are a subrange of the Alaska Range. The heavily glaciated mountain ranks as the fourth-highest peak in the Delta Mountains. Precipitation runoff and glacial meltwater from the mountain's north slope drains to Johnson Glacier → Johnson River → Tanana River, whereas the south slope drains to the Gakona Glacier → Gakona River → Copper River. Topographic relief is significant as the summit rises above the Johnson Glacier in 1.3 mile (2.1 km). The first ascent of the summit was made on March 24, 1980, by Daniel Osborne, Steve O'Brien, Mark Hottman, and Toby Wheeler. The climbers reported that the mountain has two peaks separated one mile apart by a knife-edged ridge. The word "Gakona" (Ggax Kuna' in Ahtna language) means "rabbit" or "rabbit river."Sandy Nestor, ''Indian Placenames in America'', Volume 1, McFarland, 2015, , p. 11. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Kimball
Mount Kimball is the highest mountain in the Delta Range, a subrange of the Alaska Range between Isabel Pass and Mentasta Pass, about 30 miles from Paxson. It is one of the twenty most topographically prominent peaks in Alaska. Mount Kimball is a relatively difficult climb for a peak with low absolute elevation, due to difficult ridge terrain, and it rebuffed eight climbing attempts by experienced Alaskan mountaineers before its first ascent in 1969. Due to its remoteness, difficulty, and low stature compared to other major Alaskan summits, the peak is not often climbed. __TOC__ See also *List of mountain peaks of North America **List of mountain peaks of the United States ***List of mountain peaks of Alaska *List of Ultras of the United States The following sortable table comprises the 200 most topographically prominent mountain peaks of the United States of America. The summit of a mountain or hill may be measured in three principal ways: #The topographic elevation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topographic Relief
Terrain (), alternatively relief or topographical relief, is the dimension and shape of a given surface of land. In physical geography, terrain is the lay of the land. This is usually expressed in terms of the elevation, slope, and orientation of terrain features. Terrain affects surface water flow and distribution. Over a large area, it can affect weather and climate patterns. Bathymetry is the study of underwater relief, while hypsometry studies terrain relative to sea level. Importance The understanding of terrain is critical for many reasons: * The terrain of a region largely determines its suitability for human settlement: flatter alluvial plains tend to have better farming soils than steeper, rockier uplands. * In terms of environmental quality, agriculture, hydrology and other interdisciplinary sciences; understanding the terrain of an area assists the understanding of watershed boundaries, drainage characteristics, drainage systems, groundwater systems, water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-thousanders Of The United States
Three-thousanders are mountains with a height of between , but less than above sea level. Similar terms are commonly used for mountains of other height brackets e. g. four-thousanders or eight-thousanders. In Britain, the term refers to mountains above . Climatological significance In temperate latitudes three-thousanders play an important role, because even in summer they lie below the zero degree line for weeks. Thus the chains of three-thousanders always form important climatic divides and support glaciation - in the Alps the contour is roughly the general limit of the "nival step"; only a few glaciated mountains are under (the Dachstein, the easternmost glaciated mountain in the Alps, is, at , not a three-thousander). In the Mediterranean, however, the three-thousanders remain free of ice and, in the tropics, they are almost insignificant from a climatic perspective; here the snow line lies at around to , and in the dry continental areas (Trans-Himalayas, Andes) it m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Of Alaska
Alaska occupies the northwestern portion of the North American continent and is bordered only by Canada on the east. It is one of two U.S. states not bordered by another state; Hawaii is the other. Alaska has more ocean coastline than all of the other U.S. states combined. About of Canadian territory consisting of British Columbia (in Canada) separate Alaska from Washington U.S. state. Alaska is thus an exclave of the United States that is part of the continental U.S. and the U.S. West Coast, but is not part of the contiguous U.S. The state is bordered by Yukon and British Columbia, Canada to the east, the Gulf of Alaska and the Pacific Ocean to the south, Russia (Chukotka Autonomous Okrug), Bering Sea, the Bering Strait, and the Chukchi Sea to the west, and the Beaufort Sea and the Arctic Ocean to the north. Because it extends into the Eastern Hemisphere, it is technically both the westernmost and easternmost state in the United States, as well as also being the northernmo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gakona, Alaska
Gakona (''Ggax Kuna’'' in Ahtna Athabascan) is a census-designated place (CDP) in the Copper River Census Area in the U.S. state of Alaska. As of the 2020 census, the population of the CDP was 169, down from 218 in 2010. It is home to the High-frequency Active Auroral Research Program. Geography and climate Gakona is located at (62.301940, -145.30194) (Sec. 18, T006N, R001E, Copper River Meridian). It is positioned in the Chitina Recording District in the center of Copper Valley, surrounded by mountains and the Copper River. Gakona is at the confluence of the Copper and Gakona rivers, northeast of Glennallen. It lies at mile 2 on the Tok Cut-Off to the Glenn Highway, just east of the Richardson Highway. Gakona is located in the continental climate zone, with long, cold winters and relatively warm summers. Temperature extremes have been recorded from . Snowfall averages , with total precipitation of per year. According to the United States Census Bureau, the CDP ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orographic Lift
Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation. Orographic lifting can have a number of effects, including precipitation, rain shadowing, leeward winds, and associated clouds. Precipitation Precipitation induced by orographic lift occurs in many places throughout the world. Examples include: * The Mogollon Rim in central Arizona * The western slope of the Sierra Nevada range in California. * The western slope of the Wasatch Range in Utah. Specifically the Little and Big Cottonwood Canyons. * The mountains near Baja California North – specifically La Bocana to Laguna Hanson. * The windward slopes of Khasi and Jayantia Hills (see Mawsynram) in the state of Meghalaya in India. * The Western Highlands of Yemen, which rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tundra Climate
The tundra climate is a polar climate sub-type located in high latitudes and high mountains. It is classified as ET according to the Köppen climate classification. It is a climate which at least one month has an average temperature high enough to melt snow (), but no month with an average temperature in excess of . If the climate occurs at high elevations, it is known as alpine climate. Despite the potential diversity of climates in the ''ET'' category involving precipitation, extreme temperatures, and relative wet and dry seasons, this category is rarely subdivided. Rainfall and snowfall are generally slight due to the low vapor pressure of water in the chilly atmosphere, but as a rule potential evapotranspiration is extremely low, allowing soggy terrain of swamps and bogs even in places that get precipitation typical of deserts of lower and middle latitudes. The amount of native tundra biomass depends more on the local temperature than the amount of precipitation. Tundra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indicates a tropical rainforest climate. The system assigns a temperature subgroup for all groups other than those in the ''A'' group, indicated by the third letter for climates in ''B'', ''C'', ''D'', and the second letter for climates in ''E''. Other examples include: ''Cfb'' indicating an oceanic climate with warm summers as indicated by the ending ''b.'', while ''Dwb'' indicates a semi-Monsoon continental climate, monsoonal continental climate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Board On Geographic Names
The United States Board on Geographic Names (BGN) is a Federal government of the United States, federal body operating under the United States Secretary of the Interior. The purpose of the board is to establish and maintain uniform usage of geography, geographic names throughout the federal government of the United States. History Following the American Civil War, more and more American pioneer, American settlers began moving westward, prompting the Federal government of the United States, U.S. federal government to pursue some sort of consistency for referencing landmarks on maps and in official documents. As such, on January 8, 1890, Thomas Corwin Mendenhall, superintendent of the United States Coast and Geodetic Survey Office, wrote to 10 noted geographers "to suggest the organization of a Board made up of representatives from the different Government services interested, to which may be referred any disputed question of geographical orthography." President Benjamin Harrison si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahtna Language
Ahtna or Ahtena (, from'' ''" Copper River") is the Na-Dené language of the Ahtna ethnic group of the Copper River area of Alaska. The language is also known as Copper River or Mednovskiy. The Ahtna language consists of four different dialects: Upper, Central, Lower, and Western. Three of the four are still spoken today. Ahtna is closely related to Dena'ina. The similar name Atnah occurs in the journals of Simon Fraser and other early European diarists in what is now British Columbia as a reference to the Tsilhqot'in people, another Northern Athapaskan group. Classification Ahtna is classified as belonging to the Northern Athabaskan languages, a subgrouping of the Athabaskan languages. History Ahtna is one of the eleven Athabaskan languages native to Alaska. The Ahtna language comes from the proto-Athabaskan language, believed to have evolved 5,000 to 10,000 years ago when humans migrated from Eurasia to North America over the Bering land bridge (Beringia), when it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Ascent
In mountaineering and climbing, a first ascent (abbreviated to FA in climbing guidebook, guide books), is the first successful documented climb to the top of a mountain or the top of a particular climbing route. Early 20th-century mountaineers and climbers focused on reaching the tops of iconic mountains (e.g. the eight-thousanders) and climbing routes (e.g. the great north faces of the Alps) by whatever means possible, often using considerable amounts of aid climbing, and/or with large expedition style support teams that laid "siege" to the climb. As all the key tops were summited, the manner in which each top was reached became important, particularly the ability to complete the ascent without artificial aid, which is called free climbing. In free climbing, the term first free ascent (abbreviated FFA) is used where a mountain or climbing route is ascended without any artificial aid (devices for climbing protection, protection in the event of a fall could be used as long as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper River (Alaska)
The Copper River or Ahtna River (; , "river of the Ahtnas"; ), "river of copper", is a 290-mile (470 km) river in south-central Alaska in the United States. It drains a large region of the Wrangell Mountains and Chugach Mountains into the Gulf of Alaska. It is known for its extensive delta ecosystem, as well as for its prolific runs of wild salmon, which are among the most highly prized stocks in the world. The river is the tenth largest in the United States, as ranked by average discharge volume at its mouth. Description The Copper River rises out of the Copper Glacier, which lies on the northeast side of Mount Wrangell, in the Wrangell Mountains, within Wrangell-Saint Elias National Park. It begins by flowing almost due north in a valley that lies on the east side of Mount Sanford, and then turns west, forming the northwest edge of the Wrangell Mountains and separating them from the Mentasta Mountains to the northeast. It continues to turn southeast, through a wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
