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词条 Rogers Pass (Montana)
释义

  1. Origin of name

  2. Record cold temperature

  3. Golden eagle migration route

  4. Climate

  5. See also

  6. Cited references

{{Infobox mountain pass
| name = Rogers Pass
| photo =
| photo_caption =
| elevation_ft = 5610
| elevation_ref =
| traversed = {{jct|state=MT|MT|200|}}
| location = Lewis and Clark County, Montana, United States
| map = USA Montana
| range = Rocky Mountains
| coordinates = {{coord|47|04|35|N|112|22|11|W|type:pass_region:US}}
| topo = USGS Rogers Pass (MT)
}}

Rogers Pass is a mountain pass that rises {{convert|5610|ft|m}} above sea level and is located on the Continental Divide in the U.S. state of Montana.[1] The pass is adjacent to Helena National Forest and is traversed by Montana Highway 200, providing the shortest route between the cities of Great Falls and Missoula, Montana.

Rogers Pass is famous for measuring the lowest temperature ever recorded in the contiguous United States. The Pass experienced a temperature of {{convert|-70|F|C}} on January 20, 1954. Only Alaska, Antarctica, Canada, and Russia have recorded lower temperatures.

Rogers Pass is more than {{convert|100|mi|km}} south of Marias Pass, and there are no other roads that cross the Continental Divide between these two passes. The region between the two passes is mostly wilderness, and the majority of it has been set aside and protected from future development. The Great Bear, Scapegoat and Bob Marshall Wildernesses have been consolidated into the Bob Marshall Wilderness Complex and permanently protect {{convert|1535352|acre|km2}}. The region is noted for its inaccessibility and as one of the last strongholds for the grizzly bear in the lower 48 states.[2] The Scapegoat Wilderness is a {{convert|10|mi|km}} hike north of Rogers Pass via the Continental Divide Trail.

Origin of name

Rogers Pass in Montana was named by the Great Northern Railway for one of the line's locating surveyors,[3] A.B. Rogers, who located the pass in 1887. Rogers has the distinction of having two passes named after him, this one in Montana and another Rogers Pass in British Columbia, Canada, c.373 miles to the north-west. In 1881 and 1882 A.B. Rogers was a surveyor for the Canadian Pacific Railway, and he located Rogers Pass in British Columbia, Canada, which was then used by the Canadian Pacific Railway (CPR) on its transcontinental line across Canada. The CPR named the pass after Rogers. James Jerome Hill, who controlled the Great Northern, then hired Rogers as a locating engineer on the latter, which built into Montana in 1887. Shortly after Rogers had located the pass in Montana that bears his name, his career ended when he was badly injured falling from his horse.[4] Although Hill and the Great Northern eventually chose Marias Pass, 100 miles to the north, as the route over the Continental Divide for their transcontinental railroad, Hill saw to it that Rogers Pass in Montana was named after the surveyor.

Record cold temperature

Rogers Pass is the location of the coldest temperature ever recorded in the United States outside of Alaska. On January 20, 1954, a low temperature of {{convert|-70|°F|°C|abbr=on}} was recorded during a severe cold wave.[5]

Golden eagle migration route

The region is a noted location for observation of golden eagles and, to a lesser extent, bald eagles. In March and April, strong westerly winds help migrating flocks of eagles cross the Continental Divide so that they can spend the summer on the Great Plains. During these months, over 800 golden eagles and 129 bald eagles have been observed heading east. From mid-September through October, a similar migration occurs, but in the opposite direction. This is also a migration route used by other raptors such as northern goshawks, red-tailed hawks, and rough-legged hawks. Canada geese, tundra swans, and snow geese also use the pass during migration periods. The golden eagles and other birds can be observed from a distance as close as {{convert|100|to|500|ft|m}}.[6]

Climate

According to the Köppen Climate Classification system, Rogers Pass has a humid continental climate, abbreviated "Dfb" on climate maps.[7]

{{Weather box
|location = Rogers Pass
|single line = Yes
|Jan record high F = 61
|Feb record high F = 64
|Mar record high F = 75
|Apr record high F = 82
|May record high F = 88
|Jun record high F = 94
|Jul record high F = 100
|Aug record high F = 100
|Sep record high F = 95
|Oct record high F = 90
|Nov record high F = 71
|Dec record high F = 60
|year record high F= 100
|Jan high F = 33.4
|Feb high F = 38.3
|Mar high F = 44.3
|Apr high F = 53.5
|May high F = 62.9
|Jun high F = 71.2
|Jul high F = 81.7
|Aug high F = 80.4
|Sep high F = 69.4
|Oct high F = 57.6
|Nov high F = 42.2
|Dec high F = 34.0
|year high F =
|Jan low F = 13.8
|Feb low F = 18.0
|Mar low F = 22.4
|Apr low F = 29.6
|May low F = 37.7
|Jun low F = 44.6
|Jul low F = 50.0
|Aug low F = 48.3
|Sep low F = 39.3
|Oct low F = 32.5
|Nov low F = 23.4
|Dec low F = 15.7
|year low F =
|Jan record low F = -70
|Feb record low F = -39
|Mar record low F = -27
|Apr record low F = -19
|May record low F = -12
|Jun record low F = 23
|Jul record low F = 31
|Aug record low F = 28
|Sep record low F = 9
|Oct record low F = -9
|Nov record low F = -34
|Dec record low F = -46
|year record low F = -70
|precipitation colour = green
|Jan precipitation mm = 20
|Feb precipitation mm = 15
|Mar precipitation mm = 30
|Apr precipitation mm = 46
|May precipitation mm = 80
|Jun precipitation mm = 80
|Jul precipitation mm = 33
|Aug precipitation mm = 43
|Sep precipitation mm = 43
|Oct precipitation mm = 28
|Nov precipitation mm = 18
|Dec precipitation mm = 23
|year precipitation mm = 459
|Jan snow inch = 12.1
|Feb snow inch = 11.1
|Mar snow inch = 13.4
|Apr snow inch = 10.5
|May snow inch = 3.6
|Jun snow inch = 0.0
|Jul snow inch = 0.0
|Aug snow inch = 0.0
|Sep snow inch = 2.3
|Oct snow inch = 3.8
|Nov snow inch = 7.6
|Dec snow inch = 12.6
|year snow inch=
|Jan precipitation days = 6
|Feb precipitation days = 5
|Mar precipitation days = 7
|Apr precipitation days = 7
|May precipitation days = 9
|Jun precipitation days = 9
|Jul precipitation days = 6
|Aug precipitation days = 6
|Sep precipitation days = 6
|Oct precipitation days = 5
|Nov precipitation days = 5
|Dec precipitation days = 6
|year precipitation days=77
|Jan snow days = 3.8
|Feb snow days = 3.9
|Mar snow days = 3.2
|Apr snow days = 1.8
|May snow days = 0.7
|Jun snow days = 0.1
|Jul snow days = 0.0
|Aug snow days = 0.0
|Sep snow days = 0.5
|Oct snow days = 1.2
|Nov snow days = 2.4
|Dec snow days = 3.4
|year snow days=21
|source 1 = Weatherbase [8]
}}

See also

  • List of mountain passes in Montana
  • List of weather records
  • A.B. Rogers
  • Lewis and Clark Pass (Montana)
  • Rogers Pass (British Columbia)

Cited references

1. ^{{cite web | url = http://www.topoquest.com/map.asp?lat=47.07639&lon=-112.36972&datum=nad27&u=4&layer=DRG&size=l&s=50| title = Rogers Pass, USGS Rogers Pass (MT) Topo Map| format = Map| work = | publisher = TopoQuest | accessdate = 2008-06-29}}
2. ^{{cite web | url = http://www.fs.fed.us/r1/flathead/wilderness/bmwcomplex.shtml| title = Bob Marshall Wilderness Complex | work =Flathead National Forest | publisher = U.S. Forest Service | accessdate = 2007-03-14}}
3. ^{{cite book|last=Spritzer|first=Dan|title=Roadside History of Montana|year=1999|publisher=Mountain Press Publishing Co.|location=Missoula, MT|isbn=0-87842-395-8 |pages=432, at p. 264}}
4. ^Biography at the Dictionary of Canadian Biography Online
5. ^{{cite web | url = http://www.wrh.noaa.gov/tfx/tx.php?wfo=tfx&type=html&loc=text&fx=topweather| title = Top Ten Montana Weather Events of the 20th Century | format = | work =National Weather Service Unveils Montana's Top Ten Weather/Water/Climate Events of the 20th Century | publisher = National Weather Service | accessdate = 2007-03-09}}
6. ^{{cite web | url = http://www.fs.fed.us/outdoors/naturewatch/Montana/wildlife/rocky-mountain-front/index.shtml| title = Rocky Mountain Front Eagle Migration Area | work = NatureWatch Viewing Sites | publisher = U.S. Forest Service | accessdate = 2007-03-11}}
7. ^Climate Summary for Rogers Pass, Montana
8. ^{{cite web|url=http://www.weatherbase.com/weather/weather.php3?s=951742&cityname=Rogers-Pass-Montana|publisher=Weatherbase|title=Weatherbase.com|year=2016|accessdate=July 27, 2016}}
{{Lewis and Clark County, Montana}}

2 : Landforms of Lewis and Clark County, Montana|Mountain passes of Montana

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