Nisqually Glacier

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Nisqually Glacier
Mount Rainier and the Nisqually Glacier from the Skyline Trail above Paradise (6 October 2024).jpg
Nisqually Glacier in center background from above Paradise, October 2024
TypeMountain glacier
Location Mount Rainier National Park, Pierce County, Washington, USA
Coordinates 46°50′05″N121°44′47″W / 46.83472°N 121.74639°W / 46.83472; -121.74639
Area1.8 sq mi (4.7 km2) in 1983 [1]
Length4 mi (6.4 km)
Terminusmoraine
StatusRetreating [1]

The Nisqually Glacier is one of the larger glaciers on the southwestern face of Mount Rainier in the U.S. state of Washington. The glacier is one of the most easily viewed on the mountain, and is accessible from the Paradise visitor facilities in Mount Rainier National Park. Nisqually Glacier is the source of the Nisqually River. [1]

Contents

Perhaps the longest studied glacier on Mount Rainier, Nisqually's terminal point has been measured annually since 1918. [2] In May 1970, the glacier was measured to be moving at an average of 29 inches (740 mm) per day. [3] Between 1896 and 2021, the glacier shrank from 3.871 square miles (10.03 km2) to 1.584 square miles (4.10 km2). [4]

Nisqually Glacier from Glacier Vista From Glacier Vista. (c454ad05ceed49cbbf306aacd725a8e7).JPG
Nisqually Glacier from Glacier Vista

Development

Nisqually Glacier has advanced and retreated three times during the end of the 20th Century. The recent retreat began in 1985. In the next six years, the glacier thinned by 52 feet (16 m) west of Glacier Vista. [5]

The glacier reached its greatest extent by 1850, when many of the glaciers reached their furthest extent down valley. The 1850s is considered the Little Ice Age. Nisqually Glacier reached 650 to 800 feet (200 to 240 m) feet below the Glacier Bridge. On the west, Tahoma and South Tahoma Glaciers joined below Glacier Island along the Wonderland Trail. Emmons Glacier on the northeast reached within 1.2 miles (1.9 km) of the White River Campground. [5]

With the end of the Little Ice Age these glaciers began a slow retreat. After 1920 the rate of shrinkage sped up. In the 100 years since the height of the Little Ice Age and 1950, Mount Rainier lost about one-quarter its glaciers. After 1950 until the 1980s the larger glaciers made small advances. Since the 1980s, many glaciers have been thinning and retreating. [5]

Debris flows

The glacier is one of four on Mount Rainier that are known to have released debris flows. Similar flows have stemmed from the Winthrop, Kautz, and South Tahoma glaciers as well. [1]

See also

Bibliography

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<span class="mw-page-title-main">Emmons Glacier</span> Glacier in Washington, United States

Emmons Glacier is on the northeast flank of Mount Rainier, in Washington. At 4.3 sq mi (11 km2), it has the largest surface area of any glacier in the contiguous United States. The glacier was named after the geologist Samuel Franklin Emmons after his involvement in a survey of Mount Rainier in 1870.

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<span class="mw-page-title-main">Kautz Glacier</span> Glacier in the United States

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<span class="mw-page-title-main">Glacial Lake Russell</span> Glacial lake (former) in Thurston County, Washington

During the Vashon Glaciation a series of lakes formed along the southern margin of the Cordilleran Ice Cap. In the Puget Sound depression, a series of lakes developed, of which Lake Russell was the largest and the longest lasting. Early Lake Russell’s surface was at 160 ft (49 m) above sea level, draining across the divide at Shelton, Washington into early Glacial Lake Russell. When the ice margin receded northward, the lake expanded. When it reached the Clifton channel outlet, the water levels dropped to 120 ft (37 m) above sea level. The new longer and lower level lake is referred to as Lake Hood. The glacier continued to retreat until the northern outlet of the Hood Canal was reached as the water level equalized with Glacial Lake Russell becoming part of that body of water.

<span class="mw-page-title-main">Lake Puyallup</span> Glacial lake (former) in Pierce County, Washington

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<span class="mw-page-title-main">Tumtum Peak</span> Mountain in Washington (state), United States

Tumtum Peak is a 4,678-foot-elevation (1,426-meter) mountain summit located in the southwest corner of Mount Rainier National Park, in Pierce County of Washington state. This top-to-bottom forested peak is part of the Cascade Range and lies 8.7 mi (14.0 km) southwest of the summit of Mount Rainier. The nearest higher neighbor is Mount Wow, 2.2 mi (3.5 km) to the northwest, and Iron Mountain rises 3.56 mi (5.73 km) to the northeast. Precipitation runoff from Tumtum Peak is drained by Tahoma Creek on the west side of the mountain, whereas Kautz Creek drains the east side, and both are tributaries of the Nisqually River. The Road to Paradise traverses the southern base of the peak shortly after visitors to the park enter via the Nisqually Entrance. Topographic relief is significant as the southwest aspect rises nearly 2,500 feet above the road in one mile.

<span class="mw-page-title-main">Timeline of Mount Rainier expeditions</span> From 1836 to 1899

Mount Rainier is a stratovolcano within the Cascade Range of the Pacific Northwest. The mountain is within modern-day Washington state, 59 miles south south-east of Seattle. Mt. Rainier is the tallest mountain in the Cascade Range, the fifth tallest in the contiguous 48, and the most prominent peak in the contiguous 48. The peak can be seen from approximately 150 miles away. It is classified as an active volcano with the last eruptions occurring between 1894 and 1895. Mt. Rainier has a height of 14,410 ft and a prominence of 13,246 ft.

References

  1. 1 2 3 4 "DESCRIPTION: Mount Rainier Glaciers and Glaciations - Mount Rainier Glacier Hazards and Glacial Outburst Floods". USGS. Retrieved 2007-11-19.
  2. "Ice Volumes on Cascade Volcanoes". Geological Survey Professional Paper 1365. United States Geological Survey. March 28, 2006. Retrieved 2007-01-11.
  3. "Glaciers on Mount Rainier". Glaciers. National Park Service. May 6, 2004. Retrieved 2007-01-11.
  4. "morageology.com :: Glacier Info - Nisqually Glacier". www.morageology.com.
  5. 1 2 3 Glaciers on Mount Rainier; C.L. Driedger; Glaciers on Mount Rainier; U.S. Geological Survey, Department of the Interior, Washington, D.C,; 1993