Lower Curtis Glacier

Lower Curtis Glacier is in North Cascades National Park in the U.S. state of Washington. Named for photographer Asahel Curtis,^[2] the glacier is in a cirque on the western slopes of Mount Shuksan.^[3] Lower Curtis Glacier is rapidly retreating and has a negative mass balance, meaning that the rate of snow and ice that is falling in the accumulation zone is less than that which is lost each year in the ablation zone. Between 1908 and 1984, the glacier experienced a loss of thickness by 45 meters (147 ft). Between 1984 and 2002, the glacier lost another 6 meters (19 ft) in thickness. Lower Curtis Glacier also lost 28% of its surface area between the end of the little ice age (around 1850) and 1950. Between the years 1951 and 1979, the glacier actually lengthened by 245 meters (800 ft) but has retreated 184 m (600 ft) since 1985, partly due to the tongue of the glacier being on a steep precipice which may have increased the loss of ice at the termini.^[4]

Lower Curtis Glacier
Lower Curtis Glacier showing glacial retreat documented between 1985 and 2003
Lower Curtis Glacier
Type	Mountain glacier
Location	North Cascades National Park, Whatcom County, Washington, USA
Coordinates	48°49′24″N 121°37′17″W[1]
Area	.8 km2 (0.31 sq mi)
Terminus	cliffs
Status	retreating

See also

• List of glaciers in the United States

References

1. "Lower Curtis Glacier". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved August 25, 2012.
2. Majors, Harry M. (1975). Exploring Washington. Van Winkle Publishing Co. p. 30. ISBN 978-0-918664-00-6.
3. Mount Shuksan, WA (Map). TopoQwest (United States Geological Survey Maps). Retrieved August 25, 2012.
4. Pelto, Mauri (2003). "Change in North Cascade Glacier Retreat". 60th Eastern Snow Conference. Sherbrooke, Québec, Canada. pp. 89–96. Archived from the original on October 22, 2012. Retrieved October 23, 2008.