Table 3 Glacier specifications.

From: CH4 emissions from runoff water of Alaskan mountain glaciers

Glacier

Area (km2)

Length (km)

Elevation range (m)

Average slope angle

Type

Lon, Lat

Geology

Gulkana

17.567

8.6

1341–2120

14°

Clean

145.43 W,

63.257 N

Metamorphic, volcanic, and sedimentary

Canwell

59.601

23.5

808–2734

14°

Debris covered

145.62 W,

63.379 N

Schist and phyllite

Castner

53.795

19.6

787–2941

17°

Debris covered

145.69 W,

63.406 N

Schist and phyllite

Matanuska

308.689

43.2

1744–1837

16°

Clean

147.75 W,

61.773 N

Accretionary complex (sandstone and shales)

  1. Geographical information for the glaciers is obtained from the Randolph Glacier Inventory26,27. Castner and Canwell Glaciers are covered with debris in the ablation area and are classified by the authors as “debris covered”. Observation points are given in longitude and latitude. Geological information is taken from the USGS geological map19.
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