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Glacier Info - Kautz Glacier

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Kautz Glacier
Kautz Glacier is long and fairly narrow as it leads from its snout near Mildred Point to the top of Mount Rainier. The cleaver between the upper part of the Glacier and those to the east is named for Wapowety, the Indian guide of the Kautz Party on its unsuccessful attempt to climb the mountain in July of 1857. (Reese, 2009)

STATISTICS AS OF 2015 (Beason, 2017):

Aerial Extent:
0.62 ± 0.03 square miles (1.61 ± 0.08 km2) (Rank: 16 of 29)

Debris Cover:
0.13 ± 0.01 square miles (0.35 ± 0.02 km2) (Rank: 8 of 29)

Highest Elevation (Head):
14,150 feet (4,313 m)

Lowest Elevation (Terminus):
6,792 feet (2,070 m)

Elevation Range:
7,358 feet (2,243 m)

Length:
2.64 miles (4.25 km)

Average Slope:
36°

Average Flow Direction (Flows towards):
South southwest (199°)

CHANGE IN EXTENT, 1896-2015 (Beason, 2017):
Units 1896 1913 1971 1994 2009 2015
Area, mi2 2.00 0.92 0.79 0.60 0.82 0.62
Area, km2 5.17 2.37 2.05 1.56 2.13 1.61

Area change between periods
1913 1971 1994 2009 2015
1896 -1.08 mi2
(-2.80 km2)
-1.21 mi2
(-3.12 km2)
-1.40 mi2
(-3.61 km2)
-1.18 mi2
(-3.05 km2)
-1.38 mi2
(-3.56 km2)
1913 -- -0.12 mi2
(-0.32 km2)
-0.31 mi2
(-0.81 km2)
-0.10 mi2
(-0.25 km2)
-0.29 mi2
(-0.76 km2)
1971 -- -0.19 mi2
(-0.49 km2)
0.03 mi2
(0.07 km2)
-0.17 mi2
(-0.44 km2)
1994 -- 0.22 mi2
(0.57 km2)
0.02 mi2
(0.05 km2)
2009 -- -0.20 mi2
(-0.51 km2)

Percent change between periods
1913 1971 1994 2009 2015
1896 -54.1 % -60.4 % -69.9 % -58.9 % -68.9 %
1913 -- -13.6 % -34.3 % -10.4 % -32.1 %
1971 -- -24.0 % 3.6 % -21.5 %
1994 -- 36.3 % 3.3 %
2009 -- -24.2 %

ESTIMATED CHANGE IN VOLUME, 1896-2015 (George and Beason, 2017):
PLEASE see important notes about this, below...
Units 1896 1913 1971 1981* 1994 2009 2015
Volume, mi3 0.1237 0.0567 0.0490 0.0290 0.0373 0.0508 0.0385
Volume, km3 0.5157 0.2365 0.2044 0.1208 0.1554 0.2118 0.1606
* = 1981 was the only year that glacial volumes have been measured. See note below.

Basal Shear Stress (τ): 2,698.50 lbs/ft2

Volume change between periods
1913 1971 1981 1994 2009 2015
1896 -0.0670 mi3
(-0.2792 km3)
-0.0747 mi3
(-0.3113 km3)
-0.0947 mi3
(-0.3949 km3)
-0.0864 mi3
(-0.3602 km3)
-0.0729 mi3
(-0.3039 km3)
-0.0852 mi3
(-0.3551 km3)
1913 -- -0.0077 mi3
(-0.0321 km3)
-0.0278 mi3
(-0.1157 km3)
-0.0194 mi3
(-0.0810 km3)
-0.0059 mi3
(-0.0247 km3)
-0.0182 mi3
(-0.0759 km3)
1971 -- -0.0201 mi3
(-0.0836 km3)
-0.0117 mi3
(-0.0490 km3)
0.0018 mi3
(0.0074 km3)
-0.0105 mi3
(-0.0439 km3)
1981 -- 0.0083 mi3
(0.0347 km3)
0.0218 mi3
(0.0910 km3)
0.0095 mi3
(0.0398 km3)
1994 -- 0.0135 mi3
(0.0564 km3)
0.0012 mi3
(0.0051 km3)
2009 -- -0.0123 mi3
(-0.0513 km3)

Percent change between periods
1913 1971 1981 1994 2009 2015
1896 -54.1 % -60.4 % -76.6 % -69.9 % -58.9 % -68.9 %
1913 -- -13.6 % -48.9 % -34.3 % -10.4 % -32.1 %
1971 -- -40.9 % -24.0 % 3.6 % -21.5 %
1981 -- 28.7 % 75.4 % 32.9 %
1994 -- 36.3 % 3.3 %
2009 -- -24.2 %

With the exception of data in 1981, all values here are calculated estimates based on work by Driedger and Kennard (1986), which calculates glacier volumes with the following equations:

If Glacier Length (L) > 8,500 ft:


If Glacier Length (L) < 8,500 ft:


Basal shear stress (τ) is calculated as:


Where V is the calculated volume of the glacier (ft3), A is the calculated area of the glacier (ft2), ρ is the density of ice (1.779 slug/ft3), g is the acceleration of gravity (32.178 ft/s2), and α is the average slope of the glacier.

If you need a really good research project, recalculating the glacier volumes at Mount Rainier is the way to go!

NOTES:


Data References: Beason, 2017, George and Beason, 2017, Reese, 2009, and Driedger and Kennard, 1986