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Glacier Info - Success Glacier

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Success Glacier
This glacier is on the northwest arm of the Kautz Glacier. It is divided from the South Tahoma Glacier by Success Cleaver and is below Point Success. See: Success Cleaver. (Reese, 2009)

STATISTICS AS OF 2015 (Beason, 2017):

Aerial Extent:
0.18 ± 0.01 square miles (0.47 ± 0.02 km2) (Rank: 23 of 29)

Debris Cover:
0.03 ± 0.00 square miles (0.08 ± 0.01 km2) (Rank: 4 of 29)

Highest Elevation (Head):
10,576 feet (3,224 m)

Lowest Elevation (Terminus):
8,432 feet (2,570 m)

Elevation Range:
2,144 feet (653 m)

Length:
0.74 miles (1.19 km)

Average Slope:
31°

Average Flow Direction (Flows towards):
South southwest (192°)

CHANGE IN EXTENT, 1896-2015 (Beason, 2017):
Units 1896 1913 1971 1994 2009 2015
Area, mi2 -- 0.25 0.26 0.25 -- 0.18
Area, km2 -- 0.66 0.68 0.64 -- 0.47

Area change between periods
1913 1971 1994 2009 2015
1896 0.25 mi2
(0.66 km2)
0.26 mi2
(0.68 km2)
0.25 mi2
(0.64 km2)
0.00 mi2
(0.00 km2)
0.18 mi2
(0.47 km2)
1913 -- 0.01 mi2
(0.02 km2)
-0.01 mi2
(-0.01 km2)
-0.25 mi2
(-0.66 km2)
-0.07 mi2
(-0.19 km2)
1971 -- -0.01 mi2
(-0.04 km2)
-0.26 mi2
(-0.68 km2)
-0.08 mi2
(-0.21 km2)
1994 -- -0.25 mi2
(-0.64 km2)
-0.07 mi2
(-0.17 km2)
2009 -- 0.18 mi2
(0.47 km2)

Percent change between periods
1913 1971 1994 2009 2015
1896 -65,374.9 % -67,542.6 % -63,973.2 % 0.0 % -46,897.8 %
1913 -- 3.3 % -2.1 % -100.2 % -28.3 %
1971 -- -5.3 % -100.1 % -30.6 %
1994 -- -100.2 % -26.7 %
2009 -- -46,897.8 %

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 -- 0.0107 0.0111 0.0111 0.0104 -- 0.0074
Volume, km3 -- 0.0445 0.0462 0.0465 0.0435 -- 0.0306
* = 1981 was the only year that glacial volumes have been measured. See note below.

Basal Shear Stress (τ): 2,354.77 lbs/ft2

Volume change between periods
1913 1971 1981 1994 2009 2015
1896 0.0107 mi3
(0.0446 km3)
0.0111 mi3
(0.0462 km3)
0.0111 mi3
(0.0465 km3)
0.0104 mi3
(0.0435 km3)
0.0000 mi3
(0.0000 km3)
0.0074 mi3
(0.0306 km3)
1913 -- 0.0004 mi3
(0.0017 km3)
0.0005 mi3
(0.0019 km3)
-0.0003 mi3
(-0.0011 km3)
-0.0107 mi3
(-0.0446 km3)
-0.0033 mi3
(-0.0139 km3)
1971 -- 0.0001 mi3
(0.0002 km3)
-0.0007 mi3
(-0.0027 km3)
-0.0111 mi3
(-0.0462 km3)
-0.0037 mi3
(-0.0156 km3)
1981 -- -0.0007 mi3
(-0.0030 km3)
-0.0111 mi3
(-0.0465 km3)
-0.0038 mi3
(-0.0158 km3)
1994 -- -0.0104 mi3
(-0.0435 km3)
-0.0031 mi3
(-0.0128 km3)
2009 -- 0.0074 mi3
(0.0306 km3)

Percent change between periods
1913 1971 1981 1994 2009 2015
1896 -4,455,085.7 % -4,621,715.5 % -4,645,100.0 % -4,347,700.9 % 0.0 % -3,064,922.8 %
1913 -- 3.7 % 4.3 % -2.4 % -100.0 % -31.2 %
1971 -- 0.5 % -5.9 % -100.0 % -33.7 %
1981 -- -6.4 % -100.0 % -34.0 %
1994 -- -100.0 % -29.5 %
2009 -- -3,064,922.8 %

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:
This glacier flows into the Kautz Glacier. Extent of this glacier in 1896 and 2009 was included with the combined Kautz/Success Glacier system. See Kautz Glacier for extent change over time.

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