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Mass Balance Data, Gulkana Glacier, Alaska

**PROVISIONAL DATA--SUBJECT TO REVIEW**

Cumulative Seasonal Balances:
Graph of cummulative seasonal mass balance


Yearly Seasonal and Net Balances:

Graph of seasonol mass balances

Balance
Year
Date of
Winter
Measurement
Measured
Winter
Balance
Summer
Balance
Net
Balance
Equilibrium
Line
Altitude
AAR
(yyyy) (mm/dd/yy) (meters) (meters) (meters) (meters)  
           
1966 5/18/1966 0.95 -1.00 -0.06 1,670 0.72
1967 4/27/1967 1.12 -1.00 0.12 1,743 0.64
1968 4/30/1968 1.57 -1.61 -0.04 1,791 0.59
1969 5/25/1969 0.69 -1.60 -0.92 1,906 0.41
1970 5/10/1970 0.71 -0.25 0.46 1,664 0.72
1971 3/20/1971 1.29 -0.95 0.35 1,728 0.66
1972 5/8/1972 1.08 -1.39 -0.31 1,814 0.56
1973 5/22/1973 1.44 -0.86 0.58 1,656 0.73
1974 3/24/1974 0.55 -1.64 -1.09 1,920 0.39
1975
6/29/1975 1.12 -1.35 -0.23 1,788 0.59
1976 3/27/1976 0.96 -1.88 -0.92 1,815 0.56
1977 3/21/1977 1.39 -1.60 -0.21 1,758 0.63
1978 3/25/1978 0.98 -1.17 -0.19 1,755 0.63
1979 4/23/1979 1.35 -1.87 -0.53 1,785 0.60
1980 6/24/1980 1.13 -1.20 -0.07 1,738 0.65
1981 3/29/1981 0.96 -0.93 0.03 1,687 0.70
1982 6/20/1982 1.55 -1.67 -0.11 1,746 0.64
1983 4/25/1983 1.14 -1.11 0.03 1,751 0.63
1984 6/8/1984 1.30 -1.61 -0.32 1,768 0.61
1985 3/23/1985 1.41 -0.73 0.68 1,650 0.74
1986 3/30/1986 1.09 -1.03 0.06 1,682 0.71
1987 3/23/1987 1.24 -1.37 -0.12 1,737 0.65
1988 4/15/1988 1.26 -1.48 -0.22 1,759 0.62
1989       -0.70 1,791 0.59
1990 5/6/1990 1.36 -2.04 -0.69 1,794 0.59
1991 4/17/1991 1.31 -1.37 -0.07 1,708 0.68
1992 3/26/1992 0.98 -1.22 -0.24 1,758 0.63
1993 3/31/1993 0.82 -2.49 -1.67 1,880 0.45
1994 4/29/1994 1.37 -1.96 -0.59 1,777 0.60
1995 4/19/1995 0.94 -1.65 -0.70 1,806 0.57
1996 4/18/1996 0.87 -1.39 -0.53 1,768 0.61
1997 4/19/1997 0.99 -2.68 -1.69 1,865 0.47
1998 4/17/1998 0.79 -1.43 -0.64 1,793 0.59
1999 4/22/1999 1.04 -2.15 -1.11 1,842 0.51
2000 4/21/2000 1.44 -1.49 -0.05 1,704 0.69
2001 4/19/2001 1.40 -2.08 -0.68 1,790 0.59
2002 5/3/2002 0.76 -1.83 -1.07 1,833 0.53
2003 5/1/2003 1.79 -1.80 -0.01 1,718 0.67
2004 4/16/2004 0.93 -3.22 -2.29 1,851 0.50
2005 4/14/2005 1.73 -1.99 -.26 1,758 0.63
           
Average 04/24 1.15 -1.54 -0.40 1,769 0.61
Std.Dev. 27 0.29 0.56 0.61    65 0.08
Min 03/20 0.55 -3.22 -2.29 1,650 0.39
Max 06/29 1.79 -0.25 0.68 1,920 0.74

 

The balance year is the interval between the time of minimum glacier mass in the specified year and the time of minimum glacier mass in the previous calendar year. Typically the balance year at Gulkana Glacier starts and ends in September of each year. The balance year can be longer or shorter than a calendar year. The winter season commences at the start of the balance year in the calendar year prior to the one indicated. On average the winter balance is measured in mid-April, though it has been measured as early as March 20 and as late as June 29. All mass balance values are in meters of water equivalent. Missing data are left blank.

Data history file (for description of changes to the data on this page).


Maintainer: Rod March
Last update: Monday, December 27, 2010 05:06 PM
URL: http://ak.water.usgs.gov/glaciology/gulkana/balance/index.html