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Mass Balance Data, Gulkana Glacier, Alaska
**PROVISIONAL DATA--SUBJECT TO REVIEW**
Cumulative Seasonal Balances:
Yearly
Seasonal and Net 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 |
|
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:
Friday, March 16, 2007 05:16 PM
URL: http://ak.water.usgs.gov/glaciology/gulkana/balance/index.html
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