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MOUNT RAINIER NATURE NOTES
Vol. X October, 1932 No. 10


Glacial Recession

Each year glacial recession studies are made of some of the more prominent rivers of ice upon the slopes of Mount Rainier. Since 1918 annual records have been taken by the Educational Department staff on the Nisqually Glacier while fairly accurate historical records give us a good record of the position of the snout of this ice sheet as far as 1857, when Lieutenant A. V. Kautz made the first mention of the position of the Nisqually's ice front. The results of this data are exceedingly interesting for they give us an insight into the behavior of the best known glacier Mount Rainier.

In the fall of 1930 similar recessional measurements were begun near the snout of the Emmons Glacier, largest in continental United States, and the following year the first tabulation was made. Then to further round out this experiment, which will be culmulative and continue from year to year, points were established and base lines run at the snouts of the Carbon and South Tahoma Glaciers. These are all living glaciers - that is they move down the mountainside slowly but surely throughout the year and each is located on a different exposure upon the mountain's flanks. The first recessional measurement will be made on these last two this fall. In addition to such data it was decided to make similar studies on some dead (one that does not move downward) glacier and the Paradise Glacier, being the better known, more easily accessible and the one about which past records could most likely be obtained, was selected. Points will be placed for the first time along the edge of the ice of this glacier this fall and the first results will be computed next year after 12 months have elapsed. Recessional measurements as taken on the Nisqually Glacier this fall follow. The next issue of Nature Notes will contain results of measurements taken on the Emmons, Carbon, and South Tahoma Glaciers.

1857 to 1885 # . . . . .760 feet.
1924 to 1925 . . . . .73 feet.
1885 to 1892 . . . . .140 feet.
1925 to 1926 . . . . .86 feet.
1892 to 1918 # . . . . .1310 feet.
1926 to 1927 . . . . .43 feet.
1918 to 1919 . . . . .59 feet.
1927 to 1928 . . . . .89 feet.
1919 to 1920 . . . . .46 feet.
1928 to 1929 . . . . .52 feet.
1920 to 1921 . . . . .106 feet.
1929 to 1930 . . . . .118 feet.
1921 to 1922 . . . . .67 feet.
1930 to 1931 . . . . .49 feet.
1922 to 1932 . . . . .44 feet.
1931 to 1932 . . . . .50 feet.
1923 to 1924 . . . . .83 feet.


# - Estimated

Total recession for the years 1857 to 1932 was 3,155 feet. The average recession for this period is 42 feet per year. The average recession since actual tabulations have been taken is 68 feet per year.

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17-Nov-2001