RECENT DYNAMICS OF SUB-ARCTIC DUNES AS DETERMINED BY TREE-RING ANALYSIS OF WHITE SPRUCE, HUDSON-BAY, QUEBEC

被引：28

作者：

MARIN, P ^{[1
]}

FILION, L ^{[1
]}

机构：

[1] UNIV LAVAL,DEPT GEOG,QUEBEC CITY G1K 7P4,QUEBEC,CANADA

来源：

QUATERNARY RESEARCH | 1992年 / 38卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0033-5894(92)90041-G

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

The radial-growth patterns of white spruce were studied on a number of trees growing in subarctic dunes along the eastern coast of Hudson Bay to calculate the rates of accumulation, erosion, and migration of cold-climate sand dunes. The average rate of sand accumulation in sheltered dunes (forest sites) was 2.5 to 3.3 cm/yr, which is two to three times lower than in highly exposed dunes with a rate of sedimentation of 7.65 cm/yr. The average erosion rate was 1.4-1.7 cm/yr, about two times lower than the accumulation rate. The migration rate of sheltered dunes was 18 to 30 cm/yr, three to five times lower than for an exposed dune which advanced at a speed of 74 cm/yr. This migration rate established for highly exposed dunes in the Subarctic with tree-ring methods is about 10 times lower than that established for a barchan in the Sahara with other methods. © 1992.

引用

页码：316 / 330

页数：15

共 51 条

[1] DISTINCTIVE SEDIMENTARY FEATURES OF COLD-CLIMATE EOLIAN DEPOSITS, NORTH PARK, COLORADO [J].