Geoscience Reference
In-Depth Information
Figure 6.16.
Mean annual runoff surface for the Arctic Drainage over the January
1960-December 1989 period. White areas within the southern Ob basin represent
internal drainage basins. Large areas along the Arctic Ocean coast and the Canadian
Arctic Archipelago (shown as white) are ungauged (from Lammers et al.,
2001
, by
permission of AGU). (See plate section for color version.)
complex east of James Bay, the southern Ob, the main stem of the Yenisey River,
and the lower Lena. B. Ye, D. Yang, and D. Kane (
2003
) provide a comprehensive
assessment of problems in the Lena. However, at least for annual discharge, anthro-
pogenic effects are considered to be as yet fairly minor for the Artic drainage as a
whole as compared to other parts of the world (Lammers et al.,
2001
). Some strong
impacts have been documented with respect to winter discharge.
Annual runoff is highest over the mountainous regions of central and Eastern
Siberia and along the Rocky Mountains in western Canada, the European part of
