The annual runoff of six main Eurasian rivers (km³/year) together with 7-year average (thick line) and the linear trend (dashed line).

( After Alekseyev G. V et. al., River outflow variability. Technical Report on Task 2, Grant INTAS 97-1277: Detection and Modeling of Greenhouse Warming in the Arctic and sub-Arctic. Arctic and Antarctic Research Institute, St. Petersburg, 1999.)