摘要：Aggregate annual discharge from the six largest Arctic-draining Eurasian rivers achieved an
all-time record high in 2007, accentuating a long-term upward trend that argues for
intensification of the Arctic hydrologic cycle. This record discharge was due in part to
strong positive anomalies in late winter snow water equivalent across much of northern
Eurasia. These anomalies arose in response to an unusual pattern of atmospheric
circulation in late 2006 and early 2007, characterized by an extreme northeastward
extension of the Icelandic Low and a contraction of the Siberian High. Positive
net precipitation anomalies then continued into summer, further contributing to
discharge.
