Varying spatial patterns of trend and seasonality in Eurasian runoff time series

• Main Author: R. Rödel
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2006
• Subjects: Science; Q; Geology; QE1-996.5; Dynamic and structural geology; QE500-639.5; North Atlantic; North Atlantic oscillation; Siberia
• Online Access: https://doaj.org/article/354331f648dd49b4a77c12fe0ffdebdd

Atmospheric circulation indices can be used to explain the variability of runoff on a continental scale. Beside well-known regional anomalies of precipitation and runoff that correlate with phases of the North Atlantic Oscillation (NAO) there are also drifting fields of annual discharge anomalies. Following the trend of the NAO, these fields move along a longitudinal axis from western Europe to the Lena catchment in Siberia and back again. The same pattern is observable in the changing flow regimes. This paper describes the origin and causes of these anomaly fields and explains them as the results of important climate variations in the northern hemisphere.