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

• Main Author: Rödel, R.
• Other Authors: Institute for Geography and Geology
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2006
• Subjects: [SDU.STU]Sciences of the Universe [physics]/Earth Sciences; North Atlantic; North Atlantic oscillation; Siberia
• Online Access: https://hal.science/hal-00296961; https://hal.science/hal-00296961/document; https://hal.science/hal-00296961/file/adgeo-9-93-2006.pdf

International audience 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.