1. Atlantic origin of asynchronous European interdecadal hydroclimate variability.
- Author
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Zanchettin, Davide, Toniazzo, Thomas, Taricco, Carla, Rubinetti, Sara, Rubino, Angelo, and Tartaglione, Nazario
- Subjects
- *
ATMOSPHERIC circulation , *RIVERS , *OCEAN-atmosphere interaction , *CLIMATE change - Abstract
Discharge time series of major large-catchment European rivers are known to display significant decadal and interdecadal fluctuations. However, the hydroclimate variability causing such fluctuations remains poorly understood, particularly due to a lack of a spatio-temporal integrated assessment. Here, we demonstrate for the first time that European hydroclimate variability is dominated by a meridional delayed oscillation characterized by a lag of approximately 5 years in interdecadal discharge fluctuations of continental (northern) European rivers with respect to those of Euro-Mediterranean (southern) rivers. We demonstrate a connection of this coherent signal with the large-scale atmospheric circulation over the North Atlantic, and suggest a hitherto unexplored multiannual atmosphere-ocean mechanism in the subpolar North Atlantic at its root. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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