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Winter precipitation is the major source of tree transpiration in summer
Interception and evaporation limit the amount of summer precipitation reaching forest soils. As a result, beech and spruce trees are dominantly transpiring precipitation originating from the winter half of the year. Sufficient soil water storage is key during extended summer dry periods.
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Sophie Valeria Graf
Dep. Umweltsystemwissenschaften
Universitätstrasse 16
8092
Zürich
Switzerland