Fig. 4.

Contribution of labeled deep soil water and water from overlying soil to transpired water of investigated trees. The temporal delay of label signal arrival varied between individuals and was up to 10 days in case of PA4. For presented uptake percentage plots we moved transpiration time series backwards in order to represent temporal dynamics at the location of root water uptake. Vertical dashed lines indicate first and last day of deep labeling (dark blue) and first and second post-drought rain (light blue).