These PD–NAT variations reflect circulation-related changes in the base state that alter the effect of thermodynamic forcing.
Evidence (2)
European summer drying largely driven by atmospheric circulation changes since the 1980s — Dynamic warm and dry conditions amplify thermodynamic drying
Variations in these differences reflect how changes in the base state associated with circulation variability influence the effect of thermodynamic forcing.
https://doi.org/10.1038/s41561-026-02050-w#unit-5-p2
European summer drying largely driven by atmospheric circulation changes since the 1980s — Dynamic warm and dry conditions amplify thermodynamic drying
Variations in these differences reflect how changes in the base state associated with circulation variability influence the effect of thermodynamic forcing. Focusing on two key metrics of European drying, soil moisture and VPD, we find a strong relationship between the dynamical conditions during a summer season and the thermodynamic component: the thermodynamic drying signal is stronger under circulation-induced warm and dry conditions.
https://doi.org/10.1038/s41561-026-02050-w#unit-5-p2
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