Summary/Abstract
This study looks at the risk of tree stress caused by periods of hot drought and late-spring frost. The authors used monthly climate projections to “calculate the standardised precipitation and evapotranspiration index (SPEI) and bias corrected daily temperature projections were used to calculate a frost buffer of the number of days between last date of spring frost and the date of leafing of Norway spruce.” The results showed that “substantial changes in the distribution of SPEI likelihood and severity between the pseudo-global warming threshold temperatures of 10C and 20C indicat[es] concern in relation to drought severity and frequency in Alpine, Atlantic, and Mediterranean biogeographic regions.”