Drought legacies delay spring green up in northern ecosystems

This version of the code is including four parts:<br>(1) <code>phenology_extraction</code> for retrieving plant phenological phases,<br>(2) <code>drought_identification</code> for detecting drought events,<br>(3) <code>drought_legacy</code> for assessing legacy effects of drought on spring phenology, and<br>(4) <code>drought_legacy_analysis</code> for investigating underlying mechanisms using Random Forest (RF) and Structural Equation Modeling (SEM).<br>For further details, please contact [e-mail].