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2018 drought wilted about 11% of Central European forests
The 2018 heat-and-drought summer triggered early wilting on about 11% of Central European forest area, worst in Germany and Czechia, with greening still reduced the next spring.
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What extreme event hit Central European forests in summer 2018?
Record drought and heat wave, exceeding even 2003.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
What fraction of mapped forest showed early wilting?
About 11%.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
How large was the wilted area?
About 21,524 km², or 10.8% of forested area.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
Where was early wilting most versus least prevalent?
Highest in central/eastern Germany and Czechia; lowest around the Alps.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
Which 2018 climate anomalies ranked as critical drivers?
Precipitation (negative) and temperature (positive) anomalies.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
How well did the random-forest classifier perform?
Overall accuracy about 0.90.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
What training data fed the classifier?
Visual orthophoto labels (>300,000 pixels) plus NDVI time-series features.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
Did wilted forests fully recover greenness by spring 2019?
No—affected patches showed reduced greenness versus 2018.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
How much did the wilted–healthy NDVI gap grow by May/June 2019?
The difference increased by 0.015.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
How much deviance did Central European-scale drivers explain?
About 35% at 500 m grain.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified
What following-spring question did they ask?
Whether 2019 May/June NDVI stayed depressed in 2018-wilted pixels.
Source: Large-scale early-wilting response of Central European forests to the 2018 extreme drought · DOI · quote verified