The biological drought and growth indicator network

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We turn automatically measured stem radius changes of trees (in a micrometer resolution!) into growth patterns and drought stress indicators of forests in Switzerland and elsewhere.

Watch trees in your region growing, live! Did you know that tree stems shrink during the day and expand during the night and that trees grow mainly at night?

Drought strongly affects forest trees in Switzerland. The drought indicator tree water deficit (TWD) was slightly reduced over the weekend due to some rain. Read more …

Tree water deficits of Swiss forest trees in three different regions. Dots indicate the average TWD of the past 5 days. Bars indicate the average TWD of the past years.

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Drought 2018

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Are there growth trends since 2011?

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Are trees able to grow in periods of stem shrinkage?

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