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Temperature totals

The temperature sum (also heat sum) is a statistical key figure from meteorology. It can be used to compare different regions or years on the basis of temperatures. The growth and development of plants, insects and other invertebrates depends largely on the ambient temperature. Many of these organisms slow down or block their growth and development when temperatures rise or fall above or below certain thresholds. All plants require a certain individual temperature sum to be ready for flowering. The accumulation of thermal energy over a certain period of time is called growing degree days or temperature sums (heat sums). All daily averages added together give the temperature sum.

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Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)

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