Long Series of Data
In Switzerland, several phenological events have been observed in a long tradition and recorded in long rows. Some of the more than one hundred year old series of data are presented here.
PhaenoNet è una rete di osservatori della natura e delle stagioni, che condividono le loro osservazioni su una piattaforma comune.
Gli scopi di PhaenoNet:
- Entusiasmare il maggior numero possibile di persone per l'osservazione scientifica dei fenomeni naturali stagionali.
- Studiare l'impatto dei cambiamenti climatici sui fenomeni stagionali e migliorare le previsioni polliniche.
- Aprire il dialogo fra ricerca, formazione e pubblico.
App di PhaenoNet: L'immissione e la visualizzazione dei dati da PhaenoNet avviene tramite l'app di PhaenoNet. Grazie alle moderne tecnologie, possiamo offrire ai nostri membri un'interfaccia di lavoro facile da usare, "user-friendly".
Blooming of the cherry tree in Liestal
Budbreak of the horse chestnut tree in Geneva
PhenObs: Ein globales Netzwerk Botanischer Gärten für phänologische Beobachtungen
- x-axis: year of observation
- y-axis: day of the event
- The solid line represents the smoothed data. The smoothing was done with a Bézier curve
- Since the beginning of the series of measurements, the ice on the lake usually disappeared in the second half of May (in 95 years in total).
- From 1990 onwards, however, Lake St. Moritz presented itself ice-free as early as the end of April or in the first half of May at the latest.
- The lake has only been free of the ice layer 28 times as early as April.
- Thus, the lake thaws earlier and earlier over the years.
Lake St. Moritz during thaw weather
- The observed tree in Liestal is a wild cherry tree on the edge of a forest.
- Its flowering has been repeating quite stably in April since the beginning of the measurement.
- Since the 1990s, a trend towards earlier flowering dates has been observed.
- The horse chestnut in Geneva develops its leaves much earlier today than was the case 200 years ago. When measurement began the first buds usually burst in April, today the first burst more recently in February or March.
- This trend is likely to be influenced by global warming, as well as by structural changes and stronger warming in the city of Geneva.
Bud of a Horse Chestnut in February