Meteorologischer und phänologischer Jahresrückblick 2006 | Meteorological and phenological annual review for 2006

The year 2006 was characterised by a cold winter in 2005/2006 and by high temperatures during the summer and autumn of that year. Among others, these characteristics had an effect on the development of vegetation,as the beginning of the vegetation period was very late. Only the warm temperatures during April and May could make up the initial delay of the vegetation period and the high temperatures during June and July (the hottest July on record) led to the phenological summer phases beginning on time. Temperatures were also extremely high during the autumn. This may have been the reason why the phenological autumn phases, such as the leaf fall of beech, were observed relatively late. The repeated flowering and greening of the chestnut tree in Geneva can be described as a unique phenomenon.