Study On Natural Phenology And Climate Change In Zhejiang Province

Phonological information was an important class of spatial-temponal data to study climate change, whose seasonality and locality was very obvious. Currently, the climate change was global concerned, particularly the effects of climate changing for plant phenology, which was one of research focus on phenology and climatology. It was the important denotative meaning for revealing environmental change.I utilized the natural climate observation data from the year of 1980 to 2007 in Zhejiang province. After those papery data being electronized, phenological information database was established. I calculated the average of each phenological phase with VBA program. Then I analysed phenology distribution regularities of woody, herbaceous and animal, and selected the representative woody plant of willow and sweet osmanthus tree to analyse phenology distribution. At the same time, I utilized phenological data and climate data over the same period to do correlation analysis for meteorological factors and first Leaf expansion dates and first-flowering dates of willow, orange, plantain and reed. Meteorological factors included the daily average temperature, sunshine hours, active accumulated temperature(≥10℃), precipitation and humidity. The results showed that , the spring phennological phase of plants was brought forward, autumn andwinter phennological phase postponed, and the growing season extended; the phenology of annual differences were significant; the spring phennological phase of plants were postponed along middle land to southeast coast to north land in Zhejiang. Autumn and winter phennological phase postponed from north to south. Phenology fluctuations, temperature variation and interannual variation were generally consistent. In addition, temperature was the dominant factor to affect the plant phenology; sunshine and the accumulated temperature (≥10℃) were subordinate factor; precipitation and humidity were minimal impact factor. Temperature, sunlight and the accumulated temperature increased would urge plant phenology to be brought forward; precipitation and humidity increased would impact of plant phenology postponed.