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Early spring time for Edinburgh? Study predicts effect of global warming on spring flowers
Date:9/11/2009

Will we soon see the flowers of Edinburgh in full bloom in the depths of winter? This possibility is considered in a new study into the impact of global warming on spring flowering, published today in the International Journal of Climatology. Data, taken from records dating back to the late nineteenth century, has been used to demonstrate the impact of global warming and to predict the effect further warming will have on plant life by the year 2080.

The study, by Dr Malcolm Clark and Prof Roy Thompson, is based on the facts that plants control the timing of flowering by adapting to the local weather and climate and that throughout the past century global warming, driven by ever rising atmospheric carbon dioxide concentrations, has resulted in local climate changes which are likely to steadily increase.

"Already there is a great deal of observational evidence of regional changes in climate associated with global warming," said Clark. "We have not only seen an earlier break up of ice on rivers and melting glaciers, but also the early emergence of insects, egg laying by birds and the flowering of plants. This new model allows us to refine predictions of the future impact of warming on plant and animal life across much of the world."

Clark and Thompson worked from a wealth of old records from the Royal Botanic Garden Edinburgh, which started in 1850. They also analysed records of Edinburgh's climate from records dating back to 1775. With this information they investigated the responses of 79 species of plant to air temperatures.

Using this data Thompson and Clark establish the relationship between air temperature and first flowering date and have used their new statistical model to predict likely changes in spring flowering in Scotland based on three potential global warming scenarios. For every 1 o C that the climate warms they predict that spring flowering will begin approximately 11 days earlier. For an increasingly
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Contact: Ben Norman
Benorman@wiley.com
44-124-377-0375
Wiley-Blackwell
Source:Eurekalert

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