08/11/2010

Met Office 'Hail' Weather Breakthrough

Be it rain, hail or snow, a major breakthrough in forecasting the impact and number of Atlantic tropical storms has been achieved, said Met Office scientists today.

New research, published on Nature Geoscience web site today, revealed that the Decadal Climate Prediction System (DePreSys), developed at the Met Office, extends successful storm activity forecasts beyond the current season, providing predictions years ahead.

"Being able to predict hurricane frequency well beyond the seasonal timescale represents a real step-change in capability", said Matt Huddleston, Principle Climate Consultant at the Met Office.

"Tropical storms present arguably the most destructive weather on the planet. Being able to reliably predict how many storms may occur over a number of years means increased confidence in making strategic plans. Armed with such information, financial and energy sectors will have a genuine advantage."

Willis Research Network says the research has serious implications for the way insurers assess risk, allocate capital and strategically manage their portfolios going forward.

There is a strong link between the environmental factors in the tropical Atlantic that affect hurricane formation and remote ocean conditions in the north Atlantic and the tropical Pacific.

Doug Smith, the paper's lead author and Met Office specialist in decadal forecasting, said: "Our study is important for understanding the mechanisms of multi-year hurricane variability, and shows that forecasting hurricane activity beyond a single year is viable using dynamical computer models."

The study has also examined the recent increase in Atlantic hurricane activity and concluded this was not exclusively linked to natural fluctuations of ocean temperature. Looking forward, Dr Smith said: "This opens the door for further research to determine the relative importance of the different factors, be these greenhouse gases, aerosols, volcanic eruptions or solar activity."

(BMcC/KMcA)

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