By Gloria Dickie LONDON (Reuters) – Flooding cost the global economy more than $82 billion last year, accounting for nearly a third of all losses from natural catastrophes, reinsurance agency Swiss Re Institute reported Wednesday. In some parts of Europe, such losses could climb. A new study in the journal Nature found that stormy seas around Scotland and northern England have unleashed an increasing number of extreme storm surges in recent decades. “Floods affect nearly a third of the world population, more than any other peril,” said Martin Bertogg, head of catastrophe perils at Swiss Re, in…