Climate Extremes in the UK: The impacts for business Professor Stephen Belcher Head of Met Office Hadley Centre © Crown copyright Met Office The climate is changing Is the world warming? Changes in the atmosphere, cryosphere and ocean show unequivocally that the world is warming Is it due to human activity? It is extremely likely (95% certainty) that human influence is responsible for more than half of the warming since 1950 What does it mean for us in the UK? What can we say about climate events in UK? © Crown copyright Met Office UK Extremes: Too hot Summer 2003 Temperatures • UKCP09: On average summers become hotter & drier • Heat waves in large parts of Europe are likely to have increased since 1950 NASA • Climate change doubled risk of temperatures seen in Europe in 2003 • Continuing on track for 2003 to be norm in Europe by 2040s Summer 2003 Impacts: • 2,000 excess UK deaths • Strain on infrastructure • Crop failure and livestock death • Transport network disruption • Closure of nuclear power plants • Increased UK tourism © Crown copyright Met Office Met Office UK Extremes: Too cold • UKCP09: On average winters warmer and wetter • But, large natural fluctuations in UK climate: location of jetstream • 20-30% chance of cold winters until 2020s • Need to adapt to broader envelope Winter 2010/11 Impacts: • Strain on emergency services • Transport networks and utilities impacted • Closure of Heathrow for 2 days • Retail industry affected • Reduced GDP by ~0.5% © Crown copyright Met Office More warm winters but natural variability means still have cold winters UK Extremes: Too wet • Human influence on heavier rainfall has been detected around world • Evidence that heavy downpours increase more rapidly in warmer temperatures Expect more intense rainfall • Large natural fluctuations in UK summer rainfall accumulation • 35% chance of wet summer until 2040s Winter 2013/14 Impacts: • 6000 properties flooded • Transport networks disrupted • Agriculture and livestock impacted • Coastal erosion • Power losses © Crown copyright Met Office Wet summers continue due to climate natural variability UK Extremes: Too dry • UKCP09: On average summers hotter and drier • No clear evidence of climate change on dry seasons in the UK • UK experiences impacts through economic and trade links: Texas heat wave © Crown copyright Met Office Hotter, drier summers Summary • Climate is changing • Probability of some extreme events increases • Heat waves, heavy rainfall events, coastal flooding • Must be seen in context of UK’s natural variability: • Multi-decadal variability in summer rainfall • Oscillations in winter jet stream position: keep cold winters • Need to be resilient to broader range of conditions • Climate Services to help detect vulnerability and plan resilience © Crown copyright Met Office “The Met Office Hadley Centre…represents a critical national capability with a central role of meeting the Government’s requirements for climate evidence and advice” Sir John Beddington GCSA