Extreme weather link 'can no longer be ignored' - Science, News - The Independent
Scientists are to end their 20-year reluctance to link climate change with extreme weather – the heavy storms, floods and droughts which often fill news bulletins – as part of a radical departure from a previous equivocal position that many now see as increasingly untenable.
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Climate researchers from Britain, the United States and other parts of the world have formed a new international alliance that aims to investigate exceptional weather events to see whether they can be attributable to global warming caused by greenhouse gas emissions.
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[Warmist Kevin Trenberth] “We have this extra water vapour lurking around waiting for storms to develop and then there is more moisture as well as heat that is available for these storms [to form]. The models suggest it is going to get drier in the subtropics, wetter in the monsoon trough and wetter at higher latitudes. This is the pattern we're already seeing.”
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“There is strong evidence if you look across the world that we are seeing an increase in heatwaves and floods and droughts and extreme rainfall and extreme temperatures,” Dr Stott said.
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[Trenberth] “It’s not so much the instantaneous result of the greenhouse effect, it’s the memory of the system and the main memory is in the oceans and the oceans have warmed up substantially, at depth, and we can measure that. I will assert that every event has been changed by climate change and the main time we perceive it is when we find ourselves outside the realms of the previous natural variability, and because natural variability is so large this is why we don't notice it most of the time.
“When we have things that occur usually 4 per cent of the time start to occur 10 per cent of the time, that’s when we begin to notice. The main way we perceive climate change is in changes in the extremes? this is when we break records.”
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Floods, USA, 2005 Katrina was one of the five deadliest hurricanes in the history of the US, and it caused the destruction of New Orleans when levees were overwhelmed.
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