Evidence Suggests Climate Change Is Worsening UK Winter

Evidence Suggests Climate Change Is Worsening UK Winter

Scientists at the UK Met Office say all the evidence supports the theory that the exceptionally wet and stormy winter affecting much of Britain is caused at least in part by climate change.

The British Government’s main climate science adviser, the UK Met Office, says the present exceptionally wet and stormy winter “could be a manifestation of climate change.”

Its chief scientist, Dame Julia Slingo, says the variable UK climate means there is “no definitive answer” to what is producing this winter weather, with the “most exceptional period of rainfall in 248 years”. But “all the evidence suggests there is a link to climate change”.

 

She said there was no evidence to counter what the basic science says will happen as the world warms – that heavy, fierce downpours of rain will occur more often.

    “Nobody has come forward to counter the basic premise that if you have a warmer world you are going to get more intense heavy rain rates”

Dame Julia told BBC Radio: “We know that warmer air holds more water…As scientists we always go back to the evidence base. I always challenge the climate sceptics to provide me with the same level of scientific integrity of the evidence base. I can’t see it.

“Nobody has come forward to counter the basic premise that if you have a warmer world you are going to get more intense heavy rain rates…as we’re beginning to detect now over the UK.”

The Met Office, with the UK’s Centre for Ecology & Hydrology (CEH), has published a report, The recent storms and floods in the UK, which strikes a cautious note.

grassFlooding on the Somerset Levels in the West of England: Parts have been under water for weeks Image: Nigel Mykura via Wikimedia Commons

It concludes: “It is not possible, yet, to give a definitive answer on whether climate change has been a contributor or not” to the frequent and torrential rain, storms and floods affecting much of the UK since early December.

But deep in the detail of the report’s findings are clear statements by its authors showing they are convinced that climate change may be partly responsible, despite the well-known fickle nature of the British weather.

The report says, for example, that although the number of strong winter storms over the mid-latitude North Atlantic – the path of the current storms – has not increased since 1871, the storms’ average intensity has grown significantly. The continual run of deep depressions through December, January and into February is also unusual.

    “What in the 1960s and 1970s might have been a 1 in 125 day event is now more likely to be a 1 in 85 day event”

There are questions as well about whether the jet stream “is making greater excursions north and south, and whether these waves in the jet stream are becoming more locked in one position.

“This is a critical question because it raises the possibility that disruption of our usual weather patterns may be how climate change may manifest itself.”

The report says there is now some emerging evidence that, over the United Kingdom, daily heavy rain events may be more frequent: “What in the 1960s and 1970s might have been a 1 in 125 day event is now more likely to be a 1 in 85 day event.”

It says there is an increasing body of evidence that shows that extreme daily rainfall rates are becoming more intense, and that the rate of increase is consistent with what is expected from fundamental physics. – Climate News Network

About the Author

Alex Kirby is a British journalistAlex Kirby is a British journalist specializing in environmental issues. He worked in various capacities at the British Broadcasting Corporation (BBC) for nearly 20 years and left the BBC in 1998 to work as a freelance journalist. He also provides media skills training to companies, universities and NGOs. He is also currently the environmental correspondent for BBC News Online, and hosted BBC Radio 4's environment series, Costing the Earth. He also writes for The Guardian and Climate News Network. He also writes a regular column for BBC Wildlife magazine.

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