Heavy rain in Britain due to global warming: Scientists
LONDON, July 24 (Xinhua): A major new scientific study reveals the heavier rainfall in Britain is being caused by climate change as the country reels from summer downpours of unprecedented ferocity.
More intense rainstorms across parts of the northern hemisphere are being generated by man-made global warming, the local daily The Independent reported Monday, quoting the study which has established for the first time an effect which has long been predicted but never before proved.
The new study was carried out jointly by several national climate research institutes using their supercomputer climate models, including the Hadley Center of the UK MeT Office.
The study does not prove that any one event, including the rain of the past few days in Britain, is climate-change related, but it certainly supports the idea, by showing that in recent decades rainfall has increased over several areas of the world, including the mid-latitudes of the northern hemisphere, and linking this directly, for the first time, to global warming caused by human emissions of greenhouse gases, the report said.
The computer models used to predict the future course of global warming all show heavier rainfall, and indeed, "extreme rainfall event," is one of its principal consequences, it said.
Lead scientist, Peter Stott, at the Hadley Centre, involved with the study specializes in finding "human fingerprints" sometimes referred to as anthropogenic signals on the changing climate, according to the report.
The human fingerprint is detected by making computer simulations of the recent past climate, with and without emissions of greenhouse gases and then comparing the results with what has actually been observed in the real world.
Stott published research last September showing that the climate of central England had warmed by a full degree Celsius in the past 40 years, and that this could be directly linked to human causes the first time that man-made climate change had been identified at such a local level.
Global warming is likely to lead to higher rainfall because a warming atmosphere contains more water vapour and more energy, according to the study.
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