Climate change linked to rise in excess rainfall
The rise of rainfall events setting ever new records in the past 30 years is linked to rising global temperatures which are caused by greenhouse-gas...
London: The rise of rainfall events setting ever new records in the past 30 years is linked to rising global temperatures which are caused by greenhouse-gas emissions from burning fossil fuels, says a new study. An advanced statistical analysis of rainfall data from the years 1901 to 2010 derived from thousands of weather stations across the globe show that over 1980-2010 there were 12 per cent more of these events than expected in a stationary climate, a scenario without global warming.
While before 1980, multi-decadal fluctuations in extreme rainfall events are explained by natural variability, the researchers detected a clear upward trend in the past few decades towards more unprecedented daily rainfall events due to the global warming.
The record-breaking anomaly has distinct patterns across Earth's continents with generally wet regions seeing an over-proportional increase and drier regions less so. In contrast, some regions experienced a significant decrease of record-breaking daily rainfall events. In the Mediterranean, the reduction is 27 per cent, and in the Western US 21 per cent. Both regions are at the risk of severe droughts.