After the soggiest week in two years and the wettest month since 2007, the sun returns. Rosehill Races were back on Monday after the wet weather. Photo: Steven SiewertWet parts of the globe will face even heavier rainfall if greenhouse gas emissions continue to rise and air pollutants continue to be reduced, a study has found.
The British study used climate-model simulations to examine the global hydrological cycle between the 1950s and 1980s. It found increased atmospheric aerosols were linked to a weakening global water cycle.
The researchers concluded the impact of climate change on the world’s water cycle would become increasingly evident over time, as aerosols were phased out.
Lead researcher Peili Wu, from the British Met Office, said a warming world would normally result in increased rainfall and river discharge, but human pollutants and aerosols had been masking the effects of increased atmospheric concentrations of carbon dioxide. He said that as air pollutants reduced, the true impact would become clear.
”We know that precipitation isn’t increasing as we had been predicting,” Steven Siems, from Monash University’s weather and climate group, said. ”But this [study] has included the effect of aerosols in the models and all of a sudden precipitation predictions behave better.”
Professor Siems said as the Earth warmed, more vapour could be held in the air. It meant there was more moisture available to fall as rain when a storm developed.
The research, which was published in the journal Nature Climate Change, was said to take better account of the impact of aerosols on the water cycle than previous weather studies.
This story Administrator ready to work first appeared on Nanjing Night Net.