Humans have contributed to increased global risks of drought for more than a century, scientists say, in findings that also point to "severe" consequences ahead with climate change.journal on Thursday comes as the latest Bureau of Meteorology data showed the first four months of 2019 were the hottest on record for Australia as drought tightened its grip on the country's south-east.
They found drought increased during the first half of the 20th century, eased in the quarter century to 1975 and worsened again. The pause in the trend coincided with increased aerosol pollution."Models project and observations show a re-emerging greenhouse gas signal towards the end of the 20th century, and this signal is likely to grow stronger in the next several decades," the paper concluded.
Andrew King, climate extremes research fellow at the ARC Centre of Excellence for Climate System Science, said while heat extremes caused by climate change have been clear, "droughts are very complicated", with natural variability masking the trends, Dr King said. Day-time readings, for instance, beat the previous record set only a year earlier by almost half a degree, coming in at 1.93 degrees above the 1961-90 average.Regions such as the Murray-Darling Basin were also the hottest on record for mean temperatures, with rainfall this year slightly below half the norm - although rains later this week should help.Sydney is tracking the hottest on record for daytime temperatures - averaging 27.2 degrees so far in 2019, or 2.4 degrees above average.
p_hannam coastal erosion can be mitigated by honey comb sea wall like Dubai Hotel
p_hannam Bullbadash, geoengineering is used for weather modification which creates drought, also used to seed clouds for rain, you're just ignorant to it's existence, unlike abcnews who report on it. This should be an election issue. agchat agchatoz auspol
p_hannam Surprise surprise 😂😂
p_hannam Its called the weather Einstein. Be changing for a while.A billion years or so.Measuring that with a microscope and deluding yourself that it can be changed is the foundation of a cult sweeping the world.Nothing good can actually come of it,but you know that.
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