Another top-10 year is a “no shit, Sherlock” moment for climate scientists, as temperatures around the country were 1.15 ° C above normal.
According to preliminary data from the Bureau of Meteorology, last year was Australia’s fourth warmest on record, continuing a series of record warm years over the past decade. Temperatures across the nation were 1.15 ° C above normal in 2020, placing the year behind 2005, 2013 and 2019, which is still the warmest on record. The information comes from the ACORN-SAT dataset of the bureau, which gathers readings from 112 weather stations around the country and dates back to 1910. Since 2013, the data shows, eight of the 10 hottest years on record for Australia have occurred.
“Dr. Sarah Perkins-Kirkpatrick, a climate scientist who specializes in extreme events at the University of New South Wales, said that human-caused climate change has produced another top 10 years consistently. In early 2021, CSIRO predicts that WA coast faces heatwaveContinue reading “It’s just a ‘no shit, Sherlock’ moment,” she told Guardian Australia. 2019 remains the hottest and driest year on record, when average temperatures were 1.52 C above the 30-year average between 1961 and 1990. Australia endured droughts, heatwaves and catastrophic bushfires that lasted through 2020. In March, exceptionally high sea surface temperatures in the Great Barrier Reef caused the third mass bleaching of coral in five years. Until releasing a formal climate statement on Jan. 8, the bureau would review the latest preliminary data. In September, the bureau declared a La Niña event and said in late December that its impact was likely to peak, with climate models indicating a return to neutral conditions in late summer or early fall. “Blair Trewin, senior climatologist at the office, told Guardian Australia that the influence of La Niña on temperatures tends to come in the year after the phenomenon is declared. But he said, “Clearly, 2020 was slightly warmer than a typical year. La Niña is the cooler phase of a period known as Enso (El Niño Southern Oscillation), with the warmer phase known as El Niño.
Although November was a record-breaking hot month, Trewin said December was probably relatively cold. In the northwest and central parts of the world, rainfall and cloud cover decreased temperatures. The underlying warming pattern predicted from human activities during the year, Trewin said, is the main explanation for the higher temperatures. La Niñas are associated with lower ocean temperatures in the year. La Niñas are now colder than El Niños without climate change, even though the year ends with a La Niña. We see that it gets into the top 10 every year, and gets warmer every year. She said the extra heat is produced by human activities – mainly burning fossil fuels, which add extra carbon dioxide to the atmosphere -. “She said human activities – mainly burning fossil fuels, which add extra carbon dioxide to the atmosphere – are generating the extra heat. ”
In December, the World Meteorological Organization issued a preliminary report claiming that, using an average of five global temperature records, 2020 is likely to be among the three warmest years on record worldwide. 2020 would mean that the six warmest years on record are likely to be the last six years.