What Is an Overcast Sky? In NSW, it is just about all of the state – 98.4 per cent, according to the government. Victoria hasn't declared drought, but says central and east Gippsland and Millewa in the north-west are its main dry regions. Where winter rain is on the rise – in parts of the north and interior – the extra moisture is typically on top of a low base and in sparsely populated regions.Climate change is blamed for accelerating the winds that circle around Antarctica, drawing storm tracks further south so some miss the mainland.By contrast, for some areas in southern Australia, rainfall is increasing during the warmer months. Droughts can vary in intensity (how much rain However, you can look at various aspects of droughts and compare those. Western Australia has had its third-driest start to any year – and the driest since 1936 – and northern South Australia has not had a drier January-October on record.The weather bureau uses "rainfall deficiencies" as its measure. Geographical factors make Australia particularly drought-prone. While this year's seasonal cycle may be later than usual, at least one curb on rainfall should soon be wound back.And it will probably take a lot more than near-normal rain to have this drought declared broken. In the southeast we've also seen a change from the late 1990s.

What causes drought? For instance, how large is the area affected? Most of the country gets low, highly erratic rainfall due to a climate phenomenon called the Southern Oscillation, which is a shift in air pressure between Asian and East Pacific regions. That is, we compare it to rainfall in the same area, at the same time of year using gridded national analysis of records going back to 1900. 5 Natural and Human Causes of Drought Or, as the Unlike other extreme weather events such as heavy rain or heatwaves, though, droughts are tricky to measure. Drought has gripped large swathes of south-eastern Australia for the past three years, prompting fierce debate about the best policies to help farmers and regional communities, and sparking fears about just how dry future conditions will be. Australia's climate is affected by a number of different Since the 1970s there's been a strong trend of lower rainfall in southwestern Western Australia in the cooler months, especially over May–July. And, as plants also help moderate the local climate through a process called evapotranspiration, when they die another hand brake on the heat is removed.The dried-out Southern Macquarie Marshes nature reserve in August.
In southwest Western Australia, the impact of the shift in fronts was seen earlier because these were the primary source of rain in the cooler months. And what is the role of climate change?Drought is about what's missing – rain. A lot of this variation—but not all—can be explained by what's happening in the climate system. To understand when droughts are occurring it's necessary to know how much water is around and how that compares to normal conditions.To understand how current rainfall relates to 'normal' conditions, we compare apples with apples. Australia's biggest dry spells include the Federation Drought (1895-1902), World War II Drought (1937-1945) and the Millennium Drought (1997-2009).Measured on a range of time scales, the current drought is extreme. That shift, though, comes as little consolation for farmers now reliant on winter harvests.Evaporation, which depends more on sunlight and relative humidity than temperature, is typically higher in summer so run-off into dams will be less than if it rained in winter.More summer rain "should green up the landscape because plants have more water when they need it most but it will dry up our rivers", Professor Roderick says.While it's not clear how annual rainfall totals will change in a warming world, future droughts will be hotter when they do arrive, says Ben Henley, a climate researcher at the University of Melbourne. Many other towns had just one to two years worth of water, a problem that this drought has exposed, he says.If you'd like some expert background on an issue or a news event, drop us a line atPeter Hannam writes on environment issues for The Sydney Morning Herald and The Age.How bad is this drought and is it caused by climate change? Rainfall totals in the lowest 10 per cent are considered to be in 'If below-average rainfall continues over months and years, water storages are depleted. "We're really quite concerned in southern Australia," he says. Ohio, who has been in a sports championship drought and moving out of it is headed into a water drought. The 2000s drought in Australia, also known as the Millennium drought is said by some to be the worst drought recorded since European settlement.. Or there may be sufficient rain at the right time of year to grow a crop, but not enough to replenish water storages. Australia has seen an increase in extreme heat events and the severity of drought, according to the CSIRO and Australian Bureau of Meteorology’s State of the Climate 2018 report [3]. In southeastern Australia, the impact wasn't as marked initially because rainfall there comes from more varied sources, such as northwest cloud bands coming from the tropics and The decrease in rainfall, with the decrease in the number of very wet years, means it's becoming harder to properly recover from drought, in terms of replenishing water reserves.
Fronts from the Southern Ocean, which typically bring rain across southern Australia during winter and spring, have shifted southwards with a warming climate, leading to declines in rainfall in southwest and southeast Australia and increasing the […] "By June 2018, they reported that all types of trees were dying, leaving a desert-like landscape of sand dunes replacing the normally vegetated scene," the paper says.As plants dry or die,the risk of major bushfires increases.


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