It is caused by extreme high temperature, long-term drought, strong wind and climate change.

1, extremely high temperature

Australia is in a heat wave. In the first three months, the temperature hit record highs. 65438+In mid-February, Australia ushered in the hottest day in history, with an average temperature of 4 1.9 degrees Celsius. The high temperature shows no signs of abating in the next few weeks.

2. Long-term drought.

Australia has experienced the driest spring since records began 120 years ago. Since the beginning of 20 17, there has been insufficient rainfall in most parts of New South Wales and Queensland. Trees, shrubs and grasslands have become ideal kindling.

3. Strong wind helps the situation.

Accompanied by the cold wind, it fanned flames around major cities in Australia and promoted the spread of smoke. Last week, the recorded wind speed was close to 65,438+000 kilometers per hour.

The climate is hotter and drier.

Australian climate experts say that climate change is the key to understanding the severity of this year's fire-hotter and drier conditions make the country's fire season longer and more dangerous. The Australian Climate Commission found that extreme weather in Australia has become more and more frequent in the past 30 years. According to the data of Australian National Weather Service, the temperature has increased by more than 1 Celsius since 1920, most of which has increased since 1950.

5. Human factors: slow response.

Australian Prime Minister Morrison has been widely condemned for his response to the crisis, especially his insistence that fire is nothing new and climate change is irrelevant.

Extended data:

Prime Minister Morrison declared war on the mountain fire: he announced that for the first time in the country's history, he called the reserve personnel of the Australian Defence Force to put out the fire, and deployed the Adelaide, the largest warship of the country's navy, to help evacuate the affected residents near the coastline. The United States, France, Canada and many other countries have also provided assistance to Australia to help put out the fire.

Australian ecologists estimate that at least 480 million wild animals died in fires in New South Wales alone. The number of animals killed by forest fires in other states is unknown, but experts estimate that the number of animals killed in fires may reach 654.38+0 billion. It is reported that this fire will not only cause irreparable ecological disasters, but also cause economic losses of at least 5 billion Australian dollars (about 23.7 billion yuan). It is estimated that Australia's short-term GDP growth rate will be reduced by 0.2 to 0.5 percentage points, especially in tourism and animal husbandry.

References:

People's Network-Why can't Australia put out the mountain fire that has burned for half a year?