Los incendios forestales son una característica habitual en el calendario de Australia, a menudo desencadenada por causas naturales como los rayos, y no pueden atribuirse solo al cambio climático o al aumento de las emisiones de gases de efecto invernadero.
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Il negazionismo climatico del governo australiano
Che i governi dell’Australia abbraccino posizioni negazioniste sul fronte del cambiamento climatico non è una novità delle ultime ore. Già nell’agosto 2018, l’ormai ex Primo Ministro Malcolm Turnbull aveva compiuto un passo indietro rispetto all’Accordo di Parigi, decidendo di non rispettare gli impegni presi per ridurre le emissioni di gas serra.
Gli arresti per incendio doloso
Mentre le fiamme e le polemiche continuano a divampare, nel frattempo la polizia del Nuovo Galles del Sud ha riferito che le autorità australiane hanno accusato 183 persone di aver appiccato deliberatamente gli incendi boschivi degli ultimi mesi.
How much has the temperature increased in Australia in the past 25 years?
Australian daytime temperatures over land have increased by 1.25° in the past 25 years, or 5° per century. “That’s a massive increase, and it overshadows the variations in temperature we get from year to year through what we used to call natural climate variations due to SAM or the IOD or El Niño,” he says.
What happened to Canberra in January?
Howden points to a “mind-boggling storm” that on 20 January slammed the ANU Canberra campus and produced fist-sized hail that smashed car windows. Just 11 days later, a state of emergency was declared for the capital city as a bushfire approached from the south and the high reached 42°.
What was the average temperature in Australia in December?
Australia had an all-time average high temperature of 40.3° on 17 December, but that was topped the next day with a reading of 40.7°. The nation’s average rainfall totaled 277.6 mm last year, well below the previous record low of 314.5 mm established in 1902.
Which country has the highest per capita emissions?
Per capita emissions are among the highest of the developed countries, ahead of the US, Canada, the UK, and Russia. That’s due in large part to the nation’s high proportion of coal-generated electricity, much of which is fueled by lignite. Australia is the world’s largest exporter of coal and liquefied natural gas.
Is Australia experiencing a bushfire season?
The country’s catastrophic bushfire season could either be a one-off or a new normal, experts say. As the world’s attention was drawn to Australia’s lethal bushfires, climate change was most invoked as the spark. But while global warming most certainly played some role in producing the worst fires in Australia’s recent history, ...
What is the cause of the bushfires in Australia?
As Australia’s unprecedented bushfire season continues to unfold, competing arguments have been made about the principal causes of the human and environmental tragedy – particularly around the role of climate change. The prime minister, Scott Morrison, has acknowledged that climate change has had an influence on the fires ...
Why are the Queensland bushfires so hot?
A study of Queensland’s historic 2018 bushfire season found the extreme temperatures that coincided with the fires were four times more likely because of human-caused climate change. In advice issued in November 2019, Australia’s National Environmental Science Program was unambiguous.
Why is Australia needed to improve its climate modelling ability?
On Friday afternoon the president of the Australian Academy of Science, Prof John Shine, said Australia would need to further improve its climate modelling ability and understanding of fire behaviour to mitigate against the extreme events that would become more frequent and intense because of climate change.
How does the number of extreme positive dipole events go up?
A 2018 study in the journal Nature Communications found the number of extreme positive dipole events goes up as climate heating continues. At 1.5C of global warming, the frequency of extreme positive dipole events doubles compared with the pre-industrial period.
Le cause degli incendi in Australia
Cosa provoca questi incendi? Come riportato in un articolo recente apparso sul The Guardian, è stata messa in atto una vera e propria campagna di disinformazione online, in cui “bots e trolls” incolpavano dei roghi presunti piromani, volontari o involontari, solo per nascondere il forte legame con il cambiamento climatico ed evitare così di scatenare accuse di tipo “politico”..
Quanto influisce il riscaldamento globale?
È soprattutto nella propagazione di questi incendi e nella difficoltà a domarli che si può parlare di effetto indiretto del riscaldamento globale.
Le accuse alla politica australiana sono fondate?
Il popolo australiano – e non solo – non ha molto apprezzato il discorso di fine anno del suo Primo Ministro, Scott Morrison, il quale ha mostrato una certa superficialità nell’affermare che questa catastrofe sia solamente ordinaria amministrazione e che: “nonostante i terribili incendi, la siccità che continua e le inondazioni l’Australia rimane il miglior Paese dove far crescere i bambini”..
Come possiamo agire?
Ognuno di noi può contribuire alla salvaguardia del nostro pianeta e a prevenzione di questo tipo di catastrofi come ci ricorda il ricercatore Giorgio Vacchiano nel suo articolo per Il Post: “Ridurre le nostre emissioni con comportamenti collettivi e ad alto impatto.