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27 July 2023, NOAA: Has climate change already affected ENSO? This is a guest post by Mike McPhaden, who is a senior scientist at NOAA Pacific Marine Environmental Laboratory in Seattle, WA. Mike has previously blogged with us and was lead editor of the book “El … Continue reading →

PLEA Network

5 July 2023, The Conversation: An El Niño event has arrived, according to the World Meteorological Organization, raising fears of record high global temperatures, extreme weather and, in Australia, a severe fire season. The El Niño is a reminder that bushfires are part of Australian life – especially as human-caused global warming worsens. But there are a few important considerations to note. First, not all El Niño years result in bad bushfires. The presence of an El Niño is only one factor that determines the prevalence of bushfires. Other factors, such as the presence of drought, also come into play. And second, whether or not this fire season is a bad one, Australia must find a more sustainable and effective way to manage bushfires. The El Niño threat only makes the task more urgent. But before we start planning ahead for the next bushfire season, it’s important to understand what drives bushfire risks – and the influence of climate change, fire management and events such as El Niño. The evidence for human-induced climate change is irrefutable. While the global climate has changed significantly in the past, the current changes are occurring at an unprecedented rate. In geologic time scales, before the influence of humans, a significant shift in climate has been associated with an increase in fire activity in Australia. There is every reason to expect fire activity will increase with human-induced climate change as well. Humans have also changed the Australian fire landscape – both First Nations people and, for the past 200 years, European colonisers. Changes brought about by Indigenous Australians were widespread, but sustainable. Their methods included, for example, lighting “cool” fires in small, targeted patches early in the dry season. This reduced the chance that very large and intense fires would develop. Read more here

PLEA Network

26 May 2023, The Conversation, Antarctic alarm bells: observations reveal deep ocean currents are slowing earlier than predicted. Antarctica sets the stage for the world’s greatest waterfall. The action takes place beneath the surface of the ocean. Here, trillions of tonnes … Continue reading →

PLEA Network

18 May 2023, NOAA – Climate .gov: As we blogged about earlier this month, the odds that El Niño—the warm phase of the planet’s most powerful natural climate pattern, the El Niño-Southern Oscillation—will emerge in the tropical Pacific Ocean later this year … Continue reading →

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