Extreme Heat Wave Roasting Australia at Record Breaking 120.74 F
It's been the opposite of a white Christmas in Australia, as a major heat wave scorches the Land Down Under. Temperatures in the country's southeast are around 14 C (approximately 24 F) higher than normal for late December, and some parts of the states of New South Wales, Victoria and South Australia topped 40 C (104 F) for a fourth day in a row Thursday, CNN reported.
"We may well break some records across northern Victoria in terms of consecutive days across 40C for this heatwave, so it is certainly a noteworthy event," Victoria Bureau of Meteorology (BOM) senior forecaster Rod Dixon told Australia's ABC News.
In Western Australia, records did break when the city of Marble Bar hit a temperature of 49.3 C (approximately 120.74 F), the hottest since record keeping began there, Western Australia's BOM announced on Twitter.
Marble Bar hit a max temperature of 49.3°C today; its hottest day since temperature records began there in 1901. Th… https://t.co/mnUe0bpYO7— Bureau of Meteorology, Western Australia (@Bureau of Meteorology, Western Australia)1545914405.0
The immediate cause of the heat wave is a high pressure system.
"The cause of the heat is a dome of high pressure settling in over much of the continent over the past few days," CNN meteorologist Gene Norman explained.
However, climate change is also expected to continue increasing the severity and length of heat waves. In the north part of the state of New South Wales (NSW) alone, there are projected to be 10 more heat wave days per year by 2030 and 30 more by 2070, according to the government's Adapt NSW page.
Heat waves in Australia kill more people than any other extreme weather event, including flooding, bushfires and cyclones, according to the NSW government. They can also increase the risk of some hazards.
"In addition to the sweltering temperatures, there is an enhanced fire risk in Victoria, with total fire bans declared for Thursday in the Mallee and Wimmera regions. South Australia has bans in place in 10 areas including the Mount Lofty Ranges and Yorke Peninsula. Western Australia has total fire bans in 13 districts, where temperatures are expected to exceed 45 C in parts," Norman told CNN.
We issue fire weather #warnings when forecast weather conditions are likely to be dangerous. The #Fire Weather Know… https://t.co/5oNJs33vUX— Bureau of Meteorology, Australia (@Bureau of Meteorology, Australia)1545862751.0
NSW Health also issued an air quality warning for the state's capital of Sydney Thursday as ozone levels rise with the temperature, The Guardian reported. Ozone can irritate the lungs, especially in those who suffer from asthma or other respiratory ailments. However, not everyone in Sydney was suffering. As temperatures reached 32.4 C (approximately 90.32 F) residents were still able to cool down at Bondi Beach.
"We've got a nice north-easterly breeze blowing and it's a bit cooler than what it would be out west," lifeguard Bruce Hopkins told ABC News.
The beach might be the best place for Australians to ring in the New Year if they can. Low to severe heat wave conditions are expected to last in every mainland Australian state from Friday to Tuesday, The Guardian reported, though the most extreme conditions in NSW, Western Australia and South Australia will cool down somewhat.
#Heatwave conditions are being experienced across large parts of the country. Temperatures peaked at 49.1°C at Marb… https://t.co/dC1s7nThRn— Bureau of Meteorology, Australia (@Bureau of Meteorology, Australia)1545892678.0
Editor's note: This post has been updated. An earlier version said that climate change is expected to increase the severity and length of heat waves. The revised sentence clarifies that this effect is already happening.
- Redwoods are the world's tallest trees.
- Now scientists have discovered they are even bigger than we thought.
- Using laser technology they map the 80-meter giants.
- Trees are a key plank in the fight against climate change.
They are among the largest trees in the world, descendants of forests where dinosaurs roamed.
Pixabay / Simi Luft<p><span>Until recently, measuring these trees meant scaling their 80 meter high trunks with a tape measure. Now, a team of scientists from University College London and the University of Maryland uses advanced laser scanning, to create 3D maps and calculate the total mass.</span></p><p>The results are striking: suggesting the trees <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">may be as much as 30% larger than earlier measurements suggested.</a> Part of that could be due to the additional trunks the Redwoods can grow as they age, <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">a process known as reiteration</a>.</p>
New 3D measurements of large redwood trees for biomass and structure. Nature / UCL<p>Measuring the trees more accurately is important because carbon capture will probably play a key role in the battle against climate change. Forest <a href="https://www.wri.org/blog/2020/09/carbon-sequestration-natural-forest-regrowth" target="_blank">growth could absorb billions of tons</a> of carbon dioxide from the atmosphere each year.</p><p>"The importance of big trees is widely-recognised in terms of carbon storage, demographics and impact on their surrounding ecosystems," the authors wrote<a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank"> in the journal Nature</a>. "Unfortunately the importance of big trees is in direct proportion to the difficulty of measuring them."</p><p>Redwoods are so long lived because of their ability to <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">cope with climate change, resist disease and even survive fire damage</a>, the scientists say. Almost a fifth of their volume may be bark, which helps protect them.</p>
Carbon Capture Champions<p><span>Earlier research by scientists at Humboldt University and the University of Washington found that </span><a href="https://www.sciencedirect.com/science/article/pii/S0378112716302584" target="_blank" rel="noopener noreferrer">Redwood forests store almost 2,600 tonnes of carbon per hectare</a><span>, their bark alone containing more carbon than any other neighboring species.</span></p><p>While the importance of trees in fighting climate change is widely accepted, not all species enjoy the same protection as California's coastal Redwoods. In 2019 the world lost the equivalent of <a href="https://www.worldwildlife.org/threats/deforestation-and-forest-degradation" target="_blank" rel="noopener noreferrer">30 soccer fields of forest cover every minute</a>, due to agricultural expansion, logging and fires, according to The Worldwide Fund for Nature (WWF).</p>
Pixabay<p>Although <a href="https://c402277.ssl.cf1.rackcdn.com/publications/1420/files/original/Deforestation_fronts_-_drivers_and_responses_in_a_changing_world_-_full_report_%281%29.pdf?1610810475" target="_blank" rel="noopener noreferrer">the rate of loss is reported to have slowed in recent years</a>, reforesting the world to help stem climate change is a massive task.</p><p><span>That's why the World Economic Forum launched the Trillion Trees Challenge (</span><a href="https://www.1t.org/" target="_blank" rel="noopener noreferrer">1t.org</a><span>) and is engaging organizations and individuals across the globe through its </span><a href="https://uplink.weforum.org/uplink/s/uplink-issue/a002o00000vOf09AAC/trillion-trees" target="_blank" rel="noopener noreferrer">Uplink innovation crowdsourcing platform</a><span> to support the project.</span></p><p>That's backed up by research led by ETH Zurich/Crowther Lab showing there's potential to restore tree coverage across 2.2 billion acres of degraded land.</p><p>"Forests are critical to the health of the planet," according to <a href="https://www.1t.org/" target="_blank" rel="noopener noreferrer">1t.org</a>. "They sequester carbon, regulate global temperatures and freshwater flows, recharge groundwater, anchor fertile soil and act as flood barriers."</p><p><em data-redactor-tag="em" data-verified="redactor">Reposted with permission from the </em><span><em data-redactor-tag="em" data-verified="redactor"><a href="https://www.weforum.org/agenda/2021/03/redwoods-store-more-co2-and-are-more-enormous-than-we-thought/" target="_blank">World Economic Forum</a>.</em></span></p>
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