A missing link in haze formation

Air-quality alerts often include the levels of particulate matter, small clumps of molecules in the lower atmosphere that can range in size from microscopic to visible. These particles can contribute to haze, clouds, and fog and also can pose a health risk, especially those at the smaller end of the spectrum. Particles known as PM10 … Read more

Arctic permafrost thaw plays greater role in climate change than previously estimated

Abrupt thawing of permafrost will double previous estimates of potential carbon emissions from permafrost thaw in the Arctic, and is already rapidly changing the landscape and ecology of the circumpolar north, a new CU Boulder-led study finds. Permafrost, a perpetually frozen layer under the seasonally thawed surface layer of the ground, affects 18 million square … Read more

Hurricane Harvey tops league of most extreme US weather this decade

A top ten of record-breaking US weather events of the last decade reveals Hurricane Harvey is the most extreme of the decade, and similar others were among the costliest and deadliest on record, according to magazine Weatherwise. Hurricane Harvey, the 2017 storm that devastated Texas and Louisiana, is ranked first followed by the 2012 ‘Frankenstorm’ … Read more

This is not a climate emergency. It’s much more serious

The ferocity, reach and duration of fires that have devastated Australian communities, bush and rural landscapes this summer should not just sound the alarm for a climate emergency, because the situation is much more serious. And Australia is “ground zero” for what is in reality a “climate crisis”. That’s the stark warning Professor Mark Howden … Read more

Can a river sing? ANU researchers say ‘absolutely’

Scientists and audio specialists have teamed up to travel the entire length of the river by kayak, starting in Kosciuszko National Park in southeast NSW and ending in South Australia. They are capturing the river’s sights and sounds as well as turning important data about the river into audio. Honours student Xavier Anderson is one … Read more

Scientists show solar system processes control the carbon cycle throughout Earth’s history

The world is waking up to the fact that human-driven carbon emissions are responsible for warming our climate, driving unprecedented changes to ecosystems, and placing us on course for the sixth mass extinction event in Earth’s history. However, new research publishing this week in leading international journal PNAS, sheds fresh light on the complicated interplay of … Read more

Global warming and extinction risk

How can fossils predict the consequences of climate change? A German research team from Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), the Museum of Natural History Berlin and the Alfred Wegener Institute compared data from fossil and marine organisms living today to predict which groups of animals are most at risk from climate change. They published their results … Read more

Solving the enigma of global terrestrial nitrogen and phosphorus limitation

The concept of nutrient limitation originated from middle 1840s, when the famous Germany chemist Justus Freiherr von Liebig first proposed the Liebig’s Law of the Minimum based on experiments that added essential nutrients to improve crop productivity. The idea was later introduced to natural plant communities, evoking numerous efforts to evaluate the extent and strength … Read more