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Terra Daily (Austrália)
Em 2024: 3 notícias
Desde 1995: 23 notícias
Wildfires caused major CO2 emissions last year: annual study
Publicado em 13 agosto 2024
Paris (AFP) – Wildfires made more frequent and intense by climate change released significant quantities of CO2 into the air in 2023-2024, said a first-of-its-kind annual study published Wednesday.
Fires in natural areas caused 8.6 billion tonnes of CO2 emissions worldwide between March 2023 and February 2024 -- 16 percent above average.
Only a relatively calm fires season in the African savannah prevented the 2023-2024 season from breaking a fresh record for CO2 emissions at the [...]
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In Brazil, hopes to use AI to save wildlife from roadkill fate
Publicado em 23 abril 2024Rio de Janeiro (AFP) – In Brazil, where about 16 wild animals become roadkill every second, a computer scientist has come up with a futuristic solution to this everyday problem: using AI to alert drivers to their presence. Direct strikes on the vast South American country's extensive road network are the top threat to numerous species, forced to live in ever-closer proximity with humans. According to the Brazilian Center for Road Ecology (CBEE), some 475 million vertebrate [...]ver notícia -
Amazon rainforest may face tipping point by 2050: Study
Publicado em 14 fevereiro 2024PARIS, Feb 15, 2024 (BSS/AFP) - The Amazon rainforest is facing a barrage of pressures that might tip it into large-scale ecosystem collapse as soon as 2050, according to new research Wednesday warning of dire consequences for the region and the world. The Amazon, which holds more than 10 percent of the world's biodiversity, helps stabilise the global climate by storing the equivalent of around two decades of emissions of planet-warming carbon dioxide. But stress from deforestation, [...]ver notícia -
A new map showing all above-ground biomass in the Brazilian Amazon
Publicado em 21 dezembro 2023Publication of a new map showing all the above-ground biomass in the Brazilian Amazon is good news in the context of the severe crisis afflicting the world's largest contiguous tropical rainforest. Using airborne laser scanning and satellite imagery calibrated by field forest inventories and integrated by heavy-duty computer processing and machine learning, the map reflects the world's largest survey of tropical forest biomass ever conducted. Results of the study are reported in an [...]ver notícia -
Analysis of carbon cycle during last glacial period can help monitor climate crisis
Publicado em 30 novembro 2023Gas exchanges between the atmosphere and the ocean are a key part of the carbon cycle, playing a vital role in climate regulation and maintenance of the planet's ecological equilibrium. The oceans are thought to absorb roughly a third of all the carbon dioxide (CO2) emitted by humanity. Understanding the complex processes involved in this gas exchange is therefore extremely important, especially in the context of the global climate crisis. A new study discusses the processes that [...]ver notícia -
Amazon emissions soared under Brazil's Bolsonaro: study
Publicado em 23 agosto 2023The Amazon rainforest's carbon emissions doubled in 2019 and 2020, as a decline in environmental policing under Brazilian ex-president Jair Bolsonaro led to a surge in destruction of the increasingly fragile region, researchers reported Wednesday. The world's biggest rainforest is a vital buffer against climate change, but studies show it has started emitting more carbon than it absorbs, pushed to a dangerous "tipping point" by deforestation and fires -- mainly for cattle [...]ver notícia -
Secret behind Amazonian 'dark earth' could help speed up forest restoration across the globe
Publicado em 07 maio 2023Between approximately 450 BCE and 950 CE, millions of Amerindian people living in today's Amazonia transformed the originally poor soil through various processes. Over many human generations, soils were enriched with charcoal from their low-intensity fires for cooking and burning refuse, animal bones, broken pottery, compost, and manure. The result is Amazonian dark earth (ADE) or terra preta, exceptionally fertile because rich in nutrients and stable organic matter derived from charcoal, [...]ver notícia -
Scientists Make 'Disturbing' Find On Remote Island: Plastic Rocks
Publicado emThere are few places on Earth as isolated as Trindade island, a volcanic outcrop a three- to four-day boat trip off the coast of Brazil. So geologist Fernanda Avelar Santos was startled to find an unsettling sign of human impact on the otherwise untouched landscape: rocks formed from the glut of plastic pollution floating in the ocean. Santos first found the plastic rocks in 2019, when she traveled to the island to research her doctoral thesis on a completely different [...]ver notícia -
Hollow bones that let dinosaurs become giants evolved at least three times
Publicado emDinosaurs as big as buses or five-story buildings would not be possible if their bones were dense and heavy like ours. Like present-day birds, dinosaurs had hollow bones with inner structures known as air sacs, which made their skeletons lighter and less dense. These structures were apparently so advantageous that they emerged at least three times during the evolution of dinosaurs and pterosaurs (flying reptiles), according to a study supported by FAPESP and described in an article in [...]ver notícia -
Researchers identify neurons that specialize in remembering speed and location
Publicado em 15 setembro 2022Over a decade after the role of pyramidal neurons in mental representations of space and location was discovered, a group of Brazilian and American researchers has made an important contribution to scientists' understanding of the brain's navigation system by identifying a subtype of these neurons that can gauge speed with great precision. "In experiments involving animals, we demonstrated an association between the electrical activity of inhibitory interneurons and speed [...]ver notícia