ScienceDaily: Earth & Climate News |
| Falcons have natural 'eye makeup' to improve hunting ability Posted: 01 Jun 2021 04:41 PM PDT Dark 'eyeliner' feathers of peregrine falcons act as sun shields to improve the birds' hunting ability, a new scientific study suggests. Scientists have long speculated that falcons' eye markings improve their ability to target fast-moving prey, like pigeons and doves, in bright sunlight. Now research suggests these markings have evolved according to the climate; the sunnier the bird's habitat, the larger and darker are the tell-tale dark 'sun-shade' feathers. |
| Turning the tables -- how table corals are regenerating reefs Posted: 01 Jun 2021 01:50 PM PDT New research shows table corals can regenerate coral reef habitats on the Great Barrier Reef decades faster than any other coral type. The research suggests overall reef recovery would slow considerably if table corals declined or disappeared on the Great Barrier Reef. |
| New evidence may change timeline for when people first arrived in North America Posted: 01 Jun 2021 01:50 PM PDT An unexpected discovery suggests that the first humans may have arrived in North America more than 30,000 years ago - nearly 20,000 years earlier than originally thought. |
| How best to focus efforts on classifying new species to prevent their extinction? Posted: 01 Jun 2021 12:20 PM PDT Many organisms in need of conservation are still unknown or lumped in with similar species, which potentially interferes with conservation efforts. Researchers present a new 'return-on-investment' approach to best direct efforts to identify new species before they are lost. |
| If countries implement Paris pledges with cuts to aerosols, millions of lives can be saved Posted: 01 Jun 2021 12:19 PM PDT Aerosol reductions that would take place as countries meet climate goals could contribute to global cooling and prevent more than one million annual premature deaths over a decade, according to a new study. |
| How AI could alert firefighters of imminent danger Posted: 01 Jun 2021 10:58 AM PDT Researchers have developed an artificial-intelligence-powered tool to predict and warn of a deadly phenomenon in burning buildings known as flashover, when flammable materials in a room ignite almost simultaneously, producing a potentially ferocious blaze. The tool's predictions are based on temperature data from a building's heat detectors, and, remarkably, it is designed to operate even after heat detectors begin to fail, making do with the remaining devices. |
| Precise data for improved coastline protection Posted: 01 Jun 2021 10:58 AM PDT Researchers have conducted the first precise and comprehensive measurements of sea level rises in the Baltic Sea and the North Sea. A new method now makes it possible to determine sea level changes with millimeter accuracy even in coastal areas and in case of sea ice coverage. This is of vital importance for planning protective measures. |
| How the major Swedish forest fire of 2014 affected the ecosystem Posted: 01 Jun 2021 10:57 AM PDT Researchers have spent four years gathering data from the areas affected by the major forest fire of 2014. In their study of how the ecosystem as a whole has been altered, they could see that water quality in watercourses quickly returned to normal, while forested areas continued to lose carbon for many years after the fire. |
| Is the U. S. understating climate emissions from meat and dairy production? Posted: 01 Jun 2021 09:18 AM PDT Methane emissions from North American livestock may be routinely undercounted, a new analysis finds. The work also notes that in developing countries, where animal agriculture is becoming increasingly industrialized, methane emissions could rise more than expected. |
| Air quality improved during India lockdown, study shows Posted: 01 Jun 2021 09:18 AM PDT Research has shown the first COVID-19 lockdown in India led to an improvement in air quality and a reduction in land surface temperature in major urban areas across the country. |
| Californian smoke drifted as far as Europe in 2020 and caused heavy clouding of sun Posted: 01 Jun 2021 09:18 AM PDT The smoke from the extreme forest fires on the US West Coast in September 2020 travelled over many thousands of kilometers to Central Europe, where it continued to affect the atmosphere for days afterwards. A comparison of ground and satellite measurements now shows: The forest fire aerosol disturbed the free troposphere over Leipzig in Germany as never before. |
| Western Australia's natural 'museums of biodiversity' at risk Posted: 01 Jun 2021 09:17 AM PDT Up to three quarters of the biodiversity living on Western Australia's iconic ironstone mountains in the State's Mid West (known as Banded Iron Formations) could be difficult or impossible to return quickly to its previous state after the landscape has been mined, a study has found. |
| Key causes of ocean circulation change Posted: 01 Jun 2021 09:17 AM PDT Researchers have identified the key factors that influence a vital pattern of ocean currents. |
| Looking at future of Antarctic through an Indigenous Maori lens Posted: 01 Jun 2021 07:07 AM PDT It is time for the management and conservation of the Antarctic to begin focusing on responsibility, rather than rights, through an Indigenous Maori framework, an academic argues. |
| The secret to stickiness of mussels underwater Posted: 01 Jun 2021 07:06 AM PDT Mussels survive by sticking to rocks in the fierce waves or tides underwater. Materials mimicking this underwater adhesion are widely used for skin or bone adhesion, for modifying the surface of a scaffold, or even in drug or cell delivery systems. However, these materials have not entirely imitated the capabilities of mussels. |
| Adaptability of 158 butterfly species to urbanization Posted: 01 Jun 2021 07:06 AM PDT Expanding urban habitats are likely to endanger a large number of butterfly species in the long term. Generalists that tolerate large temperature fluctuations and feed on different plants are most likely to benefit from human-modified habitats. In order to preserve biodiversity, urban and spatial planning should take the needs of specialized butterfly species into account, the authors recommend. |
| Small 'snowflakes' in the sea play a big role Posted: 01 Jun 2021 07:06 AM PDT In the deep waters that underlie the productive zones of the ocean, there is a constant rain of organic material called 'marine snow.' Marine snow behaves similarly to real snow: large flakes are rare and fall quickly while abundant smaller flakes take their time. Scientists have now discovered that precisely those features explain why small particles play an important role for the nutrient balance of the oceans. |
| Greenhouse gas emissions from reservoirs higher than previously expected Posted: 01 Jun 2021 07:06 AM PDT A new study shows per-area greenhouse gas emissions from the world's water reservoirs are around 29% higher than suggested by previous studies, but that practical measures could be taken to help reduce that impact. |
| Extreme CO2 greenhouse effect heated up the young Earth Posted: 31 May 2021 12:32 PM PDT Although sun radiation was relatively low, the temperature on the young Earth was warm. An international team of geoscientists has found important clues that high levels of carbon dioxide in the atmosphere were responsible for these high temperatures. It only got cooler with the beginning of plate tectonics, as the CO2 was gradually captured and stored on the emerging continents. |
| Using fossil plant molecules to track down the Green Sahara Posted: 31 May 2021 12:32 PM PDT Researchers have developed a new concept to explain the phenomenon known as Green Sahara. They demonstrate that a permanent vegetation cover in the Sahara was only possible under two overlapping rainy seasons. |
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