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ScienceDaily: Earth & Climate News |
Climate cycles and insect pests drive migration timing of reindeer's North American cousin Posted: 12 Dec 2019 12:33 PM PST Biologists have discovered two unexpected drivers for migration timing that dispute long-held assumptions and provide insight into potential future effects of climate change on caribou. First, the start of migration is synchronized across North America and tied to large-scale, ocean-driven climate cycles. Second, warm, windless summers that favored insect pests lead to poorer maternal health and delayed arrivals at the calving grounds the following spring. |
When flowers reached Australia Posted: 12 Dec 2019 12:09 PM PST University of Melbourne research has established when and where flowering plants first took a foothold. |
Ocean microbes: Novel study underscores microbial individuality Posted: 12 Dec 2019 11:27 AM PST A single drop of seawater can contain a wide representation of ocean microbes from around the world -- revealing novel insights into the ecology, evolution and biotechnology potential of the global microbiome. |
Researchers perfect nanoscience tool for studies of nuclear waste storage Posted: 12 Dec 2019 11:19 AM PST Studying radiation chemistry and electronic structure of materials at scales smaller than nanometers, scientists prepared samples of clay in ultra-thin layers. Working at the TRIUMF particle accelerator, they bombarded the samples with antimatter subatomic particles. They found their system is a proven tool for radiation studies of material to be used to store nuclear waste -- important for Canadian nuclear industry looking to build its first geological repository. |
Deforestation, erosion exacerbate mercury spikes near Peruvian gold mining Posted: 12 Dec 2019 09:25 AM PST Scientists have developed a model that can predict the amount of mercury being released into a local ecosystem from deforestation. The research could point toward ways to mitigate the worst effects of mercury poisoning in regions already experiencing elevated mercury levels caused by small-scale gold mining practices, such as those in the Peruvian Amazon. |
High-precision map of Antarctic ice sheet bed topography Posted: 12 Dec 2019 09:25 AM PST Glaciologists have unveiled the most accurate portrait yet of the contours of the land beneath Antarctica's ice sheet -- and, by doing so, have helped identify which regions of the continent are going to be most vulnerable to the impact of future climate warming. |
Supporting structures of wind turbines contribute to wind farm blockage effect Posted: 12 Dec 2019 07:46 AM PST Much about the aerodynamic effects of larger wind farms remains poorly understood. New work looks to provide more insight in how the structures necessary for wind farms affect air flow. Using a two-scale coupled momentum balance method, researchers theoretically and computationally reconstructed conditions that large wind farms might face in the future, including the dampening effect that comes with spacing turbines close to one another. |
Azteca ant colonies move the same way leopards' spots form Posted: 11 Dec 2019 11:56 AM PST What could Azteca ants in coffee farms in Mexico have in common with leopards' spots and zebras' stripes? |
Virtual reality and drones help to predict and protect koala habitat Posted: 11 Dec 2019 11:55 AM PST Researchers have used a combination of virtual reality (VR), aerial thermal-imaging and ground surveys to build a better statistical model for predicting the location of koalas and, ultimately, protecting their habitat. |
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