Category: Earth

A better way to predict Arctic riverbank erosion

Apr 25, 2024 | ,

Arctic riverbanks are typically resilient, thanks to the power of permafrost. This permanently frozen soil locks in sediment, leading to low erosion rates. But as Arctic river water warms due to climate change, some researchers worry that riverbanks in the region will thaw and crumble. This, in turn, could cause problems, including the release of stored soil carbon and damage to infrastructure near rivers.
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Lakes worldwide are facing a slew of health issues that may become chronic

Apr 23, 2024 | ,

Like humans, lakes are living systems that can suffer from a number of health issues, including circulatory and respiratory problems, infections, nutritional imbalances, and heat-related illnesses. Without treatment, these conditions can become chronic, harming lake ecosystems and those who depend on them. More than 12% of the world’s human population, for instance, lives within 3 kilometers of a lake.
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A comprehensive monitoring and evaluation of disaster risk due to linkage of residual coal pillars and rock strata

Apr 22, 2024 | ,

A large number of coal pillars were left behind during the mining of multi-coal seams. These pillars, when unstable, pose significant risks during both production and well closure stages in coal mines. Their failure can exert intense dynamic pressure on lower coal seams, resulting in substantial deformation and damage to support structures and mining tunnels.
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World’s oases threatened by desertification, even as humans expand them

Apr 22, 2024 | ,

Oases are important habitats and water sources for dryland regions, sustaining 10% of the world’s population despite taking up about 1.5% of land area. But in many places, climate change and anthropogenic activities threaten oases’ fragile existence. New research shows how the world’s oases have grown and shrunk over the past 25 years as water availability patterns have changed and desertification encroaches on these wet refuges.
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Hidden threat: Global underground infrastructure vulnerable to sea-level rise

Apr 15, 2024 | ,

As sea levels rise, coastal groundwater is lifted closer to the ground surface while also becoming saltier and more corrosive. A recent study by Earth scientists at the University of Hawai’i (UH) at Mānoa has compiled research from experts worldwide showing that in cities where there are complex networks of buried and partially buried infrastructure, interaction with this shallower and saltier groundwater exacerbates corrosion and failure of critical systems such as sewer lines, roadways, and building foundations.
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Northern permafrost region emits more greenhouse gases than it captures, study finds

Apr 15, 2024 | ,

Permafrost underlies about 14 million square kilometers of land in and around the Arctic. The top 3 meters contain an estimated 1 trillion metric tons of carbon and 55 billion metric tons of nitrogen. Historically, the northern permafrost region has been a sink for carbon, as frozen soils inhibit microbial decomposition. But rising temperatures contribute to thawing permafrost and enhance the biogeochemical activities that exacerbate climate change by releasing greenhouse gases such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).
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Pyrite may contain valuable lithium, a key element for green energy

Apr 15, 2024 | ,

There’s a reason airlines won’t let you put your laptop in your checked luggage; the lithium-ion battery poses a serious fire hazard. But why? Lithium is incredibly reactive. For instance, pure lithium violently interacts with seemingly innocuous water, releasing heat and forming highly flammable hydrogen. This reactivity, however, is exactly why lithium makes a great material for batteries, and why it is a critical mineral for the green energy transition. Lithium-ion batteries are widely used in electric vehicles. Plus, they can store energy produced by renewable resources like solar and wind.
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As climate change progresses, new rainfall patterns may affect plants worldwide

Apr 12, 2024 | ,

April showers are increasingly becoming deluges due to climate change, and May flowers will never be the same. And it’s not just April; the warming of the planet is causing a year-round, worldwide trend toward more intense but less frequent rainfalls, a dynamic that will increasingly impact plants worldwide, according to a University of Maryland-led study published in Nature Reviews Earth & Environment.
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Africa’s carbon sink capacity is shrinking

Apr 4, 2024 | ,

The population of Africa, the second-largest continent in the world, currently sits at about 1.4 billion, but is set to exceed 2 billion by 2040. This means greater swaths of land than ever before are being used for agriculture, and livestock numbers are increasing. A new estimate of Africa’s greenhouse gas budget between 2010 and 2019 quantifies just how much these changes in land use have affected Africa’s role in the global carbon cycle. The research is published in the journal Global Biogeochemical Cycles.
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Climate engineering carries serious national security risks—countries facing extreme heat may try it anyway

Apr 4, 2024 | ,

The historic Paris climate agreement started a mantra from developing countries: “1.5 to stay alive.” It refers to the international aim to keep global warming under 1.5 degrees Celsius (2.8 Fahrenheit) compared with preindustrial times. But the world will likely pass that threshold within a decade, and global warming is showing little sign of slowing.
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Ancient ocean oxygenation timeline revealed

Apr 4, 2024 | ,

Dr. Uri Ryb and Dr. Michal Ben-Israel from the Institute of Earth Sciences at the Hebrew University, along with their collaborators, have made an important discovery in Earth sciences. Their study, published in Nature Communications, introduces a new approach to reconstruct the rise of oxygen in ancient marine environments using U and Pb measurements in dolomite rocks spanning the last 1.2 billion years.
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New electrochemical technology could de-acidify the oceans—and even remove carbon dioxide in the process

Mar 30, 2024 | ,

In the effort to combat the catastrophic impacts of global warming, we must accelerate carbon emissions reduction efforts and rapidly scale strategies to remove carbon dioxide (CO2) from the atmosphere and the oceans. The technologies for reducing our carbon emissions are mature; those for removing carbon from the environment are not, and need robust support from governments and the private sector.
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Study underscores uncertain costs of iron fertilization

Mar 29, 2024 | ,

As society grapples with the intensifying consequences of climate change, decision-makers are increasingly looking to carbon dioxide removal as a necessary complement to emission reductions. One of the strategies that has received the most attention is the idea of fertilizing parts of the ocean with iron to stimulate phytoplankton growth.
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