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- Can tiny aerosol particles make tropical convective clouds grow stronger? For decades, scientists have debated this question because aerosols can change how cloud droplets form, grow and release latent heat. One proposed pathway, known as condensational aerosol convective invigoration, requires clouds to contain high water-vapor supersaturation. Under such conditions, adding aerosol particles can create many new droplets, enhance condensation, release additional latent heat and potentially strengthen convective updrafts.
- In 2011, Japan reeled from the effects of a devastating magnitude 9.0 earthquake. But unnoticed in the chaos resulting from the quake, its major aftershocks and the tsunami it caused, something strange happened. About 16 minutes after the earthquake, but before the aftershocks hit, Japan's GPS stations registered an eastward lurch—across the entire country—but unconnected to any specific quake or aftershock.
- Soils that are exposed to prolonged drought often develop desiccation cracks, which impact soil properties and exacerbate moisture loss through evapotranspiration. Now, a study from the University of Illinois Urbana-Champaign examines the evolution of soil cracking and how cracks interact with storage and movement of water in the soil. The findings can help improve hydrological models essential for water management. The research is published in the journal Soil and Tillage Research.
- Researchers at the University of Tsukuba have discovered that rainwater runoff in the highly rugged sedimentary rock mountains of Japan's Southern Alps is governed by two processes: "deep infiltration" and "shallow drainage via landslides." These processes are dictated by the inclination of geological strata. Based on these findings, the researchers propose a conceptual framework, termed the "structural ground system," to explain how the bedding structure regulates rainwater runoff.
- A study led by South African scientists reveals that during winter, the sea ice around Antarctica harbors a reservoir of microbes, most of which have one thing in common—the ability to produce and break down a compound known to protect organisms in extreme environments.
- Rainfall history is just as critical to predicting air pollution as where the air came from, a team led by University of Michigan Engineering researchers, in collaboration with scientists at the Appalachian Mountain Club and Plymouth State University, has discovered. The findings give meteorologists a physical benchmark to improve simulations that predict changes in pollution levels over complex terrain. They also show how air pollution can be deposited in sensitive mountain environments, with downstream effects for waterways fed from the mountains.
- Scientists have uncovered new evidence from one of Earth's most extreme ancient warming events, revealing how the climate may recover long after human-driven CO2 emissions cease.
- Florida State University researchers have identified key differences in the root causes of long-term sea-surface temperature changes across the Atlantic and Pacific oceans, a finding that could help guide future research on ocean variability. The study by Assistant Professor of meteorology Michael Diamond and FSU meteorology graduate alumnus Anthony Freveletti found that long-term temperature changes in the Pacific Ocean are driven primarily by internal ocean variability, while those in the Atlantic are largely the result of human emissions.
- Methane is one of the most powerful greenhouse gases, and lakes and wetlands are among its largest natural sources. In many lakes, methane can be seen bubbling up from the bottom and escaping directly into the atmosphere.
- Arctic fjords are among the most efficient natural systems for absorbing and storing carbon long term. However, as the Arctic is warming about four times faster than the global average, fjord ecosystems are changing rapidly. Against this backdrop, understanding the biological processes that regulate carbon storage is becoming increasingly important. Yet the microbial mechanisms that control whether carbon is stored in sediments or returned to the environment are still not fully understood.
- A new study published in Nature shows that rock weathering increasingly counteracts river CO2 emissions as permafrost degrades. The study was carried out by a collaborative team of researchers from Umeå University in Sweden and East China Normal University.
- Scientists have discovered that the southern Andes Mountains don't rise slowly and steadily as previously thought. Instead, the range builds itself in short, powerful "pulses" every few million years.
- Climate change could push UK rivers to dangerous extremes and bring more frequent rapid swings between wet and dry conditions—a phenomenon known as hydroclimatic whiplash—according to research led by the University of East Anglia (UEA). Researchers analyzed almost 700 river catchments across the UK to project how river flows may change at 2° C and 4° C of global warming. The results reveal stark regional contrasts and growing challenges for communities and water managers trying to plan for flood and drought risk, particularly in areas that will increasingly experience both.
- Marine heat waves (MHWs) are events characterized by prolonged warm coastal and ocean conditions with wide-ranging impacts on ecosystem health and associated industries. While research on MHWs has historically relied on surface-water data from satellite observations and buoy records, new research from the Batten School of Coastal & Marine Sciences & VIMS highlights the need to—quite literally—go deeper.
- Hot and dry conditions have become synonymous with the risk of extreme wildfires. But a new paper argues that such conditions are not, by themselves, sufficient for blazes, and most warm years do not result in the burning of exceptionally large areas.
- An international team of researchers has found plants in the tropics absorb much less carbon dioxide than previous modeling had suggested, which has implications for ecosystem management.
- Snowfall deep inside East Antarctica has increased in recent decades, and distant ocean temperature changes may be partly responsible. Using long-term climate data and observations from Dome Fuji station, researchers found that the increase in snowfall is strongly linked to atmospheric blocking patterns that carry moist air into inland Antarctica. These patterns are, in turn, influenced by sea surface temperature changes in the subtropical South Atlantic Ocean—highlighting important climate connections across vast distances.
- A chain of remote islands and underwater volcanoes between Alaska and Kamchatka has revealed a much older chapter in Earth's tectonic history than previously known. Along the Aleutian Arc, the Pacific Plate dives beneath the North American Plate, creating one of the most active and important plate boundaries on Earth. An international research team has now shown that this subduction zone began at least 56 million years ago, significantly earlier than previous models had assumed. The findings, published in Nature Communications, shed new light on a major reorganization of plate motions and may also help better understand ancient global climate […]
- Most of the earthquakes we hear about are due to tectonic plates colliding or sliding past each other near plate boundaries. Yet researchers have detected some enigmatic earthquakes happening inside the more stable interiors of plates. Intermediate-depth earthquakes (IDEs), which occur around 70–300 kilometers (43–186 miles) below the surface, are especially puzzling because rocks at those depths are hot enough to flow more fluidly.
- Communities around the world have adapted to live on the year-round frozen soil of frigid environments, such as in the Arctic. However, rising temperatures have introduced a new challenge: What happens when the ground under houses and roads begins to melt?
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