Reference Terms
from Wikipedia, the free encyclopedia
Dune
In physical geography, a dune is a hill of sand built by eolian processes. Bare dunes are subject to shifting location and size based on their interaction with the wind. The "valley" or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes. Large dune fields are known as ergs.
Some coastal areas have one or more sets of dunes running parallel to the shoreline directly inland from the beach. In most such cases the dunes are important in protecting the land against potential ravages by storm waves from the sea. Although the most widely distributed dunes are those associated with coastal regions, the largest complexes of dunes are found inland in dry regions and associated with ancient lake or sea beds.
Related Stories
1
2
Earth & Climate News
November 11, 2025
Nov. 9, 2025 — Researchers from the University of Vienna discovered MISO bacteria that use iron minerals to oxidize toxic sulfide, creating energy and producing sulfate. This biological process reshapes how scientists understand global sulfur and iron cycles. By ...
Nov. 9, 2025 — In Death Valley’s relentless heat, Tidestromia oblongifolia doesn’t just survive—it thrives. Michigan State University scientists discovered that the plant can quickly adjust its photosynthetic machinery to endure extreme temperatures that ...
Nov. 9, 2025 — Around 9,000 years ago, East Antarctica went through a dramatic meltdown that was anything but isolated. Scientists have discovered that warm deep ocean water surged beneath the region’s floating ice shelves, causing them to collapse and ...
Nov. 8, 2025 — Scientists have discovered that deep-sea mining plumes can strip vital nutrition from the ocean’s twilight zone, replacing natural food with nutrient-poor sediment. The resulting “junk food” effect could starve life across entire marine ...
Nov. 8, 2025 — A new study shows that the Southern Ocean releases far more carbon dioxide in winter than once thought. By combining laser satellite data with AI analysis, scientists managed to “see” through the polar darkness for the first time. The results ...
Nov. 6, 2025 — Researchers warn Antarctica is undergoing abrupt changes that could trigger global consequences. Melting ice, collapsing ice shelves, and disrupted ocean circulation threaten sea levels, ecosystems, and climate stability. Wildlife such as penguins ...
Nov. 5, 2025 — A new copper-magnesium-iron catalyst transforms CO2 into CO at low temperatures with record-breaking efficiency and stability. The discovery paves the way for affordable, scalable production of carbon-neutral synthetic ...
Nov. 5, 2025 — Scientists discovered 6-million-year-old ice in Antarctica, offering the oldest direct record of Earth’s ancient atmosphere and climate. The finding reveals a dramatic cooling trend and promises insights into greenhouse gas changes over millions ...
Nov. 4, 2025 — When Surtsey erupted from the sea in 1963, it became a living experiment in how life begins anew. Decades later, scientists discovered that the plants colonizing this young island weren’t carried by the wind or floating on ocean currents, but ...
Nov. 4, 2025 — Once considered geologically impossible, earthquakes in stable regions like Utah and Groningen can actually occur due to long-inactive faults that slowly “heal” and strengthen over millions of years. When reactivated—often by human ...
Nov. 4, 2025 — Even with futuristic geoengineering methods like Stratospheric Aerosol Injection, the fate of wine, coffee, and cacao crops remains uncertain. Scientists found that while this intervention could ...
Nov. 4, 2025 — Beneath the ocean’s surface, bacteria have evolved specialized enzymes that can digest PET plastic, the material used in bottles and clothes. Researchers at KAUST discovered that a unique molecular signature distinguishes enzymes capable of ...
Latest Headlines
updated 12:56 pm ET
Nov. 3, 2025 — In the Gulf of California, a pod of orcas known as Moctezuma’s pod has developed a chillingly precise technique for hunting young great white sharks — flipping them upside down to paralyze and ...
Nov. 3, 2025 — Bamboo tissue paper, often marketed as an eco-friendly alternative, may not be as green as consumers think. Researchers at NC State University found that while bamboo fibers themselves are not more ...
Nov. 3, 2025 — UIC researchers predict that the Sahara Desert could see up to 75% more rain by the end of this century due to rising global temperatures. Using 40 climate models, the team found widespread ...
Nov. 3, 2025 — Astronomers observed a massive, multi-temperature plasma eruption from a young Sun-like star, revealing how early solar explosions could shape planets. These fierce events may have influenced the ...
Nov. 2, 2025 — UC Davis scientists uncovered Aptostichus ramirezae, a new trapdoor spider species living under California’s dunes. Genetic analysis revealed it was distinct from its close relative, Aptostichus ...
Nov. 2, 2025 — Earth’s climate balance isn’t just governed by the slow weathering of silicate rocks, which capture carbon and stabilize temperature over eons. New research reveals that biological and oceanic ...
Nov. 2, 2025 — Researchers uncovered that trace compounds like nickel and urea may have delayed Earth’s oxygenation for millions of years. Experiments mimicking early Earth revealed how their concentrations ...
Nov. 2, 2025 — Researchers discovered that soil microbes in Kansas carry drought “memories” that affect how plants grow and survive. Native plants showed stronger responses to these microbial legacies than ...
Oct. 31, 2025 — The Taurid meteor shower, born from Comet Encke, delights skywatchers but may conceal hidden risks. Research led by Mark Boslough examines potential Taurid swarms that could increase impact danger in ...
Oct. 31, 2025 — Earth’s magnetosphere, once thought to have a simple electric polarity pattern, has revealed a surprising twist. New satellite data and advanced simulations show that the morning side of the ...