Articles tagged with Topography
Scientists have identified a mechanism by which deep waters may rise to the surface through turbulence generated by underwater topographic features. This finding could help estimate how long the ocean stores carbon in its deepest regions before returning it to the surface.
The deep meridional overturning circulation (MOC) in the South China Sea has made significant progress, driven by the Luzon Strait overflow and enhanced cyclonic circulation. The study reveals an unclosed 'sandwich' structure with upwelling areas primarily located in slope regions.
Recent studies investigated two local heavy rainfall events in Beijing Metropolitan Region, revealing that cold pool outflows and urban surface played key roles. The development of convective storms was facilitated by a favorable convergence zone near the border of northwestward-concaved valleys and urban surfaces.
Researchers studied SCSSM onset from 1997 to 2014, identifying normal, intermittent, and delayed onset types. Key factors in the normal onset type include positive SST gradients in the northern Indian Ocean and local SST warming in the SCS. The study found that zonal thermal contrast modulates monsoon onset in La Niña years.
Researchers built a stream table experiment to test a theory about the erosion of the Tarim Basin's flat surfaces. They found that channel switching played a crucial role in beveling these areas due to rapid changes in sediment flux and water flow. The study provides insights into the geological history of the region.
Two new Geosphere articles reveal the geological history of a major ignimbrite flare-up in the Central Andes, providing insights into the formation of geothermal energy resources. Researchers also study a distinct style of arc volcanism linked to slab-rollback and its impact on continental margins.
Researchers at Lehigh University and City University of Hong Kong have discovered a way to control liquid droplet movement on extremely hot surfaces, utilizing microscale topographical features. This breakthrough could improve technologies such as power plant reactors and water management systems by reducing cooling time.
New research reveals how mountain ranges on New Zealand's South Island directly impacted the evolution of diverse freshwater fish species. The study shows that the island's landscape developed in six main tectonic zones, each with distinct river drainage catchments, which led to divergent fish DNA sequences over time.
Researchers found that cold, steep slopes produce coarser sediment than gentle slopes, suggesting variations in climate, topography, and weathering rates shape mountain landscapes. This discovery quantifies the relationship between sediment size and erosion rates, providing new insights into the interplay of climate and tectonics.
Scientists estimate volume of open pore space in subsurface using geophysical surveys and computer models, revealing new theoretical framework for understanding watershed porosity. The study predicts distribution of pore space based on stress in the earth's crust, with implications for streamflow, aquifer systems, and landscape evolution.
Scientists developed a model that estimates the thickness of Earth's 'critical zone' given topography, gravity, and plate tectonics. The results show that bedrock weathering varies with tectonic compression, influencing the diversity of terrestrial life.
A new study by Alexander Simms and colleagues reveals that uplift rates across the Pacific Coast have been overestimated by an average of 40%, implying a slower rate of shoreline rise. This finding has important implications for coastal management, including earthquake hazards and sea-level rise impacts.
Researchers examine the Loa River system and its impact on water scarcity, highlighting the need for sustainable long-term management. The study identifies areas where deeply buried aquifers exchange water with shallow ones or discharge to surface water systems.
Researchers used high-tech instruments to map canopy chemistry in the Amazon, finding that plants in different areas produce unique chemicals based on topography. The study reveals a hidden tapestry of chemical variation, highlighting the importance of geography in shaping ecosystem functions.
A University of Texas at Arlington assistant professor will study the vertical movements that formed the Rockies' present topography and the influence of topography on climate. A geo-camp for local high school students traditionally underrepresented in science will also be conducted to fuel student interest in geosciences.
Geologists have figured out what caused the Alaska Range to form its distinctive topography and why it boasts such an enigmatic signature. The narrow mountain range's high peaks are built from previously fractured rock units, driven by movement along the Denali fault.
Desert streams have surprisingly simple topography despite being shaped by flash flooding, according to researchers from UCSB's Earth Research Institute. The stream's form is maintained by complex interactions among rainstorms, sediment flows, and sediment grains present on the riverbed.
A new study by researchers at UC Santa Cruz shows that most of the moon's overall shape can be explained by tidal effects acting early in the moon's history. The results provide insights into the moon's early history, its orbital evolution, and its current orientation in the sky.
Researchers found the plateau's southeast margin was 600 miles longer in the Eocene epoch, upending a popular model for its formation. This discovery suggests that river capture and drainage reorganization must have been the result of a slip on major faults bounding the plateau margin.
A new study reveals that the Atlas Mountains are floating on a layer of superhot rock, challenging the traditional model of mountain structure. The researchers used seismometers to measure the thickness of the lithosphere beneath the mountains and found it to be only about 35 km deep.
Researchers used Kauai's unique rainfall gradient to test the relationship between precipitation and erosion, finding a strong correlation between rainfall rates and erosion rates. They also found that factoring precipitation into a widely used mathematical formula improved accuracy in predicting erosion rates.
Researchers found that a region in western North Carolina experienced a geological 'facelift' around 8 million years ago, with gentle hills and abundant waterfalls forming where steeper terrain existed previously. This uplift is attributed to the earth's mantle, which can well up and push the crust upward.
New research reveals that topographic relief in the southern Appalachians increased by over 150% since the Miocene era, suggesting a link to post-orogenic regional uplift. The findings contradict previous theories attributing landscape rejuvenation to climate change or erosion, instead supporting an epeirogenic uplift-driven explanation.
Researchers at CU-Boulder have discovered that the western Grand Canyon was largely carved out of its current depth by about 70 million years ago, during the time of the dinosaurs. This new date challenges the conventional understanding of the canyon's formation and suggests a more complex history of geological events.
Two new studies provide insights into the formation of the European Alps and ancient sanukitoids. Reconstructing pre-glacial topography reveals most glacial erosion occurred in lower parts of the Alpine catchments, while aseismic creep has begun on major strike-slip faults like the North Anatolian Fault.
Researchers developed a new optical technique to monitor and control nanoscale topography during semiconductor etching. This allows for precise control over the dimensions of devices, improving performance, speed, error rate, and time to failure.
Researchers suggest that the Tibetan Plateau's growth of high topography began around 30 million years ago, contrary to previously held beliefs. This new finding was made possible by analyzing samples from the eastern edge of the plateau using various geological methods.
Researchers found that a 'merging tsunami' doubled in intensity over rugged ocean ridges, amplifying its destructive power before reaching shore. This discovery helps explain how tsunamis can cross ocean basins to cause massive destruction at some locations while leaving others unscathed.
Researchers are using data from a Utah mountainous region to better understand the effects of topography on earthquake ground motions and seismic risk. The project aims to develop design-ready tools to account for these effects, potentially leading to modified building codes.
Researchers used clinker deposits and U-Th/He isotopic dating to determine the pace of recent evolution in the Powder River Basin. The study found that the basin has experienced increasing incision and topographic relief over the last million years, with rates of up to 0.3 km/million years.
A Syracuse University research team has created a temperature-sensitive shape memory polymer substrate that can change shape under cell-compatible conditions. The breakthrough, led by James Henderson and Kevin Davis, offers potential solutions for current limitations of static substrate research in bioengineering.
Researchers found that the wave of mountain building swept down western North America as far south as Mexico and as far east as Nebraska. The data, from ancient precipitation, suggests a slow-motion wave of mountain-building coursing southward, with elevations up to 14,000 feet.
A railroad bypassed the first black-founded town in the United States, New Philadelphia, Illinois, to avoid expensive iron rails. The town's location proved more favorable for a straight route, but a shallow creek required a curved detour that increased construction costs.
Research in the Journal of Tissue Engineering reveals that stem cells detect surface features with mechanosensors, which modulate gene expression through biochemical signaling cascades. This understanding opens doors to develop improved clinical prostheses with topographies that directly modulate stem cell fate.
Dr. George Papanicolaou receives the William Benter Prize for his work on Monte Carlo simulation and its applications in imaging analysis, tackling challenges in cluttered environments. The award supports his efforts to develop effective algorithms for detecting and imaging in varying degrees of clutter.
Researchers developed novel probe technology that replaces conventional AFM cantilevers, enabling fast topographic imaging, quantitative material characterization, and single molecule mechanics measurements. These probes can simultaneously measure material properties like adhesion, stiffness, elasticity, and viscosity.
Scientists found a potential reason for Greenland's ice melting: a thin spot in the Earth's crust enabling underground magma to heat the ice. The researchers believe this hotspot could be lubricating the base of the ice sheet, causing it to slide more rapidly out to sea.
Researchers can now predict where tropical storms and hurricanes will dump the most rain — even days after — and hundreds of miles away from landfall. The new tools, developed by Corene Matyas, use geographical information systems (GIS) to model rainfall patterns based on storm intensity, distance inland, and landscape topography.
A Princeton University study finds that healthy coral reefs offer at least twice as much protection from destructive tsunami waves as dead reefs. The study uses a computer model to simulate the impact of tsunamis on reef-bounded shorelines, providing quantitative confirmation of a widely held theory.
Researchers developed a new X-ray diffraction imaging technique to study crystal defects in strained silicon films. The technique reveals that defects created at the interface between layers propagate through the film, affecting its performance. This discovery could improve the manufacturing process for high-performance transistors.
Researchers at Georgia Tech have created a highly sensitive atomic force microscopy (AFM) technology called FIRAT, capable of high-speed imaging 100 times faster than current AFM. FIRAT can capture material property imaging and parallel molecular assays for drug screening and discovery.
Using a new geochemical tool, researchers documented how fast glaciers eroded the Coast Mountains of British Columbia, finding rates six times faster than rivers and landslides. Glaciers scraped at least 2 kilometers of rock from mountains around 1.8 million years ago, shaping the landscape.
Researchers developed a tool that combines atomic force microscopy (AFM) with scanning electrochemical microscopy (SECM) to monitor both topography and biochemical activity simultaneously. The technology promises to be valuable for various biomedical and biotechnological applications, including studying cystic fibrosis.
A hidden fault under Marin County, California, could significantly increase the earthquake risk in the San Francisco Bay Area. Researchers believe that a blind thrust fault, which is difficult to detect until an earthquake occurs, may be transferring motion from the northern Hayward fault to the San Andreas fault.