Articles tagged with Wind Speed
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Research led by Devon Burr shows that Titan's winds must blow faster than previously thought to move sand, explaining the formation of massive dunes. The discovery validates older models for thin atmospheres like comets and asteroids.
NASA's ISS-RapidScat tracked the winds of post-tropical cyclone Nuri as it moved parallel to Japan. The storm is now expected to bring strong winds and rough seas to Alaska's Aleutian Islands.
A 15-year study found thousands of birds are attracted to artificial lights during their first flights, leading to high mortality rates. Turning street lights off decreased the number of grounded fledglings, suggesting a link between light pollution and bird deaths.
NASA-NOAA's Suomi NPP and Aqua satellites monitored Typhoon Vongfong's weakening, showing strongest thunderstorms in the northern quadrant. The storm is now forecasted to spread out and become an extra-tropical storm, tracking over Japan's islands.
The Global Precipitation Measurement satellite captured an unusual compact eyewall in Hurricane Simon, which later intensified rapidly. The satellite's radar detected a powerful convective cell with unusually high radar-reflectivity signals.
The Simulator for Wind Farm Applications (SOWFA) tool simulates complex variables to optimize wind farm energy production. It enables developers to improve individual turbine performance and reduce wake losses, potentially cutting costs by billions of dollars.
A new statistical model complements hurricane forecasting by showing the size of storms, not just wind speed. This metric allows forecasters to better assess the risk of hurricanes that make landfall.
Researchers mapped water trends in African maize-growing areas between 1979 and 2010, finding increases in water availability during the growing season. However, some regions experienced declines due to decreased evaporative demand and changing rainfall patterns.
Researchers found a slight increase in lower back pain risk with higher wind speed but it was not clinically significant. This contradicts previous studies that linked cold or humid weather to increased symptoms.
Researchers propose building three east-west great walls to eliminate the major tornado threat in Tornado Alley. The walls, inspired by Jiang-Huai Hills in China, can be built locally at high-risk areas and gradually extended to cover the entire region.
Researchers have discovered a rapidly moving gas streamer blocking X-rays from the galaxy's nucleus, indicating a significant decrease in radiation. This phenomenon may regulate the growth of both the supermassive black hole and its host galaxy.
An international team of astronomers discovered a clumpy gas stream flowing quickly outward and blocking 90 percent of the X-rays emitted by the supermassive black hole at the center of the galaxy NGC 5548. The researchers believe this activity provides new insights into the interaction of supermassive black holes and their host galaxies.
Researchers detected a clumpy gas stream flowing quickly outwards and blocking X-rays emitted by the supermassive black hole. The discovery provides direct evidence for the shielding process that accelerates powerful gas streams, offering insights into how black holes interact with their host galaxies.
Wind speeds on migration predicted annual survival, male arrival date, female egg laying, and productivity of yellow warblers. Higher westerly wind speeds associated with lower apparent annual survival due to increased in-flight mortality risk.
A novel plasma actuator improves plasma authority at high wind speeds, suppressing boundary layer separation and reducing model vibration on a UAV. The study demonstrates an important role of plasma actuators in real applications.
A recent study by Caltech researchers found that fruit flies use their antennae to quickly sense changes in wind speed, helping them maintain a steady groundspeed. The findings suggest the antennae are responsible for initial deceleration in headwinds and provide critical information to help the fly regain its original speed.
Tropical Cyclone Gillian reached Category 5 hurricane status with winds of over 140 knots when NASA's TRMM satellite passed overhead on March 23. Data analysis revealed intense storms and heavy rainfall, but the storm weakened to a tropical storm by March 26.
A powerful storm system brought drastic temperature changes to the Mid-Atlantic and Northeastern US, with Washington D.C. experiencing a 40-degree drop in daytime temperatures and Buffalo, NY receiving 13.8 inches of snow.
A Stanford-led study found that large arrays of offshore wind turbines can disrupt hurricanes enough to reduce peak wind speeds by up to 92 mph. The turbines' energy extraction also decreases storm surge by up to 79 percent.
A mathematical model recreated the positions and movements of individual emperor penguins in a huddle, showing that an individual penguin only needs to move 2 cm for its neighbor to react. The model revealed how travelling waves propagate through the entire huddle, keeping it dense and protecting the birds from the cold.
The NASA HS3 mission has revealed that Tropical Storm Humberto had a hybrid core structure, characterized by both warm and cold cores at different levels. This discovery provides new insights into the processes underlying hurricane formation and intensity change in the Atlantic Ocean basin.
Wind shear significantly altered the rainfall pattern of Tropical Storm Gabrielle, with intense storms southeast of Bermuda receiving heavy rain. The storm is expected to weaken due to continued wind shear, which disrupts the heat engine and tilts the circulation center.
Scientists tracked the Chelyabinsk meteor plume using NASA satellite data, observing its formation of a thin stratospheric dust belt. The plume evolved as it moved around the Northern Hemisphere, with different particles experiencing varying wind speeds.
Scientists have developed a new technique to calculate wind speeds of hurricanes using distorted GPS satellite signals, providing valuable information at little additional cost. The method offers a broader view of wind speeds than traditional dropsonde measurements, which are expensive and only available over large bodies of water.
Tropical Storm Yagi developed over the weekend of June 8 and 9 in the Western North Pacific. The storm's heaviest rain fell south of its center, with rates reaching up to 1.2 inches per hour.
Cyclone Mahasen brought heavy rainfall to southern Bangladesh, with the TRMM satellite capturing areas of intense thunderstorms north of the storm's center. The cyclone is expected to weaken and move across northeastern India due to rugged terrain and strong wind shear.
Researchers propose a new strategy to optimize power-generation efficiency in fluctuating wind conditions by predicting maximum turbine generation capacity and incorporating various factors. The approach shows promise in improving power-generation efficiency, but further refinement is needed based on local conditions.
A study found that social ties have a stronger effect on content generation than the reverse, leading to a self-reinforcing cycle of network growth. Researchers suggest that incentivizing user connections through better tools can increase ad revenue.
Researchers found average wind speeds declined by 15% inland while remaining steady on the coast. Climate change and urbanization are potential factors contributing to this trend.
Tropical Storm Ewiniar's clouds revealed a partially exposed low-level circulation center, open to outside winds that can affect its trajectory. Heavy rainfall and thunderstorms, with the strongest on the eastern quadrant, were observed around the storm.
Hurricane Lane's eye has become cloud-filled, resembling being punched in the eye, due to powerful thunderstorms surrounding it. Cooler waters and increased wind shear are forecast to weaken the storm further, leading to its eventual dissipation by Wednesday.
A new study suggests that wind power has plenty of potential to meet half the world's power demand by 2030, with a capacity to exceed demand by several times. Researchers used a sophisticated climate model to calculate the theoretical maximum wind power potential on Earth.
Researchers studied the effects of wind speed, altitude, and other environmental factors on athletic performance. They found that a tailwind of 2 meters per second and racing at an altitude of 999 meters could improve Usain Bolt's record time to 9.48 seconds.
Tropical Storm Khanun is expected to increase in power and affect South and North Korea as it moves northward through the Yellow Sea. The TRMM satellite provided a 3-D view of Khanun's rainfall structure, showing powerful convective storms near the center pushing to heights of about 17 kilometers.
A powerful summer derecho moved from Illinois to the Mid-Atlantic states, bringing destruction and wind gusts of up to 90 mph. NASA satellites captured the event's progression and aftermath, including extensive power outages and massive blackouts.
Researchers developed a biologically inspired control system that uses memory of past control experiences and outcomes to generate new actions. This approach shows promise for enhancing wind power conversion efficiency, outperforming traditional methods in simulations.
Scientists will gather data on the high-altitude jet stream, which affects satellite and radio communications, using chemical tracers and instrumented payloads. The mission will help better understand the process responsible for this phenomenon, located 60-65 miles above the Earth's surface.
Tropical Storm Cyril has strengthened since February 6, maintaining a compact shape with maximum sustained winds near 45 knots. The storm is moving southeast at 28 knots, forecast to dissipate in two days due to cooler sea surface temperatures.
Researchers found that power generated at a set wind speed is higher under stable conditions and lower under strongly unsteady conditions. Wind shear plays an important role in assessing turbine efficiency. The team's study provides valuable insights for better estimating power generation, especially when including atmospheric stabilit...
A new study from CSIRO Australia has found that Australia's average wind speed is increasing, contrary to recent international studies showing a decrease. The research provides valuable insights into the causes of variations in near-surface wind and long-term wind speed trends over Australia.
Researchers at Hebrew U. warn that climate change may cause many tree species with wind-dispersed seeds to become extinct due to reduced wind speed and increased seed production. This could lead to a slower spread of trees than expected, making them vulnerable to extinction.
Researchers measured carbon dioxide fluxes in the North Atlantic using an autonomous system, making nearly 4,000 flux measurements. The study found that formation of bubbles in breaking waves may increase gas transfer at high wind speeds.
A study by Diandong Ren finds that rising global temperatures decrease wind speeds, reducing the power output of wind turbines. This means that more wind turbines are needed to achieve the same amount of energy production, highlighting the need for a switch to renewable energy sources earlier.
A study published in Frontiers in Ecology and the Environment found that raising wind turbine cut-in speeds to 11 mph reduces bat fatalities by 44-93% and annual power loss by less than 1%. This change limits turbines to operating only during higher wind speeds, minimizing bat collisions.
Cyclone Giri made landfall in Burma as a Category Four cyclone, bringing powerful winds and heavy rainfall. The storm's eye was approximately 20 nautical miles wide, with wind speeds reaching up to 155 mph.
Hurricane Igor is expanding in eastern Canada, prompting hurricane watches for the region. The storm's diameter has grown to 920 miles, with maximum sustained winds near 75 mph and heavy rainfall possible over Newfoundland.
Researchers developed a Hurricane Risk Calculator to estimate extreme wind speeds at specific locations in Florida. The calculator found that cities like Miami are more vulnerable to strong winds due to their geography and location.
Scientists at the University of Reading in the UK have created a kite-based system to measure wind speed with high accuracy. By attaching a strain gauge to a kite's tether line, researchers found that the tension in the line is linearly related to wind speed, making it a potential tool for atmospheric research.
Scientists at the University of Manchester have discovered how male common snipes use their outer tail feathers to produce a highly seductive drumming sound. By observing deformations in the feathers as they produce the sound, researchers found that the feathers flutter like flags in the wind.
Tropical cyclone 17P has weakened and is now a fading depression due to moderate to strong westerly vertical wind shear. The storm's organization and ability to produce thunderstorms are limited by the wind shear, leading to its expected dissipation in the next few days.
A new technology could increase wind turbine efficiency by up to 30-40% at lower wind speeds, opening up new geographic areas for wind power. The circulation control aerodynamic technique will be applied to wind turbine blades, allowing for simpler designs and increased power production.
Researchers found a significant increase in wind speed and current strength on Lake Superior, but a decrease in chlorophyll levels due to temperature stratification. This affects the lake's ecosystem and may impact airborne pollutants and nearby communities.
NASA's TRMM and QuikScat satellites provide critical data on Tropical Storm Ida's rainfall and wind patterns. The storm's center is expected to make landfall along the northern Gulf coast Tuesday morning.
A study published in BMC Public Health found that high temperatures, humidity, and low wind speed are linked to increased dengue fever cases. The authors suggest that weather conditions affect mosquito survival and flying patterns, which contribute to disease transmission.
Typhoon Lupit is forecast to move northeast, weakening due to cooler waters and wind shear. The storm will continue crawling at a slow pace, causing prolonged rain over northern Luzon this weekend.
Tropical Storm Nepartak is transitioning into an extra-tropical storm, developing frontal qualities in the northwestern Pacific Ocean. The storm's circulation will soon fade as it continues to speed northeast, with dry air in the mid-levels of the atmosphere contributing to its transformation.
Tropical Storm Henri has weakened to a depression due to battering winds and strong southwesterly shear. The National Hurricane Center confirmed the wind speed using NASA's QuikScat satellite imagery, with minimum central pressure near 1010 millibars.
Melor is now a typhoon with sustained winds near 115 knots, tracking northwestward towards Saipan and Rota. The National Weather Service warns of high surf and potential damaging winds for the Northern Marianas Islands.
Hilda's winds have slowed from tropical storm to tropical depression-force, with sustained winds near 34 mph, according to NASA satellite data. The storm is expected to continue tracking south of the Hawaiian Islands before dissipating on August 31.
A new study by LSU professor Patrick Hesp and USGS scientist David Rubin suggests that Titan's linear dunes could be formed by single-direction winds due to cohesive sediment. This alternative hypothesis has significant implications for studying Titan's composition, origin, evolution, and surface features.