Articles tagged with Troposphere
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A new dual-field-of-view polarisation lidar technology allows for robust and accurate microphysical information on clouds, enabling scientists to investigate interactions between aerosols and clouds. The technology has been adopted by other groups worldwide and provides insights into climate development.
Researchers at Kyushu University found that rising CO2 levels in the atmosphere may lead to disruptions in shortwave radio communications, including systems used for air traffic control and maritime communication. The ionosphere's cooling due to global warming causes a decrease in air density and accelerates wind circulation.
Researchers at the University of Tsukuba found that 2023 marine heatwaves significantly exacerbated the record-breaking East Asian summer heatwave. The study revealed that changes in cloud cover and water vapor enhanced solar radiation reaching the ground, amplifying surface temperatures.
A new study uses Artificial Intelligence to refine coarse atmospheric data into sharper 3D humidity maps, reducing errors by more than half. The approach also offers transparency, revealing where the AI
Researchers have discovered that urban areas experience a greater difference in wet bulb globe temperature between 0.5 m and 1.5 m above ground due to surface heat radiation, posing health risks to children and pets during extreme heat events. Total solar eclipses also alter atmospheric conditions and insect behavior, with some species...
Research reveals the mechanism behind peak extratropical cyclone activity in spring East Asia, with intensified low-level jet streams facilitating system formation. This understanding can improve climate predictions and adaptation strategies for the region.
The Amazon rainforest is a significant source of condensation nuclei for clouds, according to two studies. The rainforest's plant transpiration and thunderstorms produce aerosol particles that can be transported thousands of kilometers, influencing marine cloud formation.
A recent study published in Nature found that isoprene, a naturally occurring organic compound emitted by vegetation, significantly contributes to the formation of new particles in the upper troposphere. Isoprene oxygenated organic molecules can rapidly form new particles under certain conditions.
Tree-ring data reveal that periodic shifts in strong winds high above the Earth's surface have driven opposite climates in different parts of Europe for the past 700 years. This research provides critical data to improve climate models, comparing past patterns to current trends and societal impacts.
A recent study by ISGlobal found a vast range of viable bacteria and fungi transported by air masses from northeast China to Japan, some potentially pathogenic to humans. The research team identified over 266 fungal and 305 bacterial genera in aerosol samples, including species resistant to commonly used antibiotics.
MIT researchers detected a clear signal of human influence on upper tropospheric ozone trends, separate from climate noise. The study provides insights into specific human activities driving this trend.
Researchers at Washington University in St. Louis have found a new mechanism that produces a significant amount of particles in the Earth's atmosphere, which could impact climate change and weather patterns. The discovery suggests that stratospheric air intrusions play a crucial role in forming these particles.
A team of researchers found that air turbulence in the thermosphere exhibits the same physical laws as wind in the lower atmosphere, leading to a new unified principle for Earth's environmental systems. This discovery can potentially improve future forecasting of both Earth and space weather.
The University of Washington's STRIVE project aims to understand the troposphere and stratosphere, where the ozone layer resides, and their interface. This will help monitor changes in the ozone layer, air quality, and climate processes.
Satellite-based inversion system shows consistent decline in China's NOx emissions from 2020-2022, largely due to stringent air pollution controls. The industrial and transportation sectors accounted for more than 70% of the total reduction.
An international team of scientists has made the first clear evidence of Criegee intermediate reactions driving secondary organic aerosol formation in the troposphere. The findings significantly expand our understanding of one potentially significant pathway for SOA formation.
Researchers uncover significant variations in Slant Path Delays across different azimuth angles, challenging isotropic assumptions. The discovery highlights the need for new models that accurately represent complex tropospheric dynamics.
In the wake of Hurricane Harvey's record flooding, researchers discovered a unique form of evolutionary change called spatial sorting that dominated the evolution of Jadera haematoloma bugs. This rapid adaptation allowed them to access seeds on goldenrain trees, outcompeting native species with longer beaks.
A new study reveals the connection between Arctic daily warming and equator region as well as Atlantic storms, shedding light on the impact of North Atlantic Oscillation (NAO) and El Niño-Southern Oscillation (ENSO) on the phenomenon. The research provides a new perspective on weather and climate changes in the Arctic.
A study by the University of Helsinki found that oxidized organic molecules from Amazon rainforests contribute to the formation of aerosol particles in the tropical free troposphere. These molecules, primarily composed of isoprene, can nucleate or condense on nanoparticles, impacting cloud formation and global climate.
Researchers used the parallax effect to measure the height of the volcano's plume, reaching an altitude of 57 km, surpassing previous records. The study provides new insights into volcanic eruptions and their impact on the climate.
Research team from Goethe University reproduces Asian monsoon conditions in experimental chamber, identifying increased aerosol particle formation. The study found that ice clouds can form under lower water vapour supersaturation than anticipated, affecting climate models' accuracy.
A recent study by Pacific Northwest National Laboratory researchers reveals a previously unknown atmospheric phenomenon over the Amazon rainforest, driven by plant-foliage-derived gases. These gases condense to form fine particles that cool the planet and seed clouds, affecting precipitation and the water cycle.
A new study questions a widely-held theory that sudden stratospheric warming caused the extreme cold weather in Texas and other parts of the US. The research suggests that the polar vortex's disruption, which occurred six weeks after the initial warming event, was not significant enough to impact the weather.
A new study by University of Helsinki researchers shows that boreal forests can mitigate climate change through aerosol formation and growth, influencing cloud properties and regional climate. The study found that aerosol particles produced by the forests alter cloud reflectivity, potentially cooling the climate.
The tropopause is rising at a steady pace since 1980 due to human-induced warming of the lower atmosphere. This trend continues even as stratospheric temperatures stabilize after ozone depletion efforts.
Researchers at Stanford University have discovered the physical mechanism behind icy plumes that precede severe thunderstorms and potentially deadly tornadoes. The study reveals a hydraulic jump phenomenon triggered by fluid obstacles in the atmosphere, leading to rapid water vapor injection into the stratosphere.
Researchers analyzed 25 years of Antarctic data, finding that ozone levels near the ground have risen by up to 0.14 ppb per year, primarily driven by natural and human sources. This increase can have negative impacts on the region in the future due to ozone's ability to trap heat near Earth's surface.
Researchers analyzed 25,766 film tropes and identified 42 cluster groups, with some associated with specific genres and high ratings. The study provides insights into the film industry's narrative patterns, potentially informing new film development and story generation.
Dust aerosol optical depth negatively affects cloud water in the lower troposphere. This change can alter atmospheric enthalpy surrounding a tropical cyclone, influencing its intensity. Dr. Zhang's study suggests that anomalous enthalpy changes are related to dust AOD conditions in eastern Pacific TCs.
Researchers used in situ observations and simulations to understand the composition and sources of aerosols in the Asian Tropopause Aerosol Layer (ATAL). They found that part of the aerosols were transported from the Earth surface and upper troposphere, influencing the ATAL's formation.
Satellite images from NASA's Terra Satellite confirmed Hurricane Lorenzo as a major hurricane with a clear eye and solid structure of thunderstorms. The storm is moving north-northwest at 14 mph, with maximum sustained winds near 145 mph.
Tropical Depression 13W has triggered warnings in the Philippines due to its location and potential for heavy rainfall. The NASA Terra satellite used infrared light to analyze storm strength, finding strongest storms with cloud top temperatures as cold as -80 degrees Fahrenheit.
The study used balloon-borne measurements to investigate dust particles in the free troposphere over a Chinese desert region. The findings suggest that mineral particles from desert areas have a local influence and are transported long distances, with coarse-mode particles dominating the size distribution.
Research team at Michigan Tech found wildfire aerosol particles remaining in atmosphere for up to a week, defying expectations of rapid oxidation. This discovery has significant implications for climate predictions and the role of aerosols in global warming.
Hurricane Norman's strongest thunderstorms are located southeast of its center, with cloud top temperatures as cold as minus 80 degrees Fahrenheit. This indicates the potential for heavy rain generation, and the storm is expected to remain powerful through next week.
Researchers at the University of Oklahoma are investigating tropopause polar vortices, which limit predictability in the Arctic. The team aims to develop new models and strategies to better understand TPVs and their impact on weather events.
Tropical Depression Mawar is getting better organized with cloud top temperatures reaching -63 degrees Fahrenheit, indicating stronger storms. The depression is expected to intensify and make landfall near Hong Kong on September 3.
Typhoon Sanvu intensified into a powerful storm with cloud top temperatures as low as minus 63 degrees Fahrenheit, indicating strong storm potential. NASA predicts the typhoon will continue to strengthen and become extra-tropical near the Kuril Islands before reaching Russia's coast.
Hurricane Gert is being affected by strong wind shear, causing it to become elongated. The storm's convective structure has rapidly deteriorated due to cold sea surface temperatures and increasing vertical wind shear.
Typhoon Banyan is experiencing strong wind shear, causing its strongest thunderstorms to be blown northeast of the center. The storm is weakening, with maximum sustained winds dropping to 75 mph, and is moving at a speed of 37 mph.
The Atmospheric Infrared Sounder instrument detected very cold cloud top temperatures exceeding minus 63 degrees Fahrenheit, suggesting the presence of intense thunderstorms that can generate heavy rain. The hurricane's center was located near Bermuda and Halifax, Nova Scotia, with forecasted strengthening and weakening phases.
Tropical Storm Nalgae showed coldest cloud tops east of its center at -63 degrees Fahrenheit, generating heavy rainfall. The storm is forecast to strengthen and turn north-northeast.
A recent study reveals that the global warming hiatus from 1998 to 2013 was dominated by decreasing surface latent heat flux and cloud-related processes. The researchers found that atmospheric dynamics are coupled with surface turbulent heat fluxes over lower troposphere and coupled with cloud processes over upper troposphere.
The 2016 Quadrennial Ozone Symposium presented findings on trends of ozone in the stratosphere and troposphere. Emerging techniques for ozone observations were also discussed, as well as effects of ozone on human health and ecosystems.
Researchers detected high concentrations of ammonia in the upper troposphere over the Asian monsoon, suggesting a significant role in aerosol formation and potential cooling effect on the atmosphere. The findings provide new insights into the vertical distribution of atmospheric ammonia.
Tropical Depression Madeline showed a small burst of strength with strong thunderstorms developing near its center. Cloud top temperatures indicated storms stretching high into the troposphere and generating heavy rain.
Tropical Depression 9 is bringing torrential rains to western Cuba and issuing a tropical storm watch for parts of the Florida Gulf Coast. Infrared data indicates extremely cold cloud tops, indicating heavy rainfall potential.
Hurricane Frank showed a transition from weakening to strengthening phases, with cloud top temperatures warming on July 25 and cooling on July 26. The storm's winds were measured by NASA's RapidScat instrument, which found tropical-storm-force winds extending outward up to 70 miles.
Researchers from GEOMAR found a direct relationship between decadal variations in Pacific Ocean temperatures and the tropical tropopause, which regulates water vapor content. This discovery contradicts earlier hypotheses that human influences dominate climate variability.
NASA's Aqua satellite detected coldest cloud top temperatures between minus 60 and 70 degrees Fahrenheit, indicating strong storms remained north of Tropical Storm Darby's center. The storms are expected to generate heavy rainfall due to their high altitude in the troposphere.
Scientists have found that tropical fires in Southeast Asia and Africa are responsible for high ozone concentrations in the air above the western Pacific Ocean. The ozone is a byproduct of burning organic material, which is transported thousands of miles away by winds.
Tropical Cyclone Uriah strengthened into a hurricane due to weakening wind shear, according to NASA's Aqua satellite imagery. The storm's cloud top temperatures reached -63 degrees Fahrenheit, indicating high rainfall potential.
Scientists have detected a monstrous new cloud of frozen compounds in the moon's low- to mid-stratosphere, peaking at an altitude of about 124 miles. This discovery provides insight into the nature and severity of Titan's winter, which is expected to be harsher than its northern counterpart.
A new Atlantic tropical depression formed on September 28, with cloud top temperatures reaching -63 Fahrenheit/-53 Celsius, indicating potential heavy rainfall. The National Hurricane Center forecasts the depression to strengthen into a tropical storm later in the day.
The Suomi NPP satellite observed a large and elongated circulation of Tropical Storm Dujuan, with cloud top temperatures as cold as -63F/-53C indicating strong storms. The storm is expected to intensify and reach peak winds of 110 knots on September 27-28.
NASA's Aqua satellite captures powerful thunderstorms and cloud top temperatures around -63F/-53C in Tropical Depression 20W, indicating potential for heavy rainfall. The storm is expected to strengthen and potentially affect the Northern Marianas Islands and Japan by September 19.
Hurricane Kilo is a category four hurricane with maximum sustained winds near 135 mph, moving north-northwest at 10 mph. The storm is expected to cross the International Date Line into the Northwest Pacific Ocean later on August 31.
The Suomi NPP satellite gathered infrared data on Typhoon Goni, showing the strongest thunderstorms in its eastern and southern quadrants. The storm maintained a convective signature despite weakening uplift, with winds near 115mph and a Category Three rating.
Researchers confirm strong warming in the upper troposphere, known as the tropospheric hotspot, using publicly available temperature and wind data set. The study reveals a 10% increase in winds over the Southern Ocean, suggesting ozone depletion may be responsible.