A Suomi-NPP Satellite View
This night-time, infrared image of Tropical Storm Dorian was taken from the VIIRS instrument aboard the Suomi-NPP satellite on July 25 at 03:52 UTC. The red and purple areas are very high thunderstorms.
Image Credit: UWI-Madison/NASA-NOAA
NASA-NOAA's Suomi-NPP satellite flew over Tropical Storm Dorian on July 25 at 03:52 UTC (July 24 at 11:52 p.m. EDT). At that time the Visible Infrared Imager Radiometer Suite or VIIRS instrument that flies aboard the satellite captured a night-time, infrared image of Tropical Storm Dorian. VIIRS data showed that the thunderstorms that surround the center of circulation were as cold as 195 to 200 kelvin. Those frigid temperatures indicate very high thunderstorms shooting to the top of the troposphere (lowest layer of atmosphere).
VIIRS, a scanning radiometer, collects visible and infrared imagery and radiometric measurements. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo.
An Aqua Satellite View
The Atmospheric Infrared Sounder or AIRS instrument also captures infrared data and captured data on Dorian hours after VIIRS. AIRS flies aboard NASA's Aqua satellite and flew over Dorian on July 25 at 15:59 UTC (11:59 a.m. EDT). AIRS data showed that Dorian maintained strong thunderstorms around its center. AIRS also showed an extended band of fragmented thunderstorms wrapping into Dorian's center from the south and southwest.
AIRS data also showed that Dorian had moved back into warmer sea surface temperatures between 300 (80F/26.8C) and 310 Kelvin (98.3F/36.8C).
TRMM Satellite View
When NASA and the Japan Space Agency's Tropical Rainfall Measuring Mission or TRMM satellite passed over Dorian on July 26 at 01:39 UTC (9:39 p.m. EDT on July 25), the instruments aboard measured the rainfall rates occurring within the storm. Mostly light to moderate rainfall was found near Dorian's center of circulation by TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) instruments. TRMM imagery is created at NASA's Goddard Space Flight Center in Greenbelt, Md. where TRMM precipitation data is placed atop a visible/infrared image from TRMM's Visible and InfraRed Scanner to form a complete picture.
Where is Dorian?[
At 5 a.m. EDT (0900 UTC) on Friday, July 26, Dorian's maximum sustained winds had slowed to 50 mph (85 kph). The National Hurricane Center or NHC noted that Dorian has become less organized. Dorian was centered near 17.1 north latitude and 41.5 west longitude, about 1,425 miles (2,290 km) east of the Northern Leeward Islands. Dorian is moving to the west-northwest at 20 mph (32 kph). There were no warnings or watches in effect as of 5 a.m. EDT.
NHC noted that Dorian's disorganization is possibly due to a combination of southwesterly vertical wind shear and mid to upper-level dry air seen in water vapor imagery.
As the AIRS data showed on July 25, the convective area (showers and thunderstorms) has become elongated from north to south.
Dorian is expected to continue moving west-northwest and in 4 or 5 days (by Monday, July 29); NOAA forecasts take the storm over Hispaniola.Text credit: Rob Gutro
Rob Gutro | EurekAlert!
Predicting unpredictability: Information theory offers new way to read ice cores
07.12.2016 | Santa Fe Institute
Sea ice hit record lows in November
07.12.2016 | University of Colorado at Boulder
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine