Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA Sees Tropical Storm Unala Develop and Weaken Quickly

20.08.2013
NASA's Aqua satellite has been busy capturing temperature data from developing tropical cyclones around the world.

Aqua captured an image of Tropical Storm Unala in the central Pacific Ocean where it formed early today, Aug. 19. Over several hours, Unala moved into the northwestern Pacific where it quickly weakened to a depression.


Cloud top temperatures in thunderstorms circling Tropical Storm Unala's (right) center on Aug. 19 at 0105 UTC were colder than -63F/-52C, indicating strong storms with heavy rain potential. Typhoon Pewa's (left) cloud tops were colder. Image Credit: NASA JPL, Ed Olsen

NASA's Aqua satellite caught Unala in the same image as Typhoon Storm Pewa, which is responsible for Unala's quick weakening. The two tropical cyclones are just 184 nautical miles apart and are expected to be just 60 miles from each other later today (Aug. 19).

The Atmospheric Infrared Sounder or AIRS instrument captures infrared data and scientists are able to measure cloud top temperatures of storms, and surrounding sea surface temperatures: two factors that are important in understanding what's happening or will happen with tropical cyclones.

Tropical cyclones need sea surface temperatures of at least 26.6C/80F to survive and thrive, and temperatures in the vicinity of Tropical Depression Unala are at least that warm. Cloud top temperatures in the thunderstorms that make up tropical cyclones tell scientists how high the cloud tops are in the troposphere, and the higher the storm, the colder it is, and the stronger it is.

Cloud top temperatures in thunderstorms circling Unala's center early on Aug. 19 were around -63F/-52C, indicating there were some strong storms with heavy rain potential, but those cloud tops warmed later in the day, indicating weakening. Storms in nearby Pewa showed colder temperatures, and Pewa has since become a typhoon.

At 1500 UTC/11 a.m. EDT on Aug. 19, Tropical Depression Unala had maximum sustained winds near 30 knots/34.5 mph/55.5 kph, after peaking earlier in the day at 40 mph/65 kph. The center of Unala was located near latitude 17.3 north, longitude 178.1 west, about 705 nautical miles east of Wake Island. The estimated minimum central pressure is 1008 millibars. Unala was moving toward the west near 20 mph/32 kph, and this general motion is expected to continue for the next day.

Forecasters at the Central Pacific Hurricane Center noted that the interaction between Unala and Typhoon Pewa is expected to cause Unala to weaken more and dissipate within 24 hours.

Text credit: Rob Gutro
NASA's Goddard Space Flight Center

Rob Gutro | EurekAlert!
Further information:
http://www.nasa.gov
http://www.nasa.gov/content/goddard/unala-northwestern-pacific-ocean/

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Cholesterol-lowering drugs may fight infectious disease

22.08.2017 | Health and Medicine

Meter-sized single-crystal graphene growth becomes possible

22.08.2017 | Materials Sciences

Repairing damaged hearts with self-healing heart cells

22.08.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>