Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA tracks the brief life of Tropical Cyclone Atu in the southern Pacific

02.03.2011
NASA's AIRS instrument covers Atu's Life

Tropical Cyclone Atu had a brief but memorable life last week, and NASA's Atmospheric Infrared Sounder (AIRS) instrument that flies aboard NASA's Aqua satellite captured a day-by-day look at its growth and death.


This time series of AIRS imagery shows the progression and death of Tropical Cyclone Atu. On Feb. 21 at 02:17 UTC Tropical Cyclone Atu when it was over New Caledonia and Vanuatu bringing rainfall and gusty winds. On Feb. 22 at 13:53 UTC, AIRS showed an intensifying Cyclone Atu with a developing eye. On Feb. 23 at 02:05 UTC, AIRS data showed a powerful cyclone with strong thunderstorms (purple), heavy rain and a visible eye on infrared imagery. The AIRS infrared data on Feb. 24 at 01:11 UTC showed Atu as a small rounded area of weak convection (blue). Credit: NASA/JPL, Ed Olsen

AIRS provides infrared images of atmospheric phenomena, oceans and land areas around the world. Basically, infrared data takes the temperature of these things. When NASA's Aqua satellite flew over Tropical Cyclone Atu from February 21 through the 25 it saw thunderstorm cloud tops grow colder as the clouds grew higher and thunderstorms became more powerful. When cloud top temperatures reached the threshold of -63 Fahrenheit/-52 Celsius they indicated strong thunderstorms dropping heavy rainfall. By the 25th, Atu had run into strong wind shear and had dissipated north of New Zealand.

On Feb. 21 at 02:17 UTC, NASA's Aqua satellite flew over Tropical Cyclone Atu when it was over New Caledonia and Vanuatu bringing rainfall and gusty winds. On Feb. 22 at 13:53 UTC, AIRS showed an intensifying tropical Storm Atu with a developing eye.

Tropical Cyclone Atu was at its strongest on February 22 near 0900 UTC (4 a.m. EST), when it was about 315 miles (506 km) east of Noumea, New Caledonia, near 22.7 South and 172.1 East. It had maximum sustained winds of 95 knots (109 mph/175 kmh) at that time. It was moving at 15 knots (17 mph/28 kmh) in a southerly direction, and was starting to weaken. By mid-day on Feb. 22, the warnings for Vanuatu had been discontinued, and there were some warnings still in effect for New Caledonia for winds in excess of 20 knots (23 mph/37 kmh) and high ocean swells.

On Feb. 23 at 02:05 UTC, AIRS data showed a powerful cyclone with strong thunderstorms, heavy rain and a visible eye on infrared imagery. On February 23, at 0900 UTC (4 a.m. EST), Tropical Cyclone Atu had maximum sustained winds of 70 knots (80 mph/129 kmh) with higher gusts. Tropical storm-force winds extended out to 140 miles (225 km) from the center of Atu. Cyclone-force winds extended to a much smaller area, only about 60 miles (95 km) in diameter. It was located in the southwestern Pacific Ocean near 28.5S and 176.5E, about 500 miles (804 km) south-southwest of Nadi, Fiji. At that time, it was moving southeast near 22 knots (25 mph/40 kmh). Atu was generating high waves in the open ocean, with wave heights reaching 30 feet (9 meters). Atu was weakening and becoming an extra-tropical cyclone north of New Zealand.

The AIRS infrared data on Feb. 24 at 01:11 UTC showed Atu as a small rounded area of weak convection. By 9:46 a.m. EST that day, Atu had dissipated north of New Zealand.

Rob Gutro | EurekAlert!
Further information:
http://www.nasa.gov

More articles from Earth Sciences:

nachricht NASA examines Peru's deadly rainfall
24.03.2017 | NASA/Goddard Space Flight Center

nachricht Steep rise of the Bernese Alps
24.03.2017 | Universität Bern

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>