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 eyes Pineapple Express soaking California
24.02.2017 | NASA/Goddard Space Flight Center

nachricht 'Quartz' crystals at the Earth's core power its magnetic field
23.02.2017 | Tokyo Institute of Technology

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>