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 Geophysicists and atmospheric scientists partner to track typhoons' seismic footprints
16.02.2018 | Princeton University

nachricht NASA finds strongest storms in weakening Tropical Cyclone Sanba
15.02.2018 | NASA/Goddard Space Flight Center

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

Im Focus: Autonomous 3D scanner supports individual manufacturing processes

Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).

Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Fingerprints of quantum entanglement

16.02.2018 | Information Technology

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers

16.02.2018 | Health and Medicine

Hubble sees Neptune's mysterious shrinking storm

16.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>