Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Three NASA Satellites Get Awesome Views of Super-Typhoon Choi-Wan

16.09.2009
NASA's Aqua, CloudSat and the Tropical Rainfall Measuring Mission (TRMM) captured stunning satellite images and different views of Super Typhoon Choi-Wan this week. Aqua provided cloud temperatures, CloudSat provided a side look into the storm at convection, precipitation and hot towers, and TRMM provided a look at the extent and intensity of rainfall in Choi-Wan.

NASA's Aqua satellite flew over Choi-Wan on September 15 at 1:30 p.m. local time, and captured an infrared image of the storm using the Atmospheric Infrared Sounder (AIRS) instrument. The infrared instrument provides valuable data on a tropical cyclone's cloud top temperatures.

They're important because they tell forecasters how high thunderstorms are, and the higher the thunderstorm, the more powerful it is, and the data helped forecasters see Choi-Wan's cloud tops were as cold as or colder than minus 63 degrees Fahrenheit (F).

AIRS infrared images depict different cloud temperatures in purple and blue. Those cloud that appear in purple on AIRS imagery have temperatures as cold as or colder than 220 degrees Kelvin or minus 63 degrees Fahrenheit (F). The blue areas are around 240 degrees Kelvin, or minus 27F. The colder the clouds are, the higher they are, and the more powerful the thunderstorms are that make up the cyclone. Areas that are false colored as purple, are where meteorologists would also find the "hot tower" clouds that the TRMM and CloudSat satellites see. In fact, in Choi-Wan, CloudSat identified several hot towers.

A hot tower is a tropical cumulonimbus cloud that penetrates the tropopause, i.e. it reaches out of the lowest layer of the atmosphere, the troposphere, into the stratosphere. In the tropics, the tropopause typically lies at least 15 kilometers (over 9 miles high) above sea level. These towers are called "hot" because they rise high due to the large amount of latent heat released as water vapor condenses into liquid.

NASA's CloudSat satellite completed an eye overpass of Super Typhoon Choi-Wan in the Western Pacific Ocean on September 15, at 0352Z (Sept. 14 at 11:52 p.m.). The CloudSat overpass shows the vertical cross section right through the center of the storm. The eye center is free of cirrus clouds with eye wall edges sloping outwards towards the top of the storm and with hot towers on both sides.

Natalie D. Tourville, of the Atmospheric Science Department at Colorado State University Fort Collins, Colo. is a member of the CloudSat team. Tourville said, "The storm has a well developed, fully enclosed circular eye wall (red circle in the image) around the eye center with intense convection and precipitation (orange and red reflectivities) extending outwards. The Aqua Infrared (AIRS) depicts cloud cover throughout the overpass but the CloudSat image reveals moats (convection free areas) containing a thick cirrus canopy between the spiral rain bands."

This is one a few inner eye images CloudSat has managed to capture of a Category 5 tropical cyclone.

Data from TRMM over flights are used in making the rainfall analysis at NASA's Goddard Space Flight Center in Greenbelt Md. The rainfall analysis showed that Choi-Wan is a large and well-organized. TRMM's Microwave Imager and Precipitation Radar instruments revealed that Choi-Wan has bands of heavy rainfall.

NASA's TRMM satellite captured an image of Choi-Wan's rainfall on September 13, as it was approaching Super Typhoon status. Rainfall in some areas exceeded 50 mm/hr, that's almost 2 inches per hour!

NASA satellites provide daily information to the National Hurricane Center, the Central Pacific Hurricane Center, and the U.S. Navy's Joint Typhoon Warning Center, all of whom forecast tropical cyclones.

For more information and updates about Choi-Wan's intensity and status, please visit: http://www.nasa.gov/mission_pages/hurricanes/archives/2009/h2009_Choi-Wan.html.

Text credit: Rob Gutro, NASA/Goddard Space Flight Center

Rob Gutro | EurekAlert!
Further information:
http://www.nasa.gov
http://www.nasa.gov/mission_pages/hurricanes/archives/2009/h2009_Choi-Wan.html

More articles from Earth Sciences:

nachricht World’s oldest known oxygen oasis discovered
18.01.2018 | Eberhard Karls Universität Tübingen

nachricht A close-up look at an uncommon underwater eruption
11.01.2018 | Woods Hole Oceanographic Institution

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>