Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

3 NASA satellites seek clues to Hurricane Julia's rapid intensification

16.09.2010
Hurricane Julia intensified rapidly overnight and is now a Category 4 hurricane on the Saffir-Simpson Scale and NASA's Aqua, Terra and TRMM satellites captured clues as they passed over her from space.

The Tropical Rainfall Measuring Mission (TRMM) satellite passed over intensifying hurricane Julia during the afternoon of Sept. 14 and captured very heavy rain falling at 1807 UTC (2:07 p.m. EDT). That heavy rainfall was a clue that she would intensify overnight, and today, Sept. 15, she has become a Category Four hurricane on the Saffir-Simpson Scale.

TRMM's Precipitation Radar data showed that concentric rain bands circling Julia's center were dropping heavy rainfall at over 50 mm/hr (~2 inches). TRMM showed that the heaviest rainfall was located in powerful thunderstorms northwest of Julia's center of circulation. Julia's wind speeds increased to 115 knots (~132 mph) by early on Wednesday, September 15 making it a category four hurricane on the Saffir-Simpson scale.

On Sept. 14 at 12:40 UTC (8:40 a.m. EDT) the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite captured a visible image of Hurricane Julia before her rapid intensification. In that image, her eye was cloud-filled. Today Julia has "a clear eye structure with impressive cloud top enhancement," according to the National Hurricane Center which is a clear sign that she strengthened since Terra passed by on Sept. 14.

NASA's Aqua satellite flew over Julia today, Sept. 15. The Atmospheric Infrared Sounder (AIRS) instrument onboard captured an infrared image of Julia at 0353 UTC (Sept. 14 at 11:53 p.m. EDT) and did not yet show an eye, which developed later. It did show very strong thunderstorms around Julia's center where cloud heights were as cold as -63 degrees Fahrenheit and heavy rain was falling.

At 11 a.m. EDT today, Sept. 15, Julia's maximum sustained winds were near 135 mph. Julia is a much small storm than the monster that Igor has become. Igor's tropical storm-force winds extend out farther than 275 miles from the center, while Julia's extend 115 miles making her less than half the size of Igor.

The outflow from Hurricane Igor and a nearby upper-level low pressure area are combining to produce southerly wind shear over Julia, which is what the National Hurricane Center noted as the reasons her intensity leveled off this morning.

Julia was located about 595 miles west-northwest of the Cape Verde Islands, near latitude 18.2 North and longitude 32.7 West. Her estimated minimum central pressure is 950 millibars. Julia is moving toward the northwest near 15 mph and this general motion is expected to continue over the next day or two.

Julia is expected to maintain its intensity today before slowly weakening later on Sept. 16 from increased southerly wind shear and cooler sea surface temperatures.

Rob Gutro | EurekAlert!
Further information:
http://www.nasa.gov
http://www.eurekalert.org/pub_releases/2010-09/nsfc-3ns091510.php

More articles from Earth Sciences:

nachricht Heidelberg Researchers Study Unique Underwater Stalactites
24.11.2017 | Universität Heidelberg

nachricht Lightning, with a chance of antimatter
24.11.2017 | Kyoto University

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: New proton record: Researchers measure magnetic moment with greatest possible precision

High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons

The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

IceCube experiment finds Earth can block high-energy particles from nuclear reactions

24.11.2017 | Physics and Astronomy

A 'half-hearted' solution to one-sided heart failure

24.11.2017 | Health and Medicine

Heidelberg Researchers Study Unique Underwater Stalactites

24.11.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>