Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


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

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:

More articles from Earth Sciences:

nachricht UCI and NASA document accelerated glacier melting in West Antarctica
26.10.2016 | University of California - Irvine

nachricht Ice shelf vibrations cause unusual waves in Antarctic atmosphere
25.10.2016 | American Geophysical Union

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

The gene of autumn colours

27.10.2016 | Life Sciences

Polymer scaffolds build a better pill to swallow

27.10.2016 | Life Sciences

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>