Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


NASA 3-D Image Clearly Shows Wind Shear's Effect on Tropical Storm Gabrielle

Data obtained from NASA's TRMM satellite was used to create a 3-D image of Tropical Storm Gabrielle's rainfall that clearly showed wind shear pushed all of the storm's the rainfall east of its center.

NASA's Tropical Rainfall Measuring Mission satellite known as "TRMM" flew directly above tropical Storm Gabrielle on September 10, 2013 at 2124 UTC (5:24 p.m. EDT) as the storm approached Bermuda. TRMM's Precipitation Radar (PR) data found that rain was falling at a rate of over 127mm/~5 inches per hour in a line of intense storms southeast of Bermuda. TRMM PR also found that the tallest thunderstorms, reaching to heights above 15.5km (~9.6 miles), were located in an area close to Gabrielle's center of circulation.

This 3-D image of Tropical Storm Gabrielle's rainfall was created by data from NASA's TRMM satellite, and clearly shows wind shear had pushed all the rainfall east of center.
Image Credit: SSAI/NASA, Hal Pierce

Wind shear was affecting Gabrielle on Sept. 10 and continued to affect the storm on Sept. 11. Winds are blowing from the southwest at 15 to 20 knots and pushing the clouds and rain associated with Gabrielle to the northeast of the center. On Sept. 11, tropical storm force winds extend outward up to 115 miles/185 km, and because of wind shear, those strong winds were mostly northeast of the center.

Wind shear is basically any change in wind speed or direction along a straight line. In reference to tropical cyclones it means winds vertically from the ocean surface to top of the troposphere. Wind shear removes the heat and moisture that tropical cyclones require around their center of circulation and it will elongate the storm. When a storm elongates, basically the top is blown away from the bottom part of the storm, tilting the circulation center (think of tilting a tire at a 45 degree angle for example). Whenever the center tilts, it can't rotate as easily, and it's a less-efficient heat engine, so winds coming in at the low levels and flowing out at the upper levels get disrupted, generally causing the storm to weaken.

Although Bermuda's watches and warnings have been dropped, Gabrielle is still expected to bring between 1 and 3 inches of rainfall to the island today. Tropical-storm force winds will wane early on Sept. 11, but rough surf is expected to continue as Gabrielle pulls away.

At 8 a.m. EDT/1200 UTC, Gabrielle's maximum sustained winds were near 50 mph/85 kph and weakening is forecast during the next 48 hours. The center of Tropical Storm Gabrielle was located near latitude 32.4 north and longitude 65.7 west. At that time, Gabrielle was stationary but is expected to start moving slowly to the northwest then turn north on Sept. 12. At 8 a.m. EDT an elevated station at Commissioners Point on Bermuda reported a wind gust of 47 mph/76 kph.

The National Hurricane Center noted that over the next two to three days, whatever is left of Gabrielle is expected to merge with a frontal system moving east.

Text credit: Rob Gutro/Hal Pierce
SSAI/NASA's Goddard Space Flight Center

Rob Gutro/Hal Pierce | EurekAlert!
Further information:

More articles from Earth Sciences:

nachricht Oasis of life in the ice-covered central Arctic
24.10.2016 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

nachricht Receding glaciers in Bolivia leave communities at risk
20.10.2016 | European Geosciences 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: 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...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

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

Oasis of life in the ice-covered central Arctic

24.10.2016 | Earth Sciences

‘Farming’ bacteria to boost growth in the oceans

24.10.2016 | Life Sciences

Light-driven atomic rotations excite magnetic waves

24.10.2016 | Physics and Astronomy

More VideoLinks >>>