Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NASA Sees Hurricane Julio Organize and Emit a Gamma-Ray Flash

08.08.2014

NASA's Fermi and Aqua satellites captured two different views of bursts of strength show by Hurricane Julio as it intensified. NASA's Fermi satellite saw a gamma-ray flash from Julio, while NASA's Aqua satellite saw Julio become more structurally organized as a hurricane.

Fermi Spots Julio's Gamma-Ray Flash


On August 6 at 22:30 UTC (6:30 p.m. EDT) NASA's Aqua satellite passed over Hurricanes Iselle (right) and Julio (left) approaching Hawaii. This image was created using three satellite passes.

Image Credit: NASA Goddard MODIS Rapid Response Team


A red cross marks Fermi's position at the time it detected a TGF above Tropical Storm Julio on Aug. 4. Green dots show lightning locations from WWLLN data 10 minutes before and after the TGF (magenta). Background: A GOES 15 image of Julio taken 19 minutes before the flash.

Image Credit: Michael Briggs/UAH and WWLLN; image: NASA/NOAA GOES Project

Shortly after 4:19 a.m. EDT on Monday, Aug. 4, NASA's Fermi Gamma-ray Space Telescope showed that Julio packs a wallop of a very different kind when its Gamma-ray Burst Monitor (GBM) detected a quick flash of high-energy light.

This type of outburst is known as a terrestrial gamma-ray flash (TGF). Produced by the powerful electric fields in thunderstorms, TGFs last only a few thousandths of a second but emit gamma rays that make up the highest-energy naturally-occurring light on Earth. Scientists estimate that, on average, about 1,100 TGFs occur each day.

... more about:
»EDT »Fermi »Flash »Flight »GBM »Hawaii »Hurricane »NASA »NHC »Space »hurricane »satellite »tropical

Fermi's GBM instrument can detect TGFs within about 500 miles (800 km) of the spacecraft, which is too imprecise to definitively associate these flashes with specific storms. In 2012, however, Fermi scientists used lightning location data to show that TGFs also emit strong radio bursts, signals that can pinpoint the flashes with much greater precision.

Lightning emits a broad range of very low frequency (VLF) radio waves, often heard as pop-and-crackle static on AM radio broadcasts. The World Wide Lightning Location Network (WWLLN), a research collaboration operated by the University of Washington in Seattle, uses these radio signals to pinpoint lightning discharges anywhere on the globe to within about 6 miles (10 km).

According to WWLLN data, a lightning-like radio burst occurred near Fermi just 1.89 milliseconds after the spacecraft captured the gamma-ray flash above Julio, then a tropical storm. The timing is so close that the two signals must be related. "As far as I know, a TGF from a tropical storm has never been reported before," said Michael Briggs, a member of the GBM team at the University of Alabama in Huntsville.

Aqua Spots a More Organized Storm 

Two days after Julio emitted a gamma-ray flash, NASA's Aqua satellite passed overhead and captured a visible image of the storm that showed it had become more structurally organized.

On August 6 at 22:30 UTC (6:30 p.m. EDT) NASA's Aqua satellite passed over Hurricanes Iselle and Julio approaching Hawaii. The visible image was captured from the Moderate Resolution Imaging Spectroradiometer or MODIS instrument. The hurricane appeared more compact and symmetric. By August 7, the National Hurricane Center noted that Julio's eye had cleared of clouds.

At 5 a.m. EDT (0900 UTC) on August 7, the National Hurricane Center (NHC) noted that Julio's maximum sustained winds had increased to near 100 mph (155 kph). The
NHC noted that some additional strengthening is possible before the storm begins gradually weakening at night and over the weekend of August 9 and 10.

The eye of Hurricane Julio was located near latitude 16.8 north and longitude 134.9 west, about 1,340 miles (2,155 km east of Hilo, Hawaii. Julio is moving toward the west-northwest near 17 mph (28 kph) and this general motion is expected to continue for the next 48 hours. The estimated minimum central pressure is 976 millibars.

The NHC intensity forecast calls for Julio to remain at hurricane strength for the next 2-3 days (through August 9 or 10). Only gradual weakening is anticipated at the end of the forecast period since Julio will be moving over increasingly warmer waters to the north and west of Hawaii.

Related Links:

Fermi Improves its Vision for Thunderstorm Gamma-Ray Flashes (12.06.2012) - http://www.nasa.gov/mission_pages/GLAST/news/vision-improve.html
NASA's Fermi Catches Thunderstorms Hurling Antimatter into Space (01.10.2011) - http://www.nasa.gov/mission_pages/GLAST/news/fermi-thunderstorms.html

Text credit:  Francis Reddy / Rob Gutro
NASA's Goddard Space Flight Center

Rob Gutro | Eurek Alert!
Further information:
http://www.nasa.gov/content/goddard/julio/#.U-Ox8mO-5yw

Further reports about: EDT Fermi Flash Flight GBM Hawaii Hurricane NASA NHC Space hurricane satellite tropical

More articles from Earth Sciences:

nachricht Over 70% of glacier volume in Everest region could be lost by 2100
27.05.2015 | European Geosciences Union

nachricht Climate engineering may save coral reefs, study shows
26.05.2015 | University of Exeter

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Advance in regenerative medicine

The only professorship in Germany to date, one master's programme, one laboratory with worldwide unique equipment and the corresponding research results: The University of Würzburg is leading in the field of biofabrication.

Paul Dalton is presently the only professor of biofabrication in Germany. About a year ago, the Australian researcher relocated to the Würzburg department for...

Im Focus: Basel Physicists Develop Efficient Method of Signal Transmission from Nanocomponents

Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.

Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...

Im Focus: IoT-based Advanced Automobile Parking Navigation System

Development and implementation of an advanced automobile parking navigation platform for parking services

To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...

Im Focus: First electrical car ferry in the world in operation in Norway now

  • Siemens delivers electric propulsion system and charging stations with lithium-ion batteries charged from hydro power
  • Ferry only uses 150 kilowatt hours (kWh) per route and reduces cost of fuel by 60 percent
  • Milestone on the road to operating emission-free ferries

The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...

Im Focus: Into the ice – RV Polarstern opens the arctic season by setting course for Spitsbergen

On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.

RV Polarstern will enter the sea-ice zone north of Spitsbergen. Covering two shallow regions on their way to deeper waters, the scientists on board will focus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International symposium: trends in spatial analysis and modelling for a more sustainable land use

20.05.2015 | Event News

15th conference of the International Association of Colloid and Interface Scientists

18.05.2015 | Event News

EHFG 2015: Securing health in Europe. Balancing priorities, sharing responsibilities

12.05.2015 | Event News

 
Latest News

Researchers develop intelligent handheld robots

27.05.2015 | Power and Electrical Engineering

"Hidden" fragrance compound can cause contact allergy

27.05.2015 | Health and Medicine

Supernovas help 'clean' galaxies

27.05.2015 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>